CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (2,166)	$ (1,822)
Other comprehensive income (loss):
Unrealized gain on available-for-sale securities		964
Reclassification of unrealized gain to a realized gain on available-for-sale securities		(1,557)
Foreign currency translation adjustments	(10,456)	3,433
Total other comprehensive income (loss):	(10,456)	2,840
Comprehensive income (loss)	$ (12,622)	$ 1,018