FAIR VALUE (Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Consolidated Funds
Assets, at fair value
Collateralized loan obligations and other fixed income	$ 9,647,115	$ 8,319,551
Common stock and other equity securities	45,881	112,384
Partnership interests	312,636	296,012
Total investments, at fair value	10,005,632	8,727,947
Derivatives-foreign exchange contracts	1,599
Total derivative assets, at fair value	10,007,231	8,728,614
Liabilities, at fair value
Derivative liabilities		(4,776)
Loan obligations of CLOs	(9,228,687)	(7,973,748)
Total liabilities, at fair value	(9,228,884)	(7,978,524)
Consolidated Funds | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts		667
Liabilities, at fair value
Derivative liabilities		(670)
Consolidated Funds | Derivatives-asset swaps-other
Assets, at fair value
Derivatives-foreign exchange contracts	1,599
Liabilities, at fair value
Derivative liabilities	(197)	(4,106)
Consolidated Funds | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income		44,435
Consolidated Funds | Bonds
Assets, at fair value
Collateralized loan obligations and other fixed income	299,459	212,376
Consolidated Funds | Loans
Assets, at fair value
Collateralized loan obligations and other fixed income	9,347,656	8,062,740
Consolidated Funds | Level I
Assets, at fair value
Collateralized loan obligations and other fixed income	0	0
Common stock and other equity securities	3,622	26,396
Partnership interests	0	0
Total investments, at fair value	3,622	26,396
Derivatives-foreign exchange contracts	0
Total derivative assets, at fair value	3,622	26,396
Liabilities, at fair value
Derivative liabilities		0
Loan obligations of CLOs	0	0
Total liabilities, at fair value	0	0
Consolidated Funds | Level I  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts		0
Liabilities, at fair value
Derivative liabilities		0
Consolidated Funds | Level I  | Derivatives-asset swaps-other
Assets, at fair value
Derivatives-foreign exchange contracts	0
Liabilities, at fair value
Derivative liabilities	0	0
Consolidated Funds | Level I  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income		0
Consolidated Funds | Level I  | Bonds
Assets, at fair value
Collateralized loan obligations and other fixed income	0	0
Consolidated Funds | Level I  | Loans
Assets, at fair value
Collateralized loan obligations and other fixed income	0	0
Consolidated Funds | Level II
Assets, at fair value
Collateralized loan obligations and other fixed income	9,060,828	7,980,415
Common stock and other equity securities	0	0
Partnership interests	0	0
Total investments, at fair value	9,060,828	7,980,415
Derivatives-foreign exchange contracts	0
Total derivative assets, at fair value	9,060,828	7,981,082
Liabilities, at fair value
Derivative liabilities		(670)
Loan obligations of CLOs	(9,228,687)	(7,973,748)
Total liabilities, at fair value	(9,228,687)	(7,974,418)
Consolidated Funds | Level II  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts		667
Liabilities, at fair value
Derivative liabilities		(670)
Consolidated Funds | Level II  | Derivatives-asset swaps-other
Assets, at fair value
Derivatives-foreign exchange contracts	0
Liabilities, at fair value
Derivative liabilities	0	0
Consolidated Funds | Level II  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income		44,435
Consolidated Funds | Level II  | Bonds
Assets, at fair value
Collateralized loan obligations and other fixed income	299,459	207,966
Consolidated Funds | Level II  | Loans
Assets, at fair value
Collateralized loan obligations and other fixed income	8,761,369	7,728,014
Consolidated Funds | Level III
Assets, at fair value
Collateralized loan obligations and other fixed income	586,287	339,136
Common stock and other equity securities	42,259	85,988
Partnership interests	312,636	296,012
Total investments, at fair value	941,182	721,136
Derivatives-foreign exchange contracts	1,599
Total derivative assets, at fair value	942,781	721,136
Liabilities, at fair value
Derivative liabilities		(4,106)
Loan obligations of CLOs	0	0
Total liabilities, at fair value	(197)	(4,106)
Consolidated Funds | Level III  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts		0
Liabilities, at fair value
Derivative liabilities		0
Consolidated Funds | Level III  | Derivatives-asset swaps-other
Assets, at fair value
Derivatives-foreign exchange contracts	1,599
Liabilities, at fair value
Derivative liabilities	(197)	(4,106)
Consolidated Funds | Level III  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income		0
Consolidated Funds | Level III  | Bonds
Assets, at fair value
Collateralized loan obligations and other fixed income	0	4,410
Consolidated Funds | Level III  | Loans
Assets, at fair value
Collateralized loan obligations and other fixed income	586,287	334,726
Ares Management L.P
Assets, at fair value
Common stock and other equity securities	15,636	15,747
Partnership interests	5,607	36,824
Total investments, at fair value	88,598	121,754
Total derivative assets, at fair value	93,317	125,777
Liabilities, at fair value
Derivative liabilities		(113)
Total liabilities, at fair value	(128)	(113)
Ares Management L.P | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts	4,719	4,023
Liabilities, at fair value
Derivative liabilities	(128)
Ares Management L.P | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income	67,355	69,183
Ares Management L.P | Level I
Assets, at fair value
Common stock and other equity securities	0	0
Partnership interests	0	0
Total investments, at fair value	0	0
Total derivative assets, at fair value	0	0
Liabilities, at fair value
Derivative liabilities		0
Total liabilities, at fair value	0	0
Ares Management L.P | Level I  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts	0	0
Liabilities, at fair value
Derivative liabilities	0
Ares Management L.P | Level I  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income	0	0
Ares Management L.P | Level II
Assets, at fair value
Common stock and other equity securities	932	1,043
Partnership interests	0	0
Total investments, at fair value	932	1,043
Total derivative assets, at fair value	5,651	5,066
Liabilities, at fair value
Derivative liabilities		(113)
Total liabilities, at fair value	(128)	(113)
Ares Management L.P | Level II  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts	4,719	4,023
Liabilities, at fair value
Derivative liabilities	(128)
Ares Management L.P | Level II  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income	0	0
Ares Management L.P | Level III
Assets, at fair value
Common stock and other equity securities	14,704	14,704
Partnership interests	2,575	35,192
Total investments, at fair value	84,634	119,079
Total derivative assets, at fair value	84,634	119,079
Liabilities, at fair value
Derivative liabilities		0
Total liabilities, at fair value	0	0
Ares Management L.P | Level III  | Derivatives-foreign exchange contracts
Assets, at fair value
Derivatives-foreign exchange contracts	0	0
Liabilities, at fair value
Derivative liabilities	0
Ares Management L.P | Level III  | Investments in CLO warehouse
Assets, at fair value
Collateralized loan obligations and other fixed income	67,355	69,183
Ares Management L.P | Investments Measured at NAV
Assets, at fair value
Partnership interests	3,032	1,632
Total investments, at fair value	3,032	1,632
Total derivative assets, at fair value	$ 3,032	$ 1,632