Statements of Partners' Capital Parenthetical (ClassA Limited Partners [Member], USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
ClassA Limited Partners [Member]
Distributions Per Limited Partnership Unit Outstanding, Basic	$ 0.00	$ 0.06	$ 0.11

Cash dividends declared or paid to each outstanding limited partnership unit during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section F

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187171-122770

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Period Type:	duration