Other Income (Expense), Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Income (Expense), Net [Abstract]
Foreign currency loss, net	$ (1,157)	$ (2,146)	$ (3,797)
Gain on other investments	1,972	1,433	2,183
Other income, net	904	5	713
Other income (expense), net	$ 1,719	$ (708)	$ (901)