Accumulated Other Comprehensive Loss - Components of Changes in Accumulated Other Comprehensive Loss (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]
Beginning Balance			$ (382)
Unrealized gain on derivative instruments, net of tax	$ (706)	$ 112	230	$ 184
Foreign currency translation adjustment	(365)	$ (3,302)	(3,666)	$ (2,728)
Ending Balance	(3,818)		(3,818)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(482)
Foreign currency translation adjustment			(3,666)
Ending Balance	(4,148)		(4,148)
Change in Fair Value [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			100
Unrealized gain on derivative instruments, net of tax			230
Ending Balance	330		330
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(382)
Unrealized gain on derivative instruments, net of tax			230
Foreign currency translation adjustment			(3,666)
Ending Balance	$ (3,818)		$ (3,818)