Derivative Instruments and Hedging Activities - Schedule of Pre-tax Effect of Derivative Financial Instruments on Unaudited Condensed Consolidated Statements of Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivatives in Cash Flow Hedging Relationships:
Gain (loss) related to effective portion of derivatives recognized in accumulated other comprehensive loss	$ 2,130	$ (8,267)	$ 9,768	$ (26,888)
(Loss) gain related to effective portion of derivatives reclassified from accumulated other comprehensive loss to interest expense	$ (3,305)	$ 834	$ (6,941)	1,667
Loss related to ineffective portion of derivatives recognized in other expense (income), net				$ (1)