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Discontinued Operations - Summary of Pretax Profit (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Gain on sale of discontinued operations $ 0 $ 0 $ 79,318
Income from discontinued operations, net of tax $ 0 $ 0 76,296
Discontinued Operations, Disposed of by Sale | GS segment      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Revenue     27,737
Direct costs     19,494
Gross profit     8,243
Selling, general and administrative expenses     6,988
Depreciation and amortization     307
Income from discontinued operations     948
Gain on sale of discontinued operations     79,318
Other (expense) income, net     (436)
Income from discontinued operations, before income taxes     79,830
Income tax expense     3,534
Income from discontinued operations, net of tax     $ 76,296