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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 94,455 | $ 136,576 | $ 282,778
Charged to expense - additions | 33,238 | 2,124 | 4,552
Release of valuation allowance - deductions | (2,639) | (44,245) | (150,754)
Charged to expense - deductions | 0 | 0 | 0
Balance at end of period | 125,054 | 94,455 | 136,576
State Operating Loss Carry-Forwards |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 47,964 | 61,560 | 60,488
Charged to expense - additions | 33,238 | 0 | 0
Release of valuation allowance - deductions | 0 | (13,596) | 1,072
Charged to expense - deductions | 0 | 0 | 0
Balance at end of period | 81,202 | 47,964 | 61,560
Deferred Deductible Temporary Differences |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 0 | 9,088 | 10,590
Charged to expense - additions |  | 0 | 0
Release of valuation allowance - deductions |  | (9,088) | (1,502)
Charged to expense - deductions |  | 0 | 0
Balance at end of period |  | 0 | 9,088
Charitable Contributions |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 3,297 | 3,156 | 5,052
Charged to expense - additions | 0 | 141 | 0
Release of valuation allowance - deductions | (2,639) | 0 | (1,896)
Charged to expense - deductions | 0 | 0 | 0
Balance at end of period | 658 | 3,297 | 3,156
162(m) Officers Compensation |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 0 | 5,957 | 0
Charged to expense - additions |  | 0 | 0
Release of valuation allowance - deductions |  | (5,957) | 5,957
Charged to expense - deductions |  | 0 |
Balance at end of period |  | 0 | 5,957
AMT Credit |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 0 | 12,413 | 166,798
Charged to expense - additions |  | 1,983 | 0
Release of valuation allowance - deductions |  | (14,396) | (154,385)
Charged to expense - deductions |  | 0 | 0
Balance at end of period |  | 0 | 12,413
Foreign Tax Credits |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 43,194 | 44,402 | 39,850
Charged to expense - additions | 0 | 0 | 4,552
Release of valuation allowance - deductions | 0 | (1,208) | 0
Charged to expense - deductions | 0 | 0 | 0
Balance at end of period | $ 43,194 | $ 43,194 | $ 44,402

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