PARTNERS' CAPITAL AND DISTRIBUTIONS (Details 2) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 01, 2013
Total
Partner's capital and distributions
Beginning Balance	98,346
Issuance of Class B Units in lieu of quarterly cash distributions	494
Ending Balance	106,407
Total | Institutional investors
Partner's capital and distributions
Issuance of units to institutional investors	6,900
Total | Equity Distribution Agreement
Partner's capital and distributions
Issuance of units to institutional investors	489
Total | Option Plan
Partner's capital and distributions
LP Units issued	25
Total | Long Term Incentive Plan 2009
Partner's capital and distributions
LP Units issued	153
Limited Partners
Partner's capital and distributions
Beginning Balance	90,371
Conversion of Class B Units to LP Units	8,469
Ending Balance	106,407
Limited Partners | Institutional investors
Partner's capital and distributions
Issuance of units to institutional investors	6,900
Limited Partners | Equity Distribution Agreement
Partner's capital and distributions
Issuance of units to institutional investors	489
Limited Partners | Option Plan
Partner's capital and distributions
LP Units issued	25
Limited Partners | Long Term Incentive Plan 2009
Partner's capital and distributions
LP Units issued	153
Class B Units
Partner's capital and distributions
Beginning Balance	7,975	8,500
Issuance of Class B Units in lieu of quarterly cash distributions	494
Conversion of Class B Units to LP Units	(8,469)
Ending Balance	0	8,500