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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]    
Income before income tax $ 21,817 $ 55,975
Provision for income taxes $ 6,755 $ 17,691
Effective tax rate (as a percent) (31.00%) 31.60%
Unrecognized Tax Benefits, Period Increase (Decrease) $ 3,400  
Unrecognized tax benefits approximate amount of estimated reduction within the next twelve months $ 8,000