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, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivatives in Cash Flow Hedging Relationships:
(Loss) gain related to effective portion of derivatives recognized in accumulated other comprehensive (loss) income	$ (2,147)	$ 4,046	$ (2,873)	$ 4,718
Gain (loss) related to effective portion of derivatives reclassified from accumulated other comprehensive (loss) income to interest expense	$ 738	$ (382)	$ 1,133	$ (722)