Stock-Based Compensation (Additional Information For RSU's Under The 2007 Plan) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Restricted Stock Units outstanding, beginning balance	404
Granted, Shares	196
Released, Shares	91
Forfeited, Shares	(14)
Restricted Stock Units outstanding, ending balance	495
Vested and expected to vest	438
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Restricted Stock Units outstanding, beginning balance	404	359	187
Granted, Shares	196	149	204
Released, Shares	(91)	(95)	(22)
Forfeited, Shares	(14)	(9)	(10)
Restricted Stock Units outstanding, ending balance	495	404	359
Vested and expected to vest	438	343	317