Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
U.S. federal	$ 5,659	$ 13,553	$ 717
State and local	3,169	4,450	756
Total current income tax expense	8,828	18,003	1,473
Deferred
U.S. federal	(3,808)	(2,416)	3,478
State and local	2,508	(2,391)	975
Total deferred income tax expense	(1,300)	(4,807)	4,453
Income tax expense (benefit)
U.S. federal	1,851	11,137	4,195
State and local	5,677	2,059	1,731
Income tax expense, total	$ 7,528	$ 13,196	$ 5,926