NET INCOME PER LIMITED PARTNER UNIT (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income	$ 7,710	$ 3,619	$ 9,289	$ 7,512
General partner interest in net income	241	96	344	189
Preferred interest in net income	5,391	5,391	10,782	10,782
Income (loss) available to limited partners	$ 2,078	$ (1,868)	$ (1,837)	$ (3,459)
Basic and diluted weighted average number of units:
Common units	32,915	22,925	32,905	22,910
Weighted Average Limited Partnership Units Outstanding, Diluted	32,915	22,925	32,905	22,910
Restricted and phantom units	741	727	652	606
Basic and diluted net income (loss) per common unit	$ 0.06	$ (0.08)	$ (0.05)	$ (0.15)
Diluted net income per common unit	$ 0.06	$ (0.08)	$ (0.05)	$ (0.15)