Accrued Restructuring and Excess Facilities Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	May 31, 2012	May 31, 2012	May 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance		$ 7,842
Restructuring adjustment	(400)	(519)	(33)
Adjustment to acquisition integration costs		(253)
Cash Utilized		(5,107)
Ending Balance	1,963	1,963
Excess Acquisition Integration
Restructuring Cost and Reserve [Line Items]
Beginning Balance		41
Adjustment to acquisition integration costs		(3)
Ending Balance	38	38
Accrued Facilities Restructuring
Restructuring Cost and Reserve [Line Items]
Beginning Balance		2,782
Restructuring adjustment		(32)
Adjustment to acquisition integration costs		(420)
Cash Utilized		(806)
Ending Balance	1,524	1,524
Accrued Severance and Other
Restructuring Cost and Reserve [Line Items]
Beginning Balance		5,019
Restructuring adjustment		(487)
Adjustment to acquisition integration costs		170
Cash Utilized		(4,301)
Ending Balance	$ 401	$ 401