{
  "schema": "canli.company-reference.v1",
  "cik": "0001051343",
  "name": "COMMUNITY WEST BANCSHARES",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001051343.json",
  "source_sha256": "55c0f8e0135e82ff6288413a121a82e2c6a91c9e623e46d94481962e717002fc",
  "fetched_at": "2026-09-23T02:44:21.190Z",
  "policy": "Latest-filed annual-report facts per unit and reporting period at capture time. Duration facts cover 300 to 400 days. This selection can include restatements and is not a point-in-time backtest dataset. Missing concepts are omitted, never zero-filled. Values retain original units and are not currency converted. Extended concepts require compatible unit shapes and at least three reporting ends with changing values within one unit. Constant or incompatible added histories are omitted.",
  "claim_boundary": "Public company accounting reference, not market prices, returns, an investment recommendation, or ALPHAC performance. Validate a separately constructed return series with the validation API; accounting values are not returns.",
  "concepts": [
    {
      "tag": "Assets",
      "taxonomy": "us-gaap",
      "label": "Total assets",
      "kind": "instant",
      "meaning": "Resources recognized on the balance sheet. Book assets are not the market value of the business.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 1087068000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 1091502000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 1157052000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 975435000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 913870000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 877291000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 833315000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 710572000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 621213000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 557318000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 539000000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 532101000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 633348000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 667604000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Liabilities",
      "taxonomy": "us-gaap",
      "label": "Total liabilities",
      "kind": "instant",
      "meaning": "Recognized obligations at the reporting date. The definition and scope differ from interest-bearing debt.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 970824000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 978852000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 1055677000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 886428000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 831892000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 801140000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 763245000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 645236000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 559269000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 490311000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 471444000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 479052000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 582722000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 605962000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "StockholdersEquity",
      "taxonomy": "us-gaap",
      "label": "Stockholders equity",
      "kind": "instant",
      "meaning": "The reported residual interest after liabilities. It is an accounting amount, not market capitalization.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 116244000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 112650000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 101375000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 89007000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 81978000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 76151000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 70070000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 65336000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 61944000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 67007000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 67556000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 53049000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 50626000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 61642000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 60307000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 66618000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Net income or loss",
      "kind": "duration",
      "meaning": "Reported profit or loss for the period. Check the filing for attribution, exceptional items and discontinued operations before comparing companies.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 7316000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 13449000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 13101000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8245000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 7963000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 7409000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4915000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 5229000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2870000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 7046000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8986000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3173000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -10485000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2091000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -5763000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInOperatingActivities",
      "taxonomy": "us-gaap",
      "label": "Operating cash flow",
      "kind": "duration",
      "meaning": "Cash generated or used by operating activities. Working-capital timing can make this differ substantially from reported income.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 25586000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 5856000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 22220000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 15843000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 13937000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 16321000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 14243000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 7870000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 7012000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10998000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10085000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 8040000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 14338000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1067000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsToAcquirePropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Capital expenditure payments",
      "kind": "duration",
      "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 482000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 239000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 206000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 338000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 2145000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1564000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2335000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1616000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 371000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 394000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 215000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 284000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 549000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 61000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 52000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
      "taxonomy": "us-gaap",
      "label": "Contract revenue excluding tax",
      "kind": "duration",
      "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 987000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 853000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 711000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 455000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 666000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 555000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInFinancingActivities",
      "taxonomy": "us-gaap",
      "label": "Financing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. A positive amount does not establish operating profitability.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -14514000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -76647000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 167838000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 53603000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 22347000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 32780000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 114519000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 84184000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 59429000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -2061000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -104221000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -22386000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -19194000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 34147000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInInvestingActivities",
      "taxonomy": "us-gaap",
      "label": "Investing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from investing activities, including asset purchases, disposals and investment transactions. This differs from capital expenditure payments alone.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -3564000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -72894000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -42223000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -91567000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -10538000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -38055000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -117009000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -93457000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -49881000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -17350000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 99348000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 30799000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 5571000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -41956000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RetainedEarningsAccumulatedDeficit",
      "taxonomy": "us-gaap",
      "label": "Retained earnings or deficit",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Accumulated undistributed earnings or deficit at the reporting date. This balance is not cash available for distribution.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 70646000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 67727000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 56852000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 46063000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 39470000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 33328000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 27441000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 23790000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 19657000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 18005000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 12065000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 4118000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1991000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 13523000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfSharesOutstandingBasic",
      "taxonomy": "us-gaap",
      "label": "Basic weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Time-weighted shares used for basic earnings per share. This denominator differs from shares outstanding at a single reporting date.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 8840524,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 8722481,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 8567839,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8472709,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8470000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8288000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 8146000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 8114000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 8203000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 8141000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7017000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 5990000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5980000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 5915,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 5915000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfDilutedSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Diluted weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Weighted-average shares used for diluted earnings per share. Potential shares are included under the applicable dilution rules, not simply added to outstanding shares.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 8979201,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 8892127,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 8722938,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8542829,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8579000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8451000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 8589000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 8444000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 8491000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 8505000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8390000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 8233000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5980000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 6833,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 5915000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareBasic",
      "taxonomy": "us-gaap",
      "label": "Basic earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per basic common share or unit. Inspect attribution, share classes and restatements before comparing periods. This is not a market return.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 0.83,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 1.54,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 1.53,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 0.97,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 0.94,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0.89,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 0.6,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0.64,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0.31,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0.77,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1.13,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.36,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -1.93,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.18,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -1.15,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareDiluted",
      "taxonomy": "us-gaap",
      "label": "Diluted earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. A diluted value can equal the basic value without implying no potential dilution.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 0.81,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 1.51,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 1.5,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 0.97,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 0.93,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0.88,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 0.57,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0.62,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0.3,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0.75,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 0.98,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.31,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -1.93,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 0.18,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -1.15,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "IncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Current and deferred income tax expense or benefit for continuing operations. This accounting expense differs from cash taxes paid.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 3494000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 5262000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 5212000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 3510000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3411000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2809000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 5548000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3613000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2138000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 4934000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -2812000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 4077000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1467000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -4018000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentNet",
      "taxonomy": "us-gaap",
      "label": "Net property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of property, plant and equipment after accumulated depreciation, depletion and amortization. It is not replacement cost or market value.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 5817000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 6104000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 6576000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 7154000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 7655000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 6381000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 5581000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3931000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2993000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3053000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2983000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3068000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 3090000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2915000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ShareBasedCompensation",
      "taxonomy": "us-gaap",
      "label": "Share-based compensation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Reported noncash expense for share-based payment arrangements. Noncash treatment does not mean the awards have no economic cost to shareholders.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 464000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 289000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 318000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 319000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 382000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 478000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 537000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 338000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 412000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 308000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 59000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 117000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 33000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 19000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 29000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestExpense",
      "taxonomy": "us-gaap",
      "label": "Interest expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Borrowing costs recognized as interest expense. This is distinct from cash interest paid and may not include every capitalized borrowing cost.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 15115000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 3328000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 3704000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 7265000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 11382000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8988000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4729000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3127000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2516000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 3275000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 4332000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 5949000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 8250000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 9957000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 14945000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsForRepurchaseOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Common-stock repurchase payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid to reacquire common stock during the period. This is not an authorization limit or a direct measure of the net change in share count.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 0,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1030000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 669000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 0,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1338000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 28000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 0,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CommonStockSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Common shares outstanding",
      "kind": "instant",
      "unitKind": "shares",
      "meaning": "Common shares outstanding at the reporting date. This point-in-time count differs from the weighted-average shares used for earnings per share and can exclude other share classes.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 8875012,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "shares"
        },
        {
          "end": "2022-12-31",
          "val": 8798412,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "shares"
        },
        {
          "end": "2021-12-31",
          "val": 8650166,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "shares"
        },
        {
          "end": "2020-12-31",
          "val": 8472463,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "shares"
        },
        {
          "end": "2019-12-31",
          "val": 8472463,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "shares"
        },
        {
          "end": "2018-12-31",
          "val": 8533346,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "shares"
        },
        {
          "end": "2017-12-31",
          "val": 8193339,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 8096039,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 8205858,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 8203033,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 7866783,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 5994510,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 5989510,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "shares"
        },
        {
          "end": "2010-12-31",
          "val": 5916272,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
      "taxonomy": "us-gaap",
      "label": "Cash including restricted cash",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cash, cash equivalents and restricted cash as reported in the cash flow reconciliation. Restricted amounts are not freely available, so this is not the same as unrestricted cash.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 72198000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 64690000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 208375000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 60540000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 82661000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 56915000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 45869000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 34116000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2016Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Accumulated other comprehensive income or loss",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative other comprehensive items after tax, such as translation and unrealized hedging or securities effects. These amounts have not passed through net income.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": -1016000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": -771000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 92000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 35000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -78000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": -141000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 25000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -29000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -68000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 31000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": -274000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 35000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 139000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 179000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseRightOfUseAsset",
      "taxonomy": "us-gaap",
      "label": "Operating lease right-of-use asset",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of the right to use leased assets under operating leases. It reflects discounted remaining payments, not the value of the underlying property.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 4300000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 5200000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 5100000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 5900000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 6300000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseLiability",
      "taxonomy": "us-gaap",
      "label": "Operating lease liability",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Present value of remaining operating lease payments. Discount-rate choices and lease terms affect the amount; it is not the sum of undiscounted future rent.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 4400000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 5261000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 5140000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 5955000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 6316000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 0,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentGross",
      "taxonomy": "us-gaap",
      "label": "Gross property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cost of property, plant and equipment before accumulated depreciation. Historical cost does not indicate current value or replacement cost.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 19891000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 19962000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 19722000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 19897000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 20149000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 18063000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 16565000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 14232000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 12618000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 12911000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 12517000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 12310000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 12195000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Accumulated depreciation on property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative depreciation, depletion and amortization recorded against property, plant and equipment. It measures cost allocation to date, not physical wear or market value.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 14074000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 13858000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 13146000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 12743000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 12494000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 11682000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 10984000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 10301000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 9625000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 9858000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 9534000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 9242000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 9105000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredTaxAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net deferred tax assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Deferred tax assets after the valuation allowance. Realization depends on future taxable income, so the balance is not a receivable from tax authorities.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 7506000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 7057000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 6555000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 6237000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 5123000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4705000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 4076000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 4760000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 4216000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 4016000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 5583000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1421000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2012Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
      "taxonomy": "us-gaap",
      "label": "Pre-tax income or loss from continuing operations",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income or loss from continuing operations before income taxes and noncontrolling interests. It excludes discontinued operations and is not net income.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 10810000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 18711000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 18313000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 11755000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 11374000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ComprehensiveIncomeNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Comprehensive income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income plus other comprehensive income after tax. It includes unrealized items that net income excludes and is not a cash measure.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 7071000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 12586000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 13158000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8358000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8026000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 7302000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4969000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 5268000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2771000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 7351000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 8677000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3069000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -10525000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2092000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -5534000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLossAvailableToCommonStockholdersBasic",
      "taxonomy": "us-gaap",
      "label": "Net income available to common stockholders",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income after preferred dividends and similar adjustments, the numerator for basic earnings per share. It can be lower than reported net income.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4915000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 5229000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2554000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 6268000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7947000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2127000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -11532000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1044000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -6809000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CurrentIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Current income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income tax expense or benefit for the period that is currently payable or refundable. It differs from cash taxes paid and from total tax expense.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 3448000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 5512000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 5717000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 4469000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3739000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 3338000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 5020000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 4022000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2159000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 3712000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1430000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -98000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -1548000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2538000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Deferred income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The deferred portion of income tax expense or benefit, arising from timing differences. It is not tax paid in the period.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 46000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -250000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -505000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -959000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -328000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -529000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 528000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -409000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -21000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1222000,
          "accn": "0001140361-17-010544",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-03",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1123000,
          "accn": "0001140361-16-056515",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-04",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1419000,
          "accn": "0001140361-15-010836",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-09",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -1061000,
          "accn": "0001140361-14-012849",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-17",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -1071000,
          "accn": "0001140361-13-014560",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-29",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -3222000,
          "accn": "0001140361-12-018319",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-30",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestPaidNet",
      "taxonomy": "us-gaap",
      "label": "Interest paid, net",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash interest paid during the period, net of amounts capitalized where the filer reports it that way. It differs from interest expense recognized.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 12886000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 3260000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 3880000,
          "accn": "0001140361-24-018439",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-04-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 8050000,
          "accn": "0001140361-23-015469",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-31",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 11675000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8321000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 4357000,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3072000,
          "accn": "0001140361-19-004617",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-08",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2436000,
          "accn": "0001140361-18-011708",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-02",
          "frame": "CY2015",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeasePayments",
      "taxonomy": "us-gaap",
      "label": "Operating lease payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid for operating lease liabilities during the period. It differs from lease expense recognized and excludes variable payments in some presentations.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 992000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1042000,
          "accn": "0001140361-22-011674",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-29",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1117000,
          "accn": "0001140361-21-008391",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0,
          "accn": "0001140361-20-005343",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-10",
          "frame": "CY2018",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/55c0f8e0135e82ff6288413a121a82e2c6a91c9e623e46d94481962e717002fc.json.gz"
}
