Fair Value Measures and Other Financial Instruments - Schedule of Effect of Interest Rate Swaps Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging [Member], Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income	$ 1,109	$ (2,398)	$ (2,454)	$ 3,691
Loss reclassified from accumulated other comprehensive income into interest expense	$ (1,058)	$ (1,033)	$ (3,134)	$ (3,044)