INVESTMENTS - Equity-method Investments (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)
Assets:
Cash and cash-equivalents	$ 3,285,360	$ 3,285,360
Investments, at fair value	40,995,952	40,995,952
Other assets	2,220,264	2,220,264
Total assets	46,501,576	46,501,576
Liabilities and Capital:
Debt obligations	7,014,441	7,014,441
Other liabilities	2,285,463	2,285,463
Total liabilities	9,299,904	9,299,904
Total capital	37,201,672	37,201,672
Total liabilities and capital	46,501,576	46,501,576
Statements of Operations:
Revenues / investment income	482,265	1,025,099
Interest expense	(41,640)	(80,169)
Other expenses	(217,303)	(437,739)
Net realized and unrealized gain on investments	550,657	838,724
Net income	$ 773,979	$ 1,345,915