CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ 21,868	$ 10,108	$ (5,891)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on securities	31	93	(338)
Less: reclassification adjustment for gains included in net loss			(237)
Foreign currency translation adjustments	1,495	296	149
Total other comprehensive income (loss)	1,526	389	(426)
Comprehensive income (loss)	$ 23,394	$ 10,497	$ (6,317)