Income Taxes - Summary of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 33,032	$ 11,917	$ 21,030
State	6,958	2,173	4,095
Total	39,990	14,090	25,125
Deferred:
Federal	2,163	13,646	(12,708)
State	838	4,004	(2,559)
Total	3,001	17,650	(15,267)
Tax provision	$ 42,991	$ 31,740	$ 9,858