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, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Aug. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Aug. 31, 2017	Aug. 31, 2016
Schedule of Equity Method Investments [Line Items]
Net gains (losses) from our investments in JCP Fund V	$ (1,200)				$ 5,800				$ (9,100)	$ (1,400)
Net increase (decrease) in net assets resulting from operations		$ (552)	$ (19,552)	$ (2,294)		$ 17,137	$ (11,806)	$ (7,886)