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Schedule of Tax Effects Allocated to Each Component of Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components Of Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustment	$ (11,996)	$ 5,073	$ (12,648)	$ (8,367)
Unrealized (loss) gain on available-for-sale securities	(9)	27	(21)	24
Income tax benefit (expense)	4	(9)	8	(9)
Unrealized (loss) gain on available-for-sale securities, net of tax	(5)	18	(13)	15
Other comprehensive (loss) income	$ (12,001)	$ 5,091	$ (12,661)	$ (8,352)

X

- Definition

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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