v3.26.1
Fair Value Measurements - Schedule of investments by fair value hierarchy (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value Measurements    
Investments at fair value $ 2,363,576 $ 2,508,441
Cash equivalents 52,077 38,814
Forward currency exchange contracts (asset) 1,804 0
Forward currency exchange contracts (liability) (1,105) (9,061)
Interest rate swap (asset) 890 7,976
Interest rate swap (liability) (4,621) 0
First Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value 1,499,617 1,598,731
Second Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value 30,069 30,020
Subordinated Debt    
Fair Value Measurements    
Investments at fair value 86,634 95,687
Preferred Equity    
Fair Value Measurements    
Investments at fair value 182,668 157,244
Equity Interests    
Fair Value Measurements    
Investments at fair value 176,788 226,663
Warrants    
Fair Value Measurements    
Investments at fair value 696 1,045
Subordinated Notes Investment Vehicles    
Fair Value Measurements    
Investments at fair value 354,534 [1] 348,654 [2]
Preferred Equity Interests Investment Vehicles    
Fair Value Measurements    
Investments at fair value 1,836 [1] 1,836 [2]
Equity Interests Investment Vehicles    
Fair Value Measurements    
Investments at fair value 30,734 [1] 48,561 [2]
Level 1    
Fair Value Measurements    
Cash equivalents 52,077 38,814
Level 2    
Fair Value Measurements    
Investments at fair value   2,610
Forward currency exchange contracts (asset) 1,804  
Forward currency exchange contracts (liability) (1,105) (9,061)
Interest rate swap (asset) 890 7,976
Interest rate swap (liability) (4,621)  
Level 2 | First Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value   2,610
Level 3    
Fair Value Measurements    
Investments at fair value 2,317,957 2,443,312
Level 3 | First Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value 1,494,684 1,591,538
Level 3 | Second Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value 30,069 30,020
Level 3 | Subordinated Debt    
Fair Value Measurements    
Investments at fair value 86,634 95,687
Level 3 | Preferred Equity    
Fair Value Measurements    
Investments at fair value 182,668 157,244
Level 3 | Equity Interests    
Fair Value Measurements    
Investments at fair value 168,672 219,124
Level 3 | Warrants    
Fair Value Measurements    
Investments at fair value 696 1,045
Level 3 | Subordinated Notes Investment Vehicles    
Fair Value Measurements    
Investments at fair value 354,534 [1] 348,654 [2]
Net asset value    
Fair Value Measurements    
Investments at fair value 45,619 [3] 62,519 [4]
Net asset value | First Lien Senior Secured Loans    
Fair Value Measurements    
Investments at fair value 4,933 [3] 4,583 [4]
Net asset value | Equity Interests    
Fair Value Measurements    
Investments at fair value 8,116 [3] 7,539 [4]
Net asset value | Preferred Equity Interests Investment Vehicles    
Fair Value Measurements    
Investments at fair value 1,836 [1],[3] 1,836 [2],[4]
Net asset value | Equity Interests Investment Vehicles    
Fair Value Measurements    
Investments at fair value $ 30,734 [1],[3] $ 48,561 [2],[4]
[1] Includes debt and equity investment in ISLP and SLP.
[2] Includes debt and equity investments in ISLP and SLP.
[3] In accordance with ASC Subtopic 820-10, Fair Value Measurements and Disclosures, or ASC 820-10, certain investments are measured using the net asset value per share (or its equivalent) as a practical expedient for fair value, and have not been classified in the fair value hierarchy.
[4] In accordance with ASC Subtopic 820‑10, Fair Value Measurements and Disclosures, or ASC 820‑10, certain investments are measured using the net asset value per share (or its equivalent) as a practical expedient for fair value, and have not been classified in the fair value hierarchy.