Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current	$ 25,790	$ 24,439	$ 26,199
Deferred	825	1,172	(2,111)
Total	$ 26,615	$ 25,611	$ 24,088