Derivative Instruments - Schedule of Gain (Loss) Recognized on Derivative Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments [Line Items]
Unrealized gain (loss) on derivative instruments recorded in other comprehensive income (loss), net of taxes	$ 271	$ (31)	$ 936	$ 72
Cross-Currency Swap [Member]
Derivative Instruments [Line Items]
Unrealized gain (loss) on derivative instruments recorded in other comprehensive income (loss), net of taxes	267	$ (31)	$ 936	$ 72
Warrants [Member]
Derivative Instruments [Line Items]
Unrealized gain (loss) on derivative instruments recorded in other comprehensive income (loss), net of taxes	$ 4