Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Base-year bad debt reserves		$ 50,900	$ 50,900
Deferred income tax liability not recognized for base-year bad debt reserve		20,400
Valuation allowance	$ 94,800	4,200	113,099
Increase (decrease) in valuation allowance	7,906	$ (108,899)	(5,806)
Federal
Income Tax Disclosure [Abstract]
Operating loss carryover	175,400		195,000
State
Income Tax Disclosure [Abstract]
Operating loss carryover	$ 294,200		$ 314,000