Fair Value of Financial Instruments - Fair Value Measurements of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	$ 192,200	$ 172,582
Structured credit investments	81,597	97,872
Joint Venture Investments	79,990
Total investments at fair value	3,393,035	3,347,317
Interest rate swaps	(33,692)	10,301
Total	3,359,343	3,357,618
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	1,493	28,169
Total investments at fair value	1,493	28,169
Total	1,493	28,169
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	10,717	11,016
Structured credit investments	81,597	97,872
Total investments at fair value	108,928	137,314
Interest rate swaps	(33,692)	10,301
Total	75,236	147,615
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	179,990	133,397
Joint Venture Investments	79,990
Total investments at fair value	3,282,614	3,181,834
Total	3,282,614	3,181,834
First-lien Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	2,950,384	2,984,501
First-lien Debt Investments \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	16,609	28,204
First-lien Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	2,933,775	2,956,297
Second-lien Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	24,898	30,678
Second-lien Debt Investments \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	5	222
Second-lien Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	24,893	30,456
Mezzanine Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	63,966	61,684
Mezzanine Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	$ 63,966	$ 61,684