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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivatives in Cash Flow Hedging Relationships:
Gain (loss) related to effective portion of derivatives recognized in accumulated other comprehensive loss	$ 1,612	$ (17,490)	$ (25,276)	$ (26,471)
Gain related to effective portion of derivatives reclassified from accumulated other comprehensive loss to interest expense	$ 880	843	2,546	2,312
Loss related to ineffective portion of derivatives recognized in other expense, net		$ (1)	$ (1)	$ (288)