Investments - Summary of Selected Financial Information for JCP Fund V (Details) - JCP Fund V - USD ($) $ in Thousands	3 Months Ended								9 Months Ended
	Aug. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Aug. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Aug. 31, 2019	Aug. 31, 2018
Schedule of Equity Method Investments [Line Items]
Net gains (losses) from our investments in JCP Fund V	$ (2,500)				$ 300				$ (1,900)	$ 10,100
Net increase (decrease) in net assets resulting from operations		$ (7,174)	$ (1,169)	$ (8,412)		$ 1,663	$ 8,463	$ 19,712