Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 30,410	$ 17,435	$ 24,524
State and local	2,075	4,033	3,722
Total current	32,485	21,468	28,246
Deferred:
Federal	13,573	27,452	9,496
State and local	(16,259)	(22,641)	7
Total deferred	(2,686)	4,811	9,503
Total income tax expense	$ 29,799	$ 26,279	$ 37,749