Related Party Transactions - Schedule of Related Party Transactions (Details) - Manager - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of Investments, Other than Investments in Related Parties
Total incurred costs, originally paid by the Manager	$ 2,690	$ 1,274	$ 5,039	$ 4,373
Incurred Costs, Prepaid or Expensed
Summary of Investments, Other than Investments in Related Parties
Total incurred costs, originally paid by the Manager	2,668	1,274	5,017	4,373
Incurred Costs, Charged Against Equity as a Cost of Raising Capital
Summary of Investments, Other than Investments in Related Parties
Total incurred costs, originally paid by the Manager	$ 22	$ 0	$ 22	$ 0