INVESTMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments
Fair Value Investments, Fair Value Disclosure	$ 447,799	$ 427,308
Fair value as a percentage of total investments	100.00%	100.00%
Investments, at cost	$ 369,861	$ 350,811
Private Investment Partnership Interests
Investments
Fair Value Investments, Fair Value Disclosure	$ 393,598	$ 371,475
Fair value as a percentage of total investments	88.00%	87.00%
Investments, at cost	$ 311,187	$ 297,026
Private Investment Partnership Interests | AREA Sponsor Holdings, LLC
Investments
Fair Value Investments, Fair Value Disclosure	$ 38,554	$ 37,275
Fair value as a percentage of total investments	8.60%	8.70%
Private Investment Partnership Interests | ACE II Master Fund L.P.
Investments
Fair Value Investments, Fair Value Disclosure	$ 22,629	$ 22,015
Fair value as a percentage of total investments	5.10%	5.20%
Private Investment Partnership Interests | Ares Corporate Opportunities Fund III, L.P.
Investments
Fair Value Investments, Fair Value Disclosure	$ 116,470	$ 108,506
Fair value as a percentage of total investments	26.00%	25.40%
Private Investment Partnership Interests | Ares Corporate Opportunities Fund IV, L.P.
Investments
Fair Value Investments, Fair Value Disclosure	$ 29,480	$ 30,571
Fair value as a percentage of total investments	6.60%	7.20%
Private Investment Partnership Interests | Ares Enhanced Credit Opportunities Fund, L.P.
Investments
Fair Value Investments, Fair Value Disclosure	$ 25,598	$ 26,073
Fair value as a percentage of total investments	5.70%	6.10%
Private Investment Partnership Interests | Resolution Life L.P.
Investments
Fair Value Investments, Fair Value Disclosure	$ 40,703	$ 40,703
Fair value as a percentage of total investments	9.10%	9.50%
Private Investment Partnership Interests | Other private investment partnership Interests
Investments
Fair Value Investments, Fair Value Disclosure	$ 120,164	$ 106,332
Fair value as a percentage of total investments	26.90%	24.90%
Collateralized Debt Obligations
Investments
Fair Value Investments, Fair Value Disclosure	$ 54,118	$ 55,752
Fair value as a percentage of total investments	12.00%	13.00%
Investments, at cost	$ 58,556	$ 53,669
Collateralized Debt Obligations | Collateralized loan obligations interests
Investments
Fair Value Investments, Fair Value Disclosure	$ 54,118	$ 55,752
Fair value as a percentage of total investments	12.00%	13.00%
Equity securities
Investments
Fair Value Investments, Fair Value Disclosure	$ 83	$ 81
Fair value as a percentage of total investments	0.00%	0.00%
Investments, at cost	$ 118	$ 116
Equity securities | Common stock
Investments
Fair Value Investments, Fair Value Disclosure	$ 83	$ 81
Fair value as a percentage of total investments	0.00%	0.00%