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Fair Value of Financial Instruments - Summary of Fair Value Measurements of Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Fair Value Disclosures [Line Items]    
Subtotal $ 1,541,698 $ 1,559,431
Investments Measured at NAV 38,980 39,426
Total Investments 1,580,678 1,598,857
Foreign Currency Forward Contracts - Assets 2,082 4,815
Foreign Currency Forward Contracts - Liabilities 2,271  
Level 2    
Fair Value Disclosures [Line Items]    
Subtotal 6,437 45,517
Foreign Currency Forward Contracts - Assets 2,082 4,815
Foreign Currency Forward Contracts - Liabilities 2,271  
Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 1,535,261 1,513,914
Investments Measured at NAV 1,535,261 1,513,914
Senior Secured First Lien    
Fair Value Disclosures [Line Items]    
Subtotal 352,812 379,628
Senior Secured First Lien | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 352,812 379,628
Unitranche First Lien    
Fair Value Disclosures [Line Items]    
Subtotal 1,039,804 1,044,140
Unitranche First Lien | Level 2    
Fair Value Disclosures [Line Items]    
Subtotal 5,769 30,206
Unitranche First Lien | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 1,034,035 1,013,934
Unitranche First Lien Last Out    
Fair Value Disclosures [Line Items]    
Subtotal 26,170 14,741
Unitranche First Lien Last Out | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 26,170 14,741
Senior Secured Second Lien    
Fair Value Disclosures [Line Items]    
Subtotal 18,647 38,537
Senior Secured Second Lien | Level 2    
Fair Value Disclosures [Line Items]    
Subtotal   14,186
Senior Secured Second Lien | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 18,647 24,351
Unsecured Debt    
Fair Value Disclosures [Line Items]    
Subtotal 19,531 17,525
Unsecured Debt | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal 19,531 17,525
Equity & Other    
Fair Value Disclosures [Line Items]    
Subtotal 84,734 64,860
Equity & Other | Level 2    
Fair Value Disclosures [Line Items]    
Subtotal 668 1,125
Equity & Other | Level 3    
Fair Value Disclosures [Line Items]    
Subtotal $ 84,066 $ 63,735