RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Due from Affiliates	$ 768,887	$ 717,399
Due to Affiliates	298,944	286,098
Portfolio Companies
Related Party Transaction [Line Items]
Due from Affiliates	139,561	120,391
Unconsolidated Investment Funds
Related Party Transaction [Line Items]
Due from Affiliates	626,356	594,184
Due to Affiliates	112,417	154,810
Related Entities
Related Party Transaction [Line Items]
Due from Affiliates	2,970	2,824
Due to KKR Holdings in connection with the tax receivable agreement
Related Party Transaction [Line Items]
Due to Affiliates	$ 186,527	$ 131,288