Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Nov. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership	$ 152,450	$ 137,849	[1]
Investment in life settlements		1,297
Investment fair value	152,450	139,146
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership	0	0
Investment in life settlements		0
Investment fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership	0	0
Investment in life settlements		0
Investment fair value	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership	152,450	137,849
Investment in life settlements		1,297
Investment fair value	$ 152,450	$ 139,146

[1] Derived from audited consolidated financial statements.