DERIVATIVES AND HEDGING - Summary of Net Forward Currency Sell Contracts Under Freestanding Derivatives (Details) - Oaktree Capital Group Excluding Consolidated Funds - Not Designated as Hedging Instrument - Foreign Currency Forward Sell Contracts € in Thousands, ¥ in Thousands, SFr in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2017 CHF (SFr)	Jun. 30, 2017 JPY (¥)	Jun. 30, 2017 EUR (€)	Dec. 31, 2016 JPY (¥)	Dec. 31, 2016 EUR (€)
Derivative [Line Items]
Contract amount	$ 426,549	$ 396,924
Market Value in U.S. Dollars	436,343	388,587
Net Unrealized Appreciation (Depreciation)	(9,794)	8,337
Euro
Derivative [Line Items]
Contract amount	301,904	271,848			€ 270,700		€ 242,100
Market Value in U.S. Dollars	312,802	257,652
Net Unrealized Appreciation (Depreciation)	(10,898)	14,196
USD
Derivative [Line Items]
Contract amount	63,920	72,565
Market Value in U.S. Dollars	63,088	78,143
Net Unrealized Appreciation (Depreciation)	832	(5,578)
CHF
Derivative [Line Items]
Contract amount	5,418		SFr 5,300
Market Value in U.S. Dollars	5,590
Net Unrealized Appreciation (Depreciation)	(172)
Japanese Yen
Derivative [Line Items]
Contract amount	55,307	52,511		¥ 6,145,000		¥ 6,150,000
Market Value in U.S. Dollars	54,863	52,792
Net Unrealized Appreciation (Depreciation)	$ 444	$ (281)