Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- 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.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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EQUITY COMPENSATION (Equity Incentive Plan) (Details) - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014	Jan. 01, 2017
Equity compensation
Equity compensation expense	$ 32,244	$ 69,711	$ 39,065
Options
Equity compensation
Granted (in units)		0	0
Equity compensation expense	16,575	$ 13,848	$ 15,450
Restricted units
Equity compensation
Stock to be settled (in units)		7,999,669
Equity compensation expense	14,035	$ 54,339	21,894
Phantom units
Equity compensation
Equity compensation expense	$ 1,634	$ 1,524	$ 1,721
Ares Management L.P
Equity compensation
Total number of units available for grant under the Equity Incentive Plan		26,284,165			31,686,457
IPO \| Options
Equity compensation
Granted (in units)				24,835,227
IPO \| Restricted units
Equity compensation
Stock to be settled (in units)				4,936,051
IPO \| Phantom units
Equity compensation
Stock to be settled (in units)				686,395