Fair Value Disclosures - Summary of Amount by Which Contractual Principal Exceeds Fair Value for Loans and Other Receivables Measured at Fair Value under Fair Value Option (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Nov. 30, 2016
Financial instruments owned:
Loans and other receivables	$ 663,618	$ 1,325,938
Loans and other receivables on nonaccrual status and/or greater than 90 days past due	159,000	205,746
Long-term debt and short-term borrowings	9,725	20,202
Loans and other receivables greater than 90 days past due	$ 48,300	$ 64,600