Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income tax reconciliation of effective tax rate
Federal statutory rate (as a percent)	35.00%	35.00%	35.00%
Tax at federal statutory rate	$ (10,185)	$ 10,073	$ 2,109
State and local income taxes, net of federal income tax benefit	1,335	2,144	830
Effect of state rate changes	1,263	(89)	1,036
Nondeductible equity-based compensation	1,316	728	1,725
Nondeductible expenses, tax reserve adjustments, and other, net	684	340	226
Income tax expense, total	$ 7,528	$ 13,196	$ 5,926