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Income Taxes - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Income Tax Disclosure [Abstract]          
Income tax provision $ 17,767,000 $ 9,771,000 $ 31,732,000 $ 16,233,000  
Pretax income $ 71,530,000 $ 36,524,000 $ 129,182,000 $ 68,939,000  
Effective income tax rate 24.84% 26.75% 24.56% 23.55%  
Unrecognized tax benefits $ 2,800,000   $ 2,800,000   $ 2,800,000
Interest accrued 323,000   323,000   276,000
Penalties accrued 0   0   $ 0
Decrease in unrecognized tax benefits is reasonably possible $ 902,000   $ 902,000