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Operating and Reporting Segments (Commercial Mortgage-Backed Securities) (Details) - USD ($)
$ in Thousands
May 31, 2021
Nov. 30, 2020
Segment Reporting Information [Line Items]    
Debt Securities, Held-to-maturity $ 162,919 $ 164,230
Outstanding debt, net of debt issuance costs 6,824,433 7,421,583
Financial Services    
Segment Reporting Information [Line Items]    
Debt Securities, Held-to-maturity 162,919 164,230
Outstanding debt, net of debt issuance costs 928,185 1,463,919
Financial Services | Financing Agreement to Purchase Commercial Mortgage Backed Securities | Secured Debt    
Segment Reporting Information [Line Items]    
Outstanding debt, net of debt issuance costs $ 152,396 $ 153,505
Incurred interest rate 3.40% 3.40%
CMBS | Financial Services    
Segment Reporting Information [Line Items]    
Debt Securities, Held-to-maturity $ 162,919 $ 164,230