Income Taxes - Components of Current and Deferred Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 1,598
State and local	2,431	$ 94
Foreign	210
Total current	4,239	94
Deferred:
Federal	46,784	10,739
State and local	6,233	1,664
Foreign	(123)
Total deferred	52,894	12,403
Income tax expense from operations	$ 57,133	$ 12,497