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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
Deferred Tax Valuation Allowance [Member]      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 244,153 $ 264,398 $ 238,236
Additions 49,130 14,189 26,162
Reductions (5,604) (34,434) 0
Balance at End of Year 287,679 244,153 264,398
LIFO Reserve [Member]      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 11,428 20,020 17,571
Charged to Cost and Expense 357 491 3,474
Reductions (4,636) (9,083) (1,025)
Balance at End of Year $ 7,149 $ 11,428 $ 20,020