Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Aug. 16, 2019	Feb. 29, 2020	Feb. 28, 2019	Dec. 11, 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, at estimated fair value (Note 11)		$ 143,201			$ 137,849	[1]
Change in fair value of investment in deconsolidated subsidiaries		$ 0	$ (33,965)
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%
5.0% Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt interest rate			5.00%
5.0% Convertible Notes | Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt interest rate		5.00%		5.00%					5.00%
WE Investment | Consolidated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage		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%
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%
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%
Subsidiary in Bankruptcy Proceedings
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in limited partnership, at estimated fair value (Note 11)		$ 95,500	$ 95,541		$ 128,800		$ 128,795
Change in fair value of investment in deconsolidated subsidiaries			$ (33,965)
Lamington | WE Investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage	27.50%
Investment in limited partnership, at estimated fair value (Note 11)	$ 138,900	$ 143,200
Lamington | WE Investment | Consolidated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment ownership percentage	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%
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		0.1457
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		0.1457
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
Revolving Credit Facility | CLMG | Palomino | Class A Interests
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of limited partnership interest	366,200
Revolving Credit Facility | CLMG | Palomino | Class D Interests
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchase price of acquired equity interest allocated to Class D	8,000
Annual amount guaranteed to majority owners of limited partnership	$ 2,000
Internal rate of return guaranteed to majority owner of partnership investment	11.00%

[1] Derived from audited consolidated financial statements.