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Financial Instruments and Fair Value Disclosures - (Fair Value Measured On Recurring Basis) (Details) - USD ($)
$ in Thousands
Aug. 31, 2021
Nov. 30, 2020
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Investments available-for-sale $ 41,695 $ 53,497
Lennar Other    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Investments available-for-sale 41,695 53,497
Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Investments available-for-sale 0 0
Fair Value, Measurements, Recurring | Level 1 | Lennar Other    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Investments in equity securities 1,085,571 0
Fair Value, Measurements, Recurring | Level 3 | Lennar Other    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Investments available-for-sale 41,695 53,497
Fair Value, Measurements, Recurring | Level 3 | Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Mortgage servicing rights 2,382 2,113
Residential | Fair Value, Measurements, Recurring | Loans held-for-sale | Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Aggregate principal balance 1,103,647 1,232,548
Aggregate fair value of loans (below) in excess of principal balance 37,813 63,969
Residential | Fair Value, Measurements, Recurring | Level 2 | Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Loans held for sale 1,141,460 1,296,517
Commercial | Fair Value, Measurements, Recurring | Loans held-for-sale | Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Aggregate principal balance 116,010 194,362
Aggregate fair value of loans (below) in excess of principal balance (2,881) (774)
Commercial | Fair Value, Measurements, Recurring | Level 3 | Financial Services    
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]    
Loans held for sale $ 113,129 $ 193,588