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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 6 Months Ended
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
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 $ 419 $ 919 $ 1,391 $ 482
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 419 919 1,391 482
Fair Value, Measurements, Recurring | Lennar Financial Services | RMF loans held-for-sale        
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]        
Changes in fair value included in revenue 10,737 3,121 24,037 3,634
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 4,715 (231) 10,935 5,822
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 (5,049) 7,988 (33,263) (2,180)
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 (4) 6 (4) 6
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 (787) 5,879 (900) 873
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 $ (885) $ (3,408) $ (1,316) $ 23