Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current	$ 24,439	$ 26,199	$ 20,341
Deferred	1,172	(2,111)	(1,594)
Total	$ 25,611	$ 24,088	$ 18,747