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Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
May 31, 2012
Nov. 30, 2011
Other Assets    
Cash surrender value of insurance contracts $ 61,933 $ 59,718
Debt issuance costs 10,032 4,219
Property and equipment, net 7,617 7,801
Prepaid expenses 4,463 2,214
Net deferred tax assets 1,152 1,152
Total $ 85,197 $ 75,104