SEGMENT REPORTING (Revenue, Expenses and Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment revenues
Other fees	$ 0	$ 0
Total revenues	266,089	244,244
Segment expenses
Total expenses	206,283	491,467
Segment other income
Total other income	2,240	56,635
Operating segment
Segment revenues
Performance income—realized	23,107	8,805
Performance income—unrealized	35,118	49,261
Segment expenses
Total performance related compensation - realized	14,869	5,301
Segment other income
Investment income (loss)—unrealized	(5,574)	9,534
Ares Management L.P
Segment revenues
Management fees	189,515	172,045
Other fees	12,465	14,440
Total revenues	266,089	244,244
Segment expenses
Compensation and benefits	134,639	124,339
General, administrative and other expenses	44,450	47,338
Segment other income
Interest and other investment income (expense)	54,129	52,007
Ares Management L.P | Operating segment
Segment revenues
Management fees	196,826	176,781
Other fees	6,073	4,834
Performance income—realized	23,107	8,805
Performance income—unrealized	35,118	49,261
Total revenues	261,124	239,681
Segment expenses
Compensation and benefits	77,118	74,657
General, administrative and other expenses	16,102	14,970
Total performance related compensation - realized	14,869	5,301
Total performance fee compensation - unrealized	11,009	35,401
Total expenses	119,098	130,329
Segment other income
Investment income (loss)—realized	4,792	2,680
Investment income (loss)—unrealized	(5,651)	12,691
Interest and other investment income (expense)	3,542	(48)
Interest expense	(6,321)	(4,403)
Total other income	$ (3,638)	$ 10,920