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Other Assets (Details) - USD ($)
$ in Thousands
Aug. 31, 2018
Nov. 30, 2017
Other Assets [Abstract]    
Cash surrender value of corporate-owned life insurance contracts $ 75,893 $ 75,236
Property and equipment, net 21,695 19,521
Prepaid expenses 9,437 5,360
Debt issuance costs associated with unsecured revolving credit facility 1,894 2,381
Total $ 108,919 $ 102,498