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Business Segment Information - Reconciliation of Reportable Segment Amounts (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Consolidated operating income | $ 3,299 | $ (2,825) | $ 4,068 | $ (42,531)
Adjustments to reconcile to income (loss) before income (loss) tax expense attributable to the Company: |  |  |  |
Corporate payroll and benefits | (2,637) | (2,285) | (8,014) | (8,839)
Corporate legal and professional fees | (1,106) | (1,321) | (4,340) | (4,386)
Corporate general and administrative | (1,715) | (1,900) | (5,223) | (6,693)
Corporate depreciation and amortization | (2,145) | (1,777) | (6,155) | (5,807)
Other income, net | 81 | 17 | 652 | 208
Income (loss) before income tax expense | 28,834 | 5,829 | 68,593 | (19,417)
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Consolidated operating income | 30,932 | 9,537 | 78,381 | (6,195)
Segment Reconciling Items |  |  |  |
Adjustments to reconcile to income (loss) before income (loss) tax expense attributable to the Company: |  |  |  |
Corporate payroll and benefits | (690) | (587) | (2,155) | (2,444)
Corporate legal and professional fees | (1,024) | (1,176) | (4,154) | (3,850)
Corporate general and administrative | (1,011) | (1,116) | (3,236) | (4,273)
Corporate depreciation and amortization | (132) | (148) | (408) | (337)
Corporate interest income (expense), net | 54 | (680) | (944) | (2,446)
Other income, net | 705 | (1) | 1,109 | 128
Income (loss) before income tax expense | $ 28,834 | $ 5,829 | $ 68,593 | $ (19,417)

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