Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013	Nov. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 68,345	$ 68,997
Accumulated Amortization	(63,771)	(63,878)
Net Book Value	4,574	5,119
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	42,231	42,520
Accumulated Amortization	(40,108)	(40,066)
Net Book Value	2,123	2,454
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,114	26,477
Accumulated Amortization	(23,663)	(23,812)
Net Book Value	$ 2,451	$ 2,665