Derivative Instruments and Hedging Activities - Schedule of Pre-tax Effect of Derivative Financial Instruments on Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivatives in Cash Flow Hedging Relationships:
Loss related to effective portion of derivatives recognized in accumulated other comprehensive loss	$ (8,267)	$ (6,832)	$ (26,888)	$ (8,981)
Gain related to effective portion of derivatives reclassified from accumulated other comprehensive loss to interest expense	$ 834	739	1,667	1,469
Loss related to ineffective portion of derivatives recognized in other expense (income), net		$ (1)	$ (1)	$ (287)