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Financial Instruments and Fair Value Disclosures - (Schedule Of Gains And Losses Of Financial Instruments) (Details) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2016
Aug. 31, 2015
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in other comprehensive income (loss), net of tax $ 639 $ (400) $ 1,121 $ (294)
Fair Value, Measurements, Recurring        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in other comprehensive income (loss), net of tax 639 (400) 1,121 (294)
Fair Value, Measurements, Recurring | Lennar Financial Services | Loans held-for-sale        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue (2,808) 2,836 826 (283)
Fair Value, Measurements, Recurring | Lennar Financial Services | Mortgage loan commitments        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue 1,781 (384) 7,603 5,811
Fair Value, Measurements, Recurring | Lennar Financial Services | Forward contracts        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue (362) (3,493) (2,542) 4,238
Fair Value, Measurements, Recurring | Lennar Financial Services | Investments available-for-sale        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue 31 0 37 23
Fair Value, Measurements, Recurring | Rialto | Liability | Interest rate swaps and swap futures        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue (133) (4,740) 740 (4,308)
Fair Value, Measurements, Recurring | Rialto | Assets | Credit default swaps        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue $ (1,570) $ 3,466 $ (1,547) $ 2,641