Derivative Instruments - Gains (Losses) on Derivative Instruments and Classification on Condensed Consolidated Statement of Operations (Detail) - Designated As Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivatives, Fair Value [Line Items]
Gains recognized in OCI	$ 1,316	$ 0
Losses recognized in OCI	(99)	(450)
Gains recognized from accumulated OCI into net loss		0
Losses recognized from accumulated OCI into net loss	$ (194)	$ (320)