Investments - Summary of Selected Financial Information for JCP Funds (Details) - JCP Funds [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Total assets	$ 64,725	$ 76,555
Total liabilities	74	99
Total partners' capital	64,651	76,456
Net increase (decrease) in net assets resulting from operations	$ (11,806)	$ (7,886)	$ 1,478	$ (65,700)