TREASURY UNITS (Details)					1 Months Ended	3 Months Ended		6 Months Ended		96 Months Ended	103 Months Ended
	Mar. 10, 2015 shares	Aug. 08, 2008	Aug. 31, 2007 $ / item shares	Aug. 20, 2007 shares	Sep. 30, 2007 $ / item shares	Mar. 31, 2016 $ / item shares	Dec. 31, 2007 $ / item shares	Jun. 30, 2016 USD ($) $ / item shares	Jun. 30, 2015 USD ($) shares	Dec. 31, 2015 $ / item shares	Mar. 31, 2016 USD ($) $ / item shares	Jan. 03, 2012	Mar. 06, 2008 shares	Jan. 30, 2008 shares	Jan. 15, 2008 shares
Treasury units								55,302
Period for repurchase of depository receipts	5 years	12 months		12 months
Depository receipts authorized to be repurchased	2,000,000			300,000									1,500,000	900,000	600,000
Number of depository receipts repurchased											1,352,427
Repurchase price of depository receipts (in dollars per receipt) | $ / item											26.81
Total cost of repurchase | $								$ 694,380	$ 1,879,001		$ 39,291,000
General Partnership
Treasury units								553
Fixed distribution percentage of unit holders								1.00%
Number of depository receipts repurchased			156		156	156	156			156
Units repurchased (in shares)								5
Total cost of repurchase | $								$ 6,783	$ 18,668
Treasury Units
Units repurchased (in shares)									1,253
Total cost of repurchase | $								$ (451)
Class A
Treasury units								44,242
Number of units in each depository receipt				0.1								0.03333
Fixed distribution percentage of unit holders								80.00%
Repurchase price of depository receipts (in dollars per receipt) | $ / item								50.11
Repurchase price of units (in dollars per unit) | $ / item			804.30		804.30	804.30	804.30	1,503.26		804.30
Total cost of repurchase | $								$ 558,723	$ 1,505,645
Repurchase of depository receipts | $								$ 10,829
Class B
Treasury units								10,507
Fixed distribution percentage of unit holders								19.00%
Number of depository receipts repurchased			2,970		2,970	2,970	2,970			2,970
Units repurchased (in shares)								86
Total cost of repurchase | $								$ 128,874	$ 354,688
Class B | General Partnership
Repurchase price of units (in dollars per unit) | $ / item			895.21		895.21	895.21	895.21			895.21