Accrued Restructuring and Acquisition Integration Costs (Accrued Restructuring And Integration Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 7,842	$ 3,227	$ 6,931
Acquisition integration costs		(242)	159
Adjustment			6,953
Restructuring charges	(648)	8,926	6,953
Cash utilized	(5,658)	(4,069)	(10,816)
Restructuring reserve, ending balance	1,536	7,842	3,227
Accrued Excess Facilities
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2,823	1,118	6,211
Acquisition integration costs		0	0
Adjustment			1,498
Restructuring charges	(353)	2,405
Cash utilized	(1,139)	(700)	(6,591)
Restructuring reserve, ending balance	1,331	2,823	1,118
Accrued Excess Facilities | Headquarter Facilities
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	138	5,811
Adjustment			(250)
Restructuring charges		0
Cash utilized	0	(138)	(5,423)
Restructuring reserve, ending balance	0	0	138
Accrued Excess Facilities | Acquisition Integration
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	41	56	400
Acquisition integration costs			0
Restructuring charges	(41)
Cash utilized	0	(15)	(344)
Restructuring reserve, ending balance	0	41	56
Accrued Excess Facilities | Restructuring
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2,782	924	0
Adjustment			1,748
Restructuring charges	(312)	2,405
Cash utilized	(1,139)	(547)	(824)
Restructuring reserve, ending balance	1,331	2,782	924
Accrued Severance and Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	5,019	2,109	720
Acquisition integration costs		(242)	159
Adjustment			5,455
Restructuring charges	(295)	6,521
Cash utilized	(4,519)	(3,369)	(4,225)
Restructuring reserve, ending balance	205	5,019	2,109
Accrued Severance and Other | Acquisition Integration
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	11	720
Acquisition integration costs			159
Adjustment			0
Cash utilized	0	(11)	(868)
Restructuring reserve, ending balance	0	0	11
Accrued Severance and Other | Restructuring
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	5,019	2,098	0
Acquisition integration costs		(242)	0
Adjustment			5,455
Restructuring charges	(295)	6,521
Cash utilized	(4,519)	(3,358)	(3,357)
Restructuring reserve, ending balance	$ 205	$ 5,019	$ 2,098