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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Income Tax Disclosure [Abstract]    
Income tax provision $ 3,200 $ 9,790
Effective income tax rate (as a percent) 21.90% 20.90%
Statutory U.S. income tax rate (as a percent) 21.00% 21.00%
Income taxes paid (refunds), net $ (11,000) $ (12,000)