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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