Investments - Summary of Selected Financial Information for JCP Fund V (Details) - JCP Fund V - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
May 31, 2020	Mar. 31, 2020	Dec. 31, 2019	May 31, 2019	Mar. 31, 2019	Dec. 31, 2018	May 31, 2020	May 31, 2019
Schedule of Equity Method Investments [Line Items]
Net gains (losses) from our investments in JCP Fund V	$ (7,000)			$ 3,800			$ (5,500)	$ 600
Net decrease in net assets resulting from operations		$ (19,893)	$ (1,397)		$ (1,169)	$ (8,412)

Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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