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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Taxes        
Income tax expense (benefit) $ 2,003 $ 2,278 $ (91) $ 3,854
Effective tax rate (28.98%) (170.25%) 0.65% (177.50%)
Statutory federal income tax rate     21.00%