Summary of Significant Accounting Policies - Schedule of Components of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 3,503
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	248	(279)	263
Foreign currency translation adjustment	(4,133)	(1,708)	1,131
Ending Balance	(382)	3,503
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	3,651	5,359
Foreign currency translation adjustment	(4,133)	(1,708)
Ending Balance	(482)	3,651
Change in Fair Value [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(148)	131
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	248	(279)
Ending Balance	100	(148)
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	3,503	5,490
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	248	(279)	263
Foreign currency translation adjustment	(4,133)	(1,708)	1,131
Ending Balance	$ (382)	$ 3,503	$ 5,490