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, 2015	Nov. 30, 2014
Financial instruments owned:
Loans and other receivables	$ 354,262	$ 403,119
Loans and other receivables greater than 90 days past due	32,867	5,594
Loans and other receivables on nonaccrual status	$ 3,330	$ (22,360)