SEGMENT REPORTING (Revenue Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue adjustment
Total segment revenue	$ 272,635	$ 289,102	$ 864,179	$ 847,241
Ares Management L.P
Revenue adjustment
Total revenues	466,490	240,777	1,328,509	711,029
Operating segment \| Ares Management L.P
Revenue adjustment
Performance (income) loss-unrealized	(181,174)	37,999	(426,411)	127,224
Total segment revenue	272,635	289,102	864,179	847,241
Reconciling items
Revenue adjustment
Principal investment income	(13,865)	7,886	(45,336)	(9,544)
Total segment revenue	(193,855)	48,325	(464,330)	136,212
Reconciling items \| Non-Controlling interest \| Subsidiaries
Revenue adjustment
Total segment revenue	(396)	13	(739)	60
Reconciling items \| Performance income reclass
Revenue adjustment
Performance fee reclass	(27)	795	553	(211)
Management fees \| Ares Management L.P
Revenue adjustment
Total revenues	251,591	204,524	714,096	588,071
Management fees \| Operating segment \| Ares Management L.P
Revenue adjustment
Total revenues	259,978	213,662	739,269	612,792
Management fees \| Consolidated Funds \| Eliminations
Revenue adjustment
Total segment revenue	8,780	9,138	25,928	24,721
Incentive fees \| Ares Management L.P
Revenue adjustment
Total revenues	1,712	872	28,747	13,683
Incentive fees \| Consolidated Funds \| Eliminations
Revenue adjustment
Total revenues	0	0	5,184	4,000
Principal investment income (loss) \| Ares Management L.P
Revenue adjustment
Total revenues	11,389	(7,464)	45,992	(684)
Principal investment income (loss) \| Consolidated Funds \| Eliminations
Revenue adjustment
Total revenues	2,476	(422)	(656)	10,228
Administrative, transaction and other fees
Revenue adjustment
Total revenues	0	0	0	0
Administrative, transaction and other fees \| Ares Management L.P
Revenue adjustment
Total revenues	14,995	10,943	35,866	37,372
Administrative, transaction and other fees \| Reconciling items
Revenue adjustment
Total revenues	$ (9,649)	$ (7,084)	$ (22,853)	$ (20,266)

Represents the amount of unrealized revenue recognized by the entity based on the investment results achieved.

No definition available.

Name:	ares_PerformanceFeesRevenueUnrealized
Namespace Prefix:	ares_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of performance fee unrealized included in revenue reclassified during the period based on the investment results achieved.

+ References

No definition available.

+ Details

Name:	ares_PerformanceFeesUnrealizedIncludedInRevenueReclassified
Namespace Prefix:	ares_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(2))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

+ Details

Name:	us-gaap_NetInvestmentIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingRevenueReconcilingItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ares_AREASponsorHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ManagementServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ares_ConsolidatedFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ManagementServiceIncentiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=ares_PrincipalInvestmentIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_AdministrativeServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: