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Commitments and Contingencies (Changes in the Warranty Liability) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Nov. 30, 2013
Nov. 30, 2012
Loss Contingencies [Line Items]        
Self Insurance Reserve $ 90,416 $ 91,723 $ 92,214 $ 93,349
Expenses Associated with Self Insurance 2,616 [1] 1,809 [1]    
Payments, Net of Recoveries for Self Insurance (4,414) [2] (3,435) [2]    
Changes in the Warranty Liability        
Balance at beginning of period 48,704 47,822    
Warranties issued 3,426 2,766    
Payments (8,711) (8,929)    
Adjustments 0 1,674    
Balance at end of period $ 43,419 $ 43,333    
[1] (a)These expenses are included in selling, general and administrative expenses and are largely offset by contributions from subcontractors participating in the wrap-up policy.
[2] (b)Recoveries are reflected at the time we receive funds from subcontractors and/or their insurers.