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, 2019	Mar. 31, 2019	Dec. 31, 2018	May 31, 2018	Mar. 31, 2018	Dec. 31, 2017	May 31, 2019	May 31, 2018
Schedule of Equity Method Investments [Line Items]
Net gains from our investments in JCP Fund V	$ 3,800			$ 3,000			$ 600	$ 9,800
Net increase (decrease) in net assets resulting from operations		$ (1,169)	$ (8,412)		$ 8,463	$ 19,712