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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 125,054 $ 94,455 $ 136,576
Charged to expense - additions 48 33,238 2,124
Release of valuation allowance - deductions (2,004) (2,639) (44,245)
Charged to expense - deductions 0 0 0
Balance at end of period 123,098 125,054 94,455
State Operating Loss Carry-Forwards      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 81,202 47,964 61,560
Charged to expense - additions 0 33,238 0
Release of valuation allowance - deductions (2,004) 0 (13,596)
Charged to expense - deductions 0 0 0
Balance at end of period 79,198 81,202 47,964
Deferred Deductible Temporary Differences      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period   0 9,088
Charged to expense - additions     0
Release of valuation allowance - deductions     (9,088)
Charged to expense - deductions     0
Balance at end of period     0
Charitable Contributions      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 658 3,297 3,156
Charged to expense - additions 48 0 141
Release of valuation allowance - deductions 0 (2,639) 0
Charged to expense - deductions 0 0 0
Balance at end of period 706 658 3,297
162(m) Officers Compensation      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period   0 5,957
Charged to expense - additions     0
Release of valuation allowance - deductions     (5,957)
Charged to expense - deductions     0
Balance at end of period     0
AMT Credit      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period   0 12,413
Charged to expense - additions     1,983
Release of valuation allowance - deductions     (14,396)
Charged to expense - deductions     0
Balance at end of period     0
Foreign Tax Credits      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 43,194 43,194 44,402
Charged to expense - additions 0 0 0
Release of valuation allowance - deductions 0 0 (1,208)
Charged to expense - deductions 0 0 0
Balance at end of period $ 43,194 $ 43,194 $ 43,194