SUBSEQUENT EVENT (Details) (USD $)	3 Months Ended					0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Apr. 14, 2014 Subsequent Event
Subsequent Event
Distribution announced per unit (in dollars per unit)	$ 0.66	$ 0.65	$ 0.65	$ 0.65	$ 0.64	$ 0.66