Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ (710)	$ (1,450)
Net unrealized gain on investments, net of taxes of $(552) at September 30, 2012 and $(14) at December 31, 2011	1,193	191
Total accumulated other comprehensive income (loss)	483	(1,259)
Accumulated other comprehensive income loss available for sale securities adjustment tax	$ (552)	$ (14)