EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Mar. 02, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
AOG Units (in units)		212,341,070		212,341,070		211,243,045
Direct Ownership Interest		100.00%		100.00%		100.00%
Dividend rate, percentage				7.00%
Redemption price (dollars per unit)		$ 25.00		$ 25.00
Fees related to secondary offering	$ 0.7
Preferred Equity
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Issuance of common units (in units)		12,400,000		12,400,000		12,400,000
Ares Owners Holding L.P.
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
AOG Units (in units)		117,710,070		117,710,070		117,928,313
Direct Ownership Interest		55.43%		55.43%		55.82%
Daily Average Ownership		55.53%	56.25%	55.63%	56.26%
Affiliate of Alleghany Corporation
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
AOG Units (in units)		12,500,000		12,500,000		12,500,000
Direct Ownership Interest		5.89%		5.89%		5.92%
Daily Average Ownership		5.89%	5.87%	5.90%	5.87%
ADIA
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Number of units sold (in units)	7,500,000
Ares Management, L.P.
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
AOG Units (in units)		82,131,000		82,131,000		80,814,732
Direct Ownership Interest		38.68%		38.68%		38.26%
Daily Average Ownership		38.58%	37.88%	38.47%	37.87%