Accumulated Other Comprehensive Gain (Loss) - Components of Accumulated Other Comprehensive Gain Loss (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 2,496
Change in other comprehensive gain (loss) before reclassifications, after tax of $2,638 and $6	(4,894)
Reclassification adjustments for items included in Net Income, after tax of $(1,033) and $19	1,772
Ending balance	(626)
FOREX Contracts [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2,350
Change in other comprehensive gain (loss) before reclassifications, after tax of $2,638 and $6	(4,901)
Reclassification adjustments for items included in Net Income, after tax of $(1,033) and $19	1,918
Ending balance	(633)
Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	146
Change in other comprehensive gain (loss) before reclassifications, after tax of $2,638 and $6	7
Reclassification adjustments for items included in Net Income, after tax of $(1,033) and $19	(146)
Ending balance	$ 7