SUBSEQUENT EVENT (Details) - $ / shares			3 Months Ended
	Nov. 07, 2016	Oct. 17, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Subsequent Event
Distribution announced per unit (in dollars per unit)			$ 0.700	$ 0.690	$ 0.680	$ 0.670	$ 0.665	$ 0.665	$ 0.665
Subsequent Event
Subsequent Event
Distribution announced per unit (in dollars per unit)		$ 0.70
Distribution paid per unit (in dollars per unit)	$ 0.70