Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	9 Months Ended
Aug. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Historical period used in expected losses projection	8 years
Forecast period used in estimating expected credit losses	2 years
Automobile Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 887.7
Loans, fair value	$ 929.4
Automobile Loan \| 680 and Above \| Receivable Benchmark \| Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage	16.60%
Automobile Loan \| 620 to 679 \| Receivable Benchmark \| Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage	46.60%
Automobile Loan \| Below 620 \| Receivable Benchmark \| Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage	36.80%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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