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Homebuilding Senior Notes and Other Debts Payable (Letter of Credit Facilities) (Details) - USD ($)
$ in Thousands
Aug. 31, 2020
Nov. 30, 2019
Performance letters of credit    
Line of Credit Facility [Line Items]    
Letters of credit outstanding $ 770,527 $ 715,793
Financial letters of credit    
Line of Credit Facility [Line Items]    
Letters of credit outstanding 258,703 184,075
Surety bonds    
Line of Credit Facility [Line Items]    
Letters of credit outstanding 3,041,946 2,946,167
Anticipated future costs primarily for site improvements related to performance surety bonds    
Line of Credit Facility [Line Items]    
Letters of credit outstanding $ 1,498,173 $ 1,427,145