Other Comprehensive Loss - Changes in Accumulated OCI by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, December 31, 2014			$ (7,352)
Other comprehensive income (loss) before reclassifications			(311)
Change in cash flow hedges reclassed to earnings	$ 172	$ 118	1,001	$ 354
Net current-period other comprehensive income (loss)			690
Balance, September 30, 2015	(6,662)		(6,662)
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, December 31, 2014			(8,485)
Other comprehensive income (loss) before reclassifications			417
Change in cash flow hedges reclassed to earnings			1,001
Net current-period other comprehensive income (loss)			1,418
Balance, September 30, 2015	(7,067)		(7,067)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, December 31, 2014			1,133
Other comprehensive income (loss) before reclassifications			(728)
Change in cash flow hedges reclassed to earnings			0
Net current-period other comprehensive income (loss)			(728)
Balance, September 30, 2015	$ 405		$ 405