Derivative Instruments and Hedging Activities - Schedule of Pre-tax Effect of Derivative Financial Instruments on Unaudited Condensed Consolidated Statements of Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivatives in Cash Flow Hedging Relationships:
Loss related to effective portion of derivatives recognized in accumulated other comprehensive loss	$ (18,621)	$ (2,149)
Gain related to effective portion of derivatives reclassified from accumulated other comprehensive loss to interest expense	834	730
Loss related to ineffective portion of derivatives recognized in other (income) expense, net	$ (1)	$ (286)