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Schedule II Valuation and Qualifying Accounts (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance $ 5,847 $ 41,924 $ 42,154
Additions Charged to other accounts 38,150   276
Deductions (1,121) (36,077) (506)
Balance $ 42,876 $ 5,847 $ 41,924