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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Effective income tax rate (percent) (6.60%) 23.20%  
Income Tax Benefit $ 1,589 $ (6,738)  
pretax book income 24,014 $ 29,066  
Gross unrecognized tax benefit 2,500   $ 2,200
Expected change in unrecognized tax benefits 800    
Accrued interest on income taxes 900   900
Accrued penalties on income taxes, less than $ 100   $ 100