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, 2018	Nov. 30, 2017
Financial instruments owned:
Loans and other receivables	$ 896,470	$ 752,076
Loans and other receivables on nonaccrual status and/or 90 days or greater past due	167,355	159,462
Long-term debt and short-term borrowings	89,345	32,839
Loans and other receivables 90 days or greater past due	$ 33,700	$ 38,700