Discontinued Operations and Assets Held for Sale - Summarized operating results of the Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of discontinued operations before taxes, net	$ (418)	$ (107,780)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	239,750	369,484
Depreciation and amortization expense	0	(24,511)
Share-based compensation expense	(242)	(445)
Other direct costs	(201,197)	(378,881)
Loss on impairment of assets	(1,064)	0
Other non-operating expense	(11,163)	(55,057)
Loss on sale of discontinued operations before taxes, net	(16,837)	(23,553)
Pretax income (loss) of discontinued operations	9,247	(112,963)
Income tax (expense) benefit	(9,665)	5,183
Loss from discontinued operations, net of tax	(418)	(107,780)
Operating cash flows of discontinued operations	31,117	47,381
Investing cash flows of discontinued operations	(4,858)	(14,158)
Financing cash flows of discontinued operations	$ (13,559)	$ 20,797

Disposal Group, Including Discontinued Operation, Nonoperating Income (Expense)

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Disposal Group Including Discontinued Operation, Share-Based Compensation Expense

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Impairment Of Long-Lived Assets Held-For-Use And Held-For-Sale

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Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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