The cash received from partnership contribution.

No definition available.

Name:	cplp_CashReceivedPartnershipContribution
Namespace Prefix:	cplp_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The date the Partnership closed a definitive transaction agreement with a third party, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	cplp_DateOfClosingTransactionAgreement
Namespace Prefix:	cplp_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The date the Partnership entered into a definitive transaction agreement with a third party, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	cplp_DateOfTransactionAgreement
Namespace Prefix:	cplp_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the reverse common and general partner unit split arrangement.

+ References

No definition available.

+ Details

Name:	cplp_PartnersCapitalReverseUnitSplit
Namespace Prefix:	cplp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of stock or units eligible for distribution to members or limited partners of the limited liability company (LLC) or limited partnership (LP).

+ References

No definition available.

+ Details

Name:	us-gaap_StockOrUnitsAvailableForDistributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	dei_LegalEntityAxis=cplp_DiamondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=cplp_TransactionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Basis of Presentation and General Information - Transaction Agreement DSS (Details) - USD ($) $ in Thousands	3 Months Ended	11 Months Ended	12 Months Ended
	Mar. 27, 2019	Nov. 27, 2018	Dec. 31, 2018
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items]
Reverse unit split, description	one for seven reverse unit split
Athena renamed to Diamond S
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items]
Cash received		$ 10,000
Shares to be distributed		12,725,000
Transaction Agreement with DSS
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items]
Closing date of Transaction Agreement			Mar. 27, 2019
Credit facility, maximum borrowing capacity		$ 360,000
Expiration period of line of credit			5 years
Date Of Transaction Agreement			Nov. 27, 2018