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TREASURY UNITS (Details)				3 Months Ended		115 Months Ended
	Mar. 31, 2017 $ / item shares	Mar. 10, 2015 shares	Aug. 20, 2007 $ / item shares	Mar. 31, 2018 shares	Mar. 31, 2017 USD ($) shares	Mar. 31, 2017 USD ($) $ / item	Mar. 06, 2008 shares
Treasury units				55,839
Period for repurchase of depository receipts		5 years	12 months
Depository receipts authorized to be repurchased		2,000,000	300,000				1,500,000
Number of depository receipts repurchased	1,365,306		1,365,306
Repurchase price of depository receipts (in dollars per receipt) | $ / item						27.14
Units repurchased (in shares)					23
Total cost of repurchase | $					$ 42,548	$ 40,274,000
General Partnership
Treasury units				559
Fixed distribution percentage of unit holders				1.00%
Number of depository receipts repurchased	162		162
Total cost of repurchase | $					$ 426
Treasury Units
Units repurchased (in shares)					23
Class A
Treasury units				44,671
Fixed distribution percentage of unit holders				80.00%
Repurchase price of units (in dollars per unit) | $ / item	814.20		814.20
Total cost of repurchase | $					$ 34,038
Class B
Treasury units				10,609
Fixed distribution percentage of unit holders				19.00%
Number of depository receipts repurchased	3,072		3,072
Total cost of repurchase | $					$ 8,084
Class B | General Partnership
Repurchase price of units (in dollars per unit) | $ / item	926.26		926.26

X

- Definition

Represents the number of depository receipts repurchased under the equity repurchase program.

+ References

No definition available.

+ Details

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- Definition

Represents the average price at which depository receipts are repurchased under the equity repurchase program.

+ References

No definition available.

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- Definition

Represents the number of depository receipts authorized to be repurchased under the equity repurchase program.

+ References

No definition available.

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- Definition

Represents the fixed distribution percentages of the holders of units based on which the entity is required to purchase the proportionate number of specific units with every purchase of depository receipts.

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- Definition

Represents the period over which the entity is permitted to purchase its depository receipts.

+ References

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- Definition

Represents the number of treasury units outstanding as on the balance sheet date.

+ References

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- Definition

Represents the average price at which units are repurchased under the equity repurchase program.

+ References

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- Definition

Value of units that were previously issued and have been repurchased during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054

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- Definition

Units that were previously issued and have been repurchased during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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