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Derivative Instruments - Fair Value and Aggregate Unrealized Depreciation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 25, 2022	Dec. 23, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit support agreements	$ (6,714,000)	$ 1,800,000	$ 0
MVC Credit Support Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit support agreements	(1,214,000)	1,800,000
Sierra Credit Support Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit support agreements	(3,700,000)
Barings LLC | MVC Credit Support Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	23,000,000	23,000,000			$ 23,000,000
Value	12,386,000	15,400,000
Credit support agreements	(1,214,000)	$ 1,800,000
Barings LLC | Sierra Credit Support Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	100,000,000			$ 100,000,000
Value	40,700,000
Credit support agreements	$ (3,700,000)

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section 55
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-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- 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.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
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-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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X

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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