Commitments And Contingencies (Summary Of Contractual Commitments) (Details) (USD $)	Nov. 30, 2011
Commitments And Contingencies [Line Items]
Debt principal, Total	$ 68,108,000	[1]
Debt principal, 2012	32,397,000	[1]
Debt principal, 2013	35,711,000	[1]
Debt interest, Total	3,319,000
Debt interest, 2012	2,036,000
Debt interest, 2013	1,283,000
Operating leases, Total	30,766,000
Operating leases, 2012	9,441,000
Operating leases, 2013	7,433,000
Operating leases, 2014	5,339,000
Operating leases, 2015	3,153,000
Operating leases, 2016	1,911,000
Operating leases, Thereafter	3,489,000
Operating commitments, Total	102,193,000
Operating commitments, 2012	43,874,000
Operating commitments, 2013	44,427,000
Operating commitments, 2014	5,339,000
Operating commitments, 2015	3,153,000
Operating commitments, 2016	1,911,000
Operating commitments, Thereafter	3,489,000
Gross lease obligations	846,000
Gross lease obligations, 2012	741,000
Gross lease commitments, 2013	105,000
Committed sublease income, Total	(433,000)
Committed sublease income, 2012	(366,000)
Committed sublease income, 2013	(67,000)
Restructuring-related commitments, Total	413,000
Restructuring-related commitments, 2012	375,000
Restructuring-related commitments, 2013	38,000
Total commitments	102,606,000
Total commitments, 2012	44,249,000
Total commitments, 2013	44,465,000
Total commitments 2014	5,339,000
Total commitments, 2015	3,153,000
Total commitments, 2016	1,911,000
Total commitments, Thereafter	3,489,000
Credit Agreement [Member]
Commitments And Contingencies [Line Items]
Revolving credit facility amount outstanding	$ 30,000,000

[1] For fiscal year 2012, the debt principle includes $30.0 million outstanding balance under the credit facility that is shown as long-term debt on the balance sheet due to the Company's intent and ability to refinance on a long-term basis under the Amended Credit Agreement.