Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 1,248,920	$ 809,029
Fair Value	1,262,452	808,801
Net Unrealized Gain (Loss)	13,532	(228)
First-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,232,474	801,223
Fair Value	1,246,008	800,995
Net Unrealized Gain (Loss)	13,534	(228)
Equity and Other Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	16,446	7,806
Fair Value	$ 16,444	$ 7,806

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 45
-Paragraph 1
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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