TRANSACTIONS WITH AFFILIATES AND AFFILIATED ENTITIES - Schedule of Affiliate Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Due to affiliates	$ 79,624		$ 79,624		$ 47,348
Management fees	14,187	$ 10,536	41,447	$ 30,552
Incentive compensation	19,491	7,075	72,123	13,200
Manager
Related Party Transaction [Line Items]
Management fees	4,734		4,734		3,689
Incentive compensation	72,123		72,123		42,197
Expense reimbursements and other	2,767		2,767		1,462
Due to affiliates	79,624		79,624		$ 47,348
Management fees	14,187	10,536	41,447	30,552
Incentive compensation	19,491	7,075	72,123	13,200
Expense reimbursements	125	125	375	375
Total payments to affiliate	$ 33,803	$ 17,736	$ 113,945	$ 44,127