v2.4.0.6

Supplemental Disclosures of Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Non-cash financing and investing activities [Abstract]
Unrealized gain (loss) on foreign currency exchange contracts	$ (782)	$ 1,406
Unrealized gain (loss) on available-for-sale securities	74	162
Property and equipment	$ (30)	$ (21)

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