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Income Taxes - Components of Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current:      
Federal $ 1,053 $ (472) $ 41,005
State 467 476 7,301
Deferred 5,269 (12,216) (38,545)
Income tax expense (benefit) 6,789 (12,212) 9,761
Reconciliation of effective income tax:      
Tax at U.S. statutory rates 8,875 (10,542) 11,579
State income taxes, net of federal benefit 192 (1,750) 1,573
Federal income tax credits (864) (424) (3,004)
Dividends received deduction (468) (233) (955)
Valuation allowance (723) 733 441
Foreign tax rate differences (78) 240 116
Other (145) (236) 11
Income tax expense (benefit) $ 6,789 $ (12,212) $ 9,761