Derivative Instruments and Hedging Activities - Earnings Effect of Derivative Instruments in Condensed Consolidated Statements of Operations and 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
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Classification of Gain (Loss) Recognized	$ (855)	$ 1,712	$ (5,779)	$ (2,707)
Cash Flow Hedges [Member] | Interest Rate Swap [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Classification of Gain (Loss) Recognized	$ (855)	$ 1,712	$ (5,779)	$ (2,707)