Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning			$ (72,114)	$ (62,330)
Total other comprehensive income (loss)	$ 2,457	$ (27,423)	(23,901)	(27,235)
Balance, ending	(61,128)	(64,921)	(61,128)	(64,921)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(11,502)	(43)	14,460	(190)
Other comprehensive income (loss) before reclassifications	2,692	(27,340)	(23,270)	(27,193)
Total other comprehensive income (loss)	2,692	(27,340)	(23,270)	(27,193)
Balance, ending	(8,810)	(27,383)	(8,810)	(27,383)
Derivative Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(832)		(436)	(41)
Other comprehensive income (loss) before reclassifications	(193)	(83)	716	(42)
Amounts reclassified from accumulated other comprehensive income	(42)		(1,347)
Total other comprehensive income (loss)	(235)	(83)	(631)	(42)
Balance, ending	(1,067)	(83)	(1,067)	(83)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(12,334)	(43)	14,024	(231)
Other comprehensive income (loss) before reclassifications	2,499	(27,423)	(22,554)	(27,235)
Amounts reclassified from accumulated other comprehensive income	(42)		(1,347)
Total other comprehensive income (loss)	2,457	(27,423)	(23,901)	(27,235)
Balance, ending	$ (9,877)	$ (27,466)	$ (9,877)	$ (27,466)