Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 16, 2019	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019	Aug. 16, 2019	Nov. 30, 2019		Nov. 30, 2018	Jul. 28, 2017	Apr. 18, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership		$ 152,450		$ 152,450			$ 137,849	[1]
Change in fair value of investment in deconsolidated subsidiaries (Notes 4 & 16)		0	$ 90,710	0	$ 37,941
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership		$ 152,450		$ 152,450			$ 137,849
8.5% Senior Secured Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt interest rate		8.50%	8.50%	8.50%	8.50%		8.50%	[1]		8.50%
5.0% Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt interest rate		5.00%	5.00%	5.00%	5.00%		5.00%	[1]			5.00%
WE Investment | Consolidated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage		27.50%		27.50%
Class A Interests | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Internal rate of return guaranteed to majority owner of partnership investment	11.00%					11.00%
Class A Interests | For the first 3 years | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of limited partnership interest	$ 8,000
Period for distribution of proceeds from limited partnership interest	3 years
Class A Interests | For the subsequent 7 years | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of limited partnership interest	$ 4,000
Period for distribution of proceeds from limited partnership interest	7 years
Class D Interests | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Internal rate of return guaranteed to majority owner of partnership investment	11.00%					11.00%
Class B Interests | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period for distribution of proceeds from limited partnership interest	8 years
Internal rate of return guaranteed to majority owner of partnership investment	11.00%					11.00%
Subsidiary in Bankruptcy Proceedings
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership	$ 166,736					$ 166,736			$ 128,795
Change in fair value of investment in deconsolidated subsidiaries (Notes 4 & 16)						$ 37,941
Lamington | WE Investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage	27.50%					27.50%
Investment in limited partnership	$ 138,900	$ 152,500		$ 152,500		$ 138,900	$ 137,800
Lamington | WE Investment | Consolidated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage	27.50%					27.50%
Lamington | Class B Interests | WE Investment | Consolidated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage	27.50%					27.50%
White Eagle | WE Investment | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership measurement input		0.1404		0.1404
White Eagle | WE Investment | Consolidated | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership measurement input		0.1404		0.1404
White Eagle | Class A Interests | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of limited partnership interest	$ 366,200
White Eagle | Class D Interests | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of limited partnership interest	$ 8,000
Palomino | White Eagle | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of equity interest sold	72.50%					72.50%

[1] Derived from audited consolidated financial statements.