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Unaudited Condensed Consolidated Statements of Changes in Partners' Capital (Parentheticals) (USD $)	1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 22, 2013	Jan. 23, 2012	Apr. 22, 2013	Apr. 24, 2012	Jun. 30, 2013	Jun. 30, 2012
Common units
Distributions [Line Items]
Dividends declared	$ 0.2325	$ 0.2325	$ 0.2325	$ 0.2325	$ 0.465	$ 0.465
Preferred units
Distributions [Line Items]
Dividends declared	$ 0.21375	$ 0	$ 0.21375	$ 0	$ 0.4275

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- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

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