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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Classification of Gain (Loss) Recognized	$ 1,821	$ (4,586)	$ (3,958)	$ (7,293)
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	$ 1,821	$ (4,586)	$ (3,958)	$ (7,293)