Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ (4,480)	$ (1,450)
Net unrealized gain on investments, net of taxes of $(127) at June 30, 2012 and $(14) at December 31, 2011	372	191
Total accumulated other comprehensive income (loss)	(4,108)	(1,259)
Accumulated other comprehensive income loss available for sale securities adjustment tax	$ (127)	$ (14)