Investments - Summary of Selected Financial Information for JCP Fund V (Details) - JCP Fund V - USD ($) $ in Thousands	3 Months Ended			9 Months Ended			12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Schedule of Equity Method Investments [Line Items]
Net gains (losses) from our investments in JCP Fund V							$ (5,700)	$ 12,100	$ (10,700)
Total assets				$ 63,248	$ 90,731
Total liabilities				76	76
Total partners’ capital				63,172	90,655
Net increase (decrease) in net assets resulting from operations	$ (8,412)	$ 19,712	$ (2,294)	$ (19,070)	$ 15,252	$ (24,630)