Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized gain on investments, net of tax of $(418) at December 31, 2012 and $(14) at December 31, 2011	$ 714	$ 191
Foreign currency translation adjustments	(2,354)	(1,450)
Accumulated other comprehensive loss	(1,640)	(1,259)
Accumulated other comprehensive income loss available for sale securities adjustment tax	$ (418)	$ (14)