Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes [Abstract]
Income tax provision	$ 14,419	$ 8,215	$ 25,743	$ 11,294
Effective income tax rate	40.30%	41.10%	41.20%	40.10%