Investments - Summary of Selected Financial Information for JCP Funds (Details) - JCP Funds [Member] - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Total assets	$ 76,555			$ 82,869
Total liabilities	99			73
Total partners’ capital	76,456			82,616
Net increase (decrease) in net assets resulting from operations	$ (7,886)	$ (65,700)	$ (2,947)	$ 6,159	$ (1,751)	$ (24,239)