Fair Value of Financial Instruments - Fair Value Measurements of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	$ 150,992	$ 172,582
Structured credit investments	93,805	97,872
Joint Venture Investments	14,665
Total investments at fair value	3,313,441	3,347,317
Interest rate swaps	4,728	10,301
Total	3,318,169	3,357,618
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	14,826	28,169
Total investments at fair value	14,826	28,169
Total	14,826	28,169
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	10,767	11,016
Structured credit investments	93,805	97,872
Total investments at fair value	120,761	137,314
Interest rate swaps	4,728	10,301
Total	125,489	147,615
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity investment	125,399	133,397
Joint Venture Investments	14,665
Total investments at fair value	3,177,854	3,181,834
Total	3,177,854	3,181,834
First-lien Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	2,959,032	2,984,501
First-lien Debt Investments \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	16,067	28,204
First-lien Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	2,942,965	2,956,297
Second-lien Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	31,195	30,678
Second-lien Debt Investments \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	122	222
Second-lien Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	31,073	30,456
Mezzanine Debt Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	63,752	61,684
Mezzanine Debt Investments \| Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt investments	$ 63,752	$ 61,684