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Income Taxes - Summary of Federal Income Tax Purposes Cost of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Tax-basis amortized cost of investments	$ 910,599	$ 811,962
Tax-basis gross unrealized appreciation on investments	86,768	87,884
Tax-basis gross unrealized depreciation on investments	(39,461)	(39,517)
Tax-basis net unrealized appreciation on investments	47,304	48,367
Fair value of investments	$ 957,906	$ 860,329

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Tax basis amortized cost of investments.

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Amount of cost of investment for federal income tax purpose.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(h)(2)(iv))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

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Amount of cumulative increase in investment from unrealized gain when value exceeds cost for federal income tax purpose.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(h)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

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Amount of cumulative decrease in investment from unrealized loss when cost for federal income tax purpose exceeds value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(h)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

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Amount of cumulative increase (decrease) in investment from unrealized gain (loss) when value exceeds (is less than) cost for federal income tax purpose.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(h)(2)(iii))
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