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Income Taxes Income Taxes - Tax Attributes and Valuation Allowances (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Loss Carryforwards |  |  |
Balance at beginning of period, Valuation allowance | $ (1,027) | $ (822) |
Additions to valuation allowance |  | (205) |
Reductions to valuation allowance | 292 |  | $ 50,800
Balance at end of period, Valuation allowance | (735) | (1,027) | (822)
Deferred tax assets net | 212,949 | 173,146 |
Tax benefit from adjustments to valuation allowance |  |  | 50,200
Increase in deferred tax assets |  |  | 50,200
Domestic |  |  |
Operating Loss Carryforwards |  |  |
Operating loss carryforwards | 868,500 |  |
Operating loss carryforward not subject to expiration | 629,500 |  |
Tax credit carryforward | 3,000 |  |
State |  |  |
Operating Loss Carryforwards |  |  |
Operating loss carryforwards | 317,100 |  |
Operating loss carryforward not subject to expiration | 167,700 |  |
NOL valuation allowance | 700 | 1,000 |
Tax credit carryforward | $ 100 |  |
Net Operating Loss Carryforward | State |  |  |
Operating Loss Carryforwards |  |  |
Additions to valuation allowance |  |  | (600)
Continuing Operations |  |  |
Operating Loss Carryforwards |  |  |
Balance at beginning of period, Valuation allowance |  | $ (822) | (45,439)
Additions to valuation allowance |  |  | (580)
Reductions to valuation allowance |  |  | 45,197
Balance at end of period, Valuation allowance |  |  | (822)
Increase in deferred tax assets |  |  | 44,600
Discontinued Operations. |  |  |
Operating Loss Carryforwards |  |  |
Balance at beginning of period, Valuation allowance |  |  | (5,600)
Reductions to valuation allowance |  |  | 5,600
Increase in deferred tax assets |  |  | $ 5,600

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