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SUBSEQUENT EVENTS (Details) (USD $)	9 Months Ended	61 Months Ended	9 Months Ended	61 Months Ended	9 Months Ended	61 Months Ended	1 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012 Class B Units	Sep. 30, 2012 Class B Units	Sep. 30, 2012 General Partnership	Sep. 30, 2012 General Partnership	Nov. 09, 2012 Subsequent event	Nov. 09, 2012 Subsequent event Class B Units	Nov. 09, 2012 Subsequent event General Partnership
Subsequent events
Repurchase of depository receipts (in shares)	16,985	1,211,945	135	1,859	7	98	942
Repurchase price of depository receipts (in dollars per share)		$ 24.59					$ 28.85
Repurchase price of units (in dollars per share)				$ 604.92		$ 604.92	$ 865.50
Repurchase of units	$ 610,294	$ 31,150,000	$ 115,584		$ 6,083		$ 28,344	$ 6,454	$ 340
Repurchase of units (in shares)	(708)							7.5	0.39

X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

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X

- 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Practice Bulletin (PB)

-Number 14

-Paragraph 8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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=6959260&loc=d3e187171-122770



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-Name Practice Bulletin (PB)

-Number 14

-Paragraph 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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