SUBSEQUENT EVENTS (Details) - Subsequent event	1 Months Ended
	Apr. 30, 2018 $ / shares shares
Subsequent events
Quarterly distribution declared (in dollars per unit)	$ 0.28
Preferred equity quarterly distribution (in dollars per unit)	$ 0.4375
Underwriting | Ares Management L.P
Subsequent events
Number of units sold (in units) | shares	1,130,000