TREASURY UNITS (Details) (USD $)	0 Months Ended		3 Months Ended		79 Months Ended				1 Months Ended	3 Months Ended		79 Months Ended			3 Months Ended		79 Months Ended	1 Months Ended	3 Months Ended		79 Months Ended	1 Months Ended
	Aug. 08, 2008	Aug. 20, 2007	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 06, 2008	Jan. 30, 2008	Jan. 15, 2008	May 06, 2014 Subsequent event	Mar. 31, 2014 Class A Treasury Units	Mar. 31, 2013 Class A Treasury Units	Mar. 31, 2014 Class A Treasury Units	Jan. 03, 2012 Class A Treasury Units	Aug. 20, 2007 Class A Treasury Units	Mar. 31, 2014 Class B Treasury Units	Mar. 31, 2013 Class B Treasury Units	Mar. 31, 2014 Class B Treasury Units	May 06, 2014 Class B Treasury Units Subsequent event	Mar. 31, 2014 General Partnership	Mar. 31, 2013 General Partnership	Mar. 31, 2014 General Partnership	May 06, 2014 General Partnership Subsequent event
Treasury units			51,009		51,009					40,807		40,807			9,692		9,692		510		510
Period for repurchase of depository receipts	12 months	12 months
Depository receipts authorized to be repurchased		300,000				1,500,000	900,000	600,000
Number of units in each depository receipt													0.03333	0.1
Fixed distribution percentage of unit holders										80.00%					19.00%				1.00%
Repurchase of depository receipts			6,513		1,249,404				3,832								2,155
Repurchase price of depository receipts			$ 45.56		$ 24.97				$ 45.67
Repurchase price of units			$ 1,366.80						$ 1,370.23			$ 749.10					$ 675.73				$ 675.73
Repurchase of units			271	404											51.56			30.34	2.71		114	1.6
Total cost of repurchase			$ 379,409	$ 399,487	$ 32,860,350					$ 305,230	$ 321,240				$ 70,470	$ 74,335		$ 41,568	$ 3,709	$ 3,912		$ 2,188
Repurchase of depository receipts			$ 305,230						$ 179,782