EQUITY COMPENSATION (Phantom Units) (Details) - Phantom units $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Units
Balance at the beginning of the period (in units) | shares	266,138
Vested (in units) | shares	0
Forfeited (in units) | shares	(1,099)
Balance at the end of the period (in units) | shares	265,039
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit)	$ 19.00
Vested (in dollars per unit)	0.00
Forfeited (in dollars per unit)	19.00
Balance at the end of the period (in dollars per unit)	19.00
Share price (USD per share)	$ 18.95
Unrecognized compensation expenses | $	$ 3.5
Weighted average period of compensation expense expected to be recognized	2 years 1 month 2 days