Accrued Restructuring And Excess Facilities Costs (Accrued Restructuring And Excess Facilities Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended
	Feb. 28, 2012	Feb. 28, 2011	Feb. 28, 2012 Excess Acquisition Integration [Member]	Nov. 30, 2011 Excess Acquisition Integration [Member]	Feb. 28, 2012 Accrued Facilities Restructuring [Member]	Feb. 28, 2012 Accrued Severance And Other [Member]
Restructuring Cost and Reserve [Line Items]
As of November 30, 2011	$ 7,842		$ 41	$ 41	$ 2,782	$ 5,019
Restructuring adjustment	(119)	(33)				(119)
Adjustment to acquisition integration costs	(96)				(293)	197
Cash Utilized	(4,339)				(451)	(3,888)
As of February 28, 2012	$ 3,288		$ 41	$ 41	$ 2,038	$ 1,209