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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Tax Contingency [Line Items]        
Income tax expense increase (decrease) $ 12,100   $ 5,900  
Income Tax Expense (Benefit) 1,913 $ 14,049 $ 4,654 $ 10,641
Effective tax rate estimate     4.30% 11.60%
Unrecognized tax benefits 14,900 12,900 $ 14,900 $ 12,900
Tax benefits that, if recognized, would affect the effective tax rate 3,900 $ 3,500 3,900 $ 3,500
Tax Year 2017        
Income Tax Contingency [Line Items]        
Income Tax Expense (Benefit) $ 7,500   $ 7,500