Fair Value Disclosures - Summary of Gains (Losses) Due to Changes in Instrument Specific Credit Risk for Loans and Other Receivables and Loan Commitments Measured at Fair Value under Fair Value Option (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
May 31, 2016 |
May 31, 2015 |
May 31, 2016 |
May 31, 2015 |
|
| Financial instruments owned: | ||||
| Loans and other receivables | $ (10,564) | $ (5,294) | $ (24,901) | $ (2,377) |
| Long-term Debt [Member] | ||||
| Financial Instruments Sold and Long-term Debt | ||||
| Loans, Loan commitments and Changes in instrument specific credit risk | (3,453) | 0 | (3,755) | 0 |
| Other changes in fair value | 3,489 | 0 | 10,305 | 0 |
| Loans [Member] | ||||
| Financial Instruments Sold and Long-term Debt | ||||
| Loans, Loan commitments and Changes in instrument specific credit risk | 407 | 110 | 405 | 238 |
| Loan commitments [Member] | ||||
| Financial Instruments Sold and Long-term Debt | ||||
| Loans, Loan commitments and Changes in instrument specific credit risk | $ 1,173 | $ 5,544 | $ (2,573) | $ (1,622) |