Income Taxes - Schedule of Income Tax Exepnse (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 26,741	$ 34,941	$ 30,757
State	4,472	4,928	4,533
Total current	31,213	39,869	35,290
Deferred:
Federal	11,047	4,870	10,056
State	1,402	475	1,220
Total deferred	12,449	5,345	11,276
Total income tax expense	$ 43,662	$ 45,214	$ 46,566