Floor rate for a debt instrument.

No definition available.

Name:	mcip_DebtInstrumentInterestRateFloorRate
Namespace Prefix:	mcip_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Redemption, Minimum Repayment Of Aggregate Principal Amount Of Senior Notes

+ References

No definition available.

+ Details

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Namespace Prefix:	mcip_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of line of credit facility, maximum advance rate on the portfolio.

+ References

No definition available.

+ Details

Name:	mcip_LineOfCreditFacilityMaximumAdvanceRateOnThePortfolio
Namespace Prefix:	mcip_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line Of Credit Facility, Maximum Borrowing Capacity, Accordion Feature

+ References

No definition available.

+ Details

Name:	mcip_LineOfCreditFacilityMaximumBorrowingCapacityAccordionFeature
Namespace Prefix:	mcip_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
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+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- 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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
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-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
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-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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

- Details

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Namespace Prefix:
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Period Type:

- Details

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Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=mcip_PrivatePlacementBondsMember
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Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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Subsequent Events - Narrative (Details) $ / shares in Units, $ in Thousands	Jul. 24, 2024 USD ($)	Jul. 15, 2024	Jul. 11, 2024 USD ($)	Jul. 05, 2024 $ / shares	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Subsequent Event
Principal amount					$ 1,868,197	$ 1,587,138
Interest expense - SPV Credit Facility
Subsequent Event
Maximum borrowing capacity					$ 450,000
Interest rate, floor					0.50%
Maximum percentage of advance rate on the portfolio					67.00%
Principal amount					$ 450,000	$ 450,000
Subsequent Event \| Series C Senior Unsecured Notes 2029 \| Private Placement Bonds
Subsequent Event
Principal amount	$ 156,000
Interest rate	7.47%
Subsequent Event \| Series D Senior Unsecured Notes 2029 \| Private Placement Bonds
Subsequent Event
Principal amount	$ 48,000
Interest rate	7.47%
Subsequent Event \| Senior Unsecured Notes 2029 \| Private Placement Bonds
Subsequent Event
Minimum repayment of aggregate principal amount of senior notes	0.10
Debt Instrument, redemption price, percentage	100.00%
Subsequent Event \| SPV IV Credit Facility
Subsequent Event
Maximum borrowing capacity			$ 350,000
Accordion feature, total facility amount			$ 450,000
Interest rate, floor			0.00%
Interest rate, basis spread			2.15%
Maximum percentage of advance rate on the portfolio			75.00%
Subsequent Event \| SPV IV Credit Facility \| Minimum
Subsequent Event
Commitment fee (in percent)			0.25%
Subsequent Event \| SPV IV Credit Facility \| Maximum
Subsequent Event
Commitment fee (in percent)			0.75%
Subsequent Event \| Interest expense - SPV Credit Facility
Subsequent Event
Interest rate, basis spread		2.40%
Dividend Declared \| Subsequent Event
Subsequent Event
Dividends declared, amount per share (in dollars per share) \| $ / shares				$ 0.02