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Vessels (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Property Plant And Equipment [Line Items]
Net proceeds from sale of vessel	$ 19,675	$ 0
Gain on sale of vessel	1,296	0
M/T Attikos
Property Plant And Equipment [Line Items]
Date of vessel sale	Feb. 14, 2012
DWT	12,000
Year built	2005
Net proceeds from sale of vessel	9,819
Gain on sale of vessel	943
M/T Aristofanis
Property Plant And Equipment [Line Items]
Date of vessel sale	Apr. 04, 2012
DWT	12,000
Year built	2005
Net proceeds from sale of vessel	9,882
Gain on sale of vessel	$ 353

X

- Definition

The cash proceeds net of commissions and expenses from the sale of vessels.

+ References

No definition available.

+ Details

Name:	cplp_ProceedsFromSaleOfVessel
Namespace Prefix:	cplp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The vessel's size in DWT.

+ References

No definition available.

+ Details

Name:	cplp_VesselCapacity
Namespace Prefix:	cplp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The year that the vessel was built.

+ References

No definition available.

+ Details

Name:	cplp_VesselYearBuilt
Namespace Prefix:	cplp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date of acquisition or disposal, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_SignificantAcquisitionsAndDisposalsDateOfTransactionForAcquisitionsOrDisposals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration