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Schedule of Tax Effects Allocated to Each Component of Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Components Of Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustment	$ 5,005	$ (6,645)
Unrealized (loss) gain on cash flow hedging instruments	(735)	207
Income tax benefit (expense)	199	(56)
Unrealized (loss) gain on cash flow hedging instruments, net of tax	(536)	151
Reclassification of (gain) loss on cash flow hedging instruments into earnings	(375)	1,031
Income tax expense (benefit)	101	(278)
Reclassification of (gain) loss on cash flow hedging instruments into earnings, net of tax	(274)	753
Other comprehensive income (loss)	$ 4,195	$ (5,741)

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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