RELATED PARTY TRANSACTIONS (Details) - Services company - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related party transaction
Distributions paid to related party	$ 3.2	$ 3.2	$ 3.7
Limited Partners
Related party transaction
LP Units owned by related party (in shares)	0.7
Percentage of LP Units owned	0.50%