PARTNERS' CAPITAL (Details) (USD $)	3 Months Ended								12 Months Ended		0 Months Ended	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jan. 03, 2012	Mar. 31, 2015	Aug. 20, 2007
Quarterly distribution per unit (in dollars per unit)	7.50				7.50				7.50	7.50
Quarterly distributions per depositary receipt (in dollars per share)	$ 0.25				$ 0.25				$ 0.25	$ 0.25
Distribution per unit (in dollars per unit)	$ 30.00				$ 30.00				$ 30.00	$ 30.00
Earnings per depository receipt
Income (Loss) per Depositary Receipt before Discontinued Operations	0.15	0.05	0.07	(0.01)	0.08	(0.01)	0.20	0.23	0.27	0.50
Income from Discontinued Operations	0.00	0.00	0.00	0.00	0.00	0.00	0.94	0.01	0.00	0.95
Net Income (Loss) per Depositary Receipt after Discontinued Operations (in dollars per share)	0.15	0.05	0.07	(0.01)	0.08	(0.01)	1.15	0.23	0.27	1.45
Distributions per Depositary Receipt (in dollars per share)	1.00				1.00				1.00	1.00
Limited Partner
Number of classes of partners									2
Class A
Fixed distribution percentage of unit holders									80.00%
Forward split of depositary receipts											3
Exchange ratio of depositary receipts for partnership units before adjustment											10
Exchange ratio of depositary receipts for partnership units after adjustment											30
Number of units in each depository receipt											0.03333		0.1
Quarterly distribution per unit approved (in dollars per unit)												7.50
Quarterly distributions per depositary receipt (in dollars per share)												$ 0.25
Class B
Fixed distribution percentage of unit holders									19.00%
General Partnership
Number of classes of partners									1
Fixed distribution percentage of unit holders									1.00%