CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income (loss)	$ 19,902	$ 4,945	$ (2,688)
Other comprehensive income (loss), before tax
Currency translation adjustments	(517)	251	2,006
Temporary impairment gain (loss) on investment		(194)	435
Total other comprehensive income (loss), before tax	(517)	57	2,441
Tax expense (benefit) allocated to temporary gain (loss) on investments		77	(228)
Other comprehensive income (loss), net of tax	(517)	134	2,213
Comprehensive income (loss)	$ 19,385	$ 5,079	$ (475)