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Transactions with Related Parties - Additional Information (Details) $ in Thousands	5 Months Ended	6 Months Ended
	Jun. 09, 2011	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2011
Related Party Transaction
Number of vessels		37
Vessel operating expenses		$ 6,154	$ 5,685
General and administrative expenses		3,186	2,975
Executive services agreement with CGP
Related Party Transaction
General and administrative expenses		844	844
Capital Ship Management Corp. | Fixed fee management agreement
Related Party Transaction
Vessel operating expenses		116	278
Capital Ship Management Corp. | Floating fee management agreement
Related Party Transaction
Management agreement initial term, per managed vessel	5
Vessel operating expenses		$ 5,512	4,893
Capital Ship Management Corp. | Crude Carriers Corp. ("Crude") management agreement
Related Party Transaction
Number of vessels		3				5
Vessel operating expenses		$ 526	$ 514
Management agreement termination fees				$ 10,347	$ 10,124

X

- Definition

Fees related to the termination of the Crude management agreement.

+ References

No definition available.

+ Details

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X

- Definition

The initial term of the management agreement per managed vessel.

+ References

No definition available.

+ Details

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X

- Definition

Number of vessels owned and/ or to be acquired by the partnership.

+ References

No definition available.

+ Details

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X

- Definition

Related party vessel operating expenses consist of crewing, repairs and maintenance, insurance, stores, spares, lubricants, management fees and miscellaneous expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	cplp_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

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X

- 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

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- Details

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- Details

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- Details

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X

- Details

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X

- Details

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