v3.26.1
Fair Value Measurements - Summary of Changes in Fair Value of Investments for Level 3 Inputs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Net realized gains (losses) $ (58) $ (79) $ (104) $ (7) $ (137) $ (111)
Level 3            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value, beginning of period 1,510,388 1,291,490 482,433 444,206 1,291,490 444,206
Purchases of investments 285,440   489,099   512,394 538,854
Payment-in-kind 793   382   1,931 382
Proceeds from investments, net (284,394)   (105,628)   (291,494) (117,827)
Net change in unrealized gain (loss) (3,750)   (401)   (7,368) (358)
Net realized gains (losses) (1)   (6)   (1) (13)
Net amortization/accretion of premium/discount on investments 3,470   1,085   4,994 1,720
Fair value, end of period 1,511,946 1,510,388 866,964 482,433 1,511,946 866,964
Net change in unrealized gain (loss) still held (3,595)   (212)   (7,040) (107)
Level 3 | First-Lien Senior Secured Debt Investments            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value, beginning of period 1,380,357 1,162,717 433,525 395,206 1,162,717 395,206
Purchases of investments 285,440   426,807   512,394 476,562
Proceeds from investments, net (282,153)   (105,502)   (289,127) (117,577)
Net change in unrealized gain (loss) (3,656)   (263)   (7,331) (254)
Net realized gains (losses) (1)   (6)   (1) (13)
Net amortization/accretion of premium/discount on investments 3,334   972   4,669 1,609
Fair value, end of period 1,383,321 1,380,357 755,533 433,525 1,383,321 755,533
Net change in unrealized gain (loss) still held (3,502)   (74)   (7,003) (3)
Level 3 | Second Lien Senior Secured Debt Investments            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value, beginning of period 48,831 48,987 48,908 49,000 48,987 49,000
Proceeds from investments, net (2,241)   (126)   (2,367) (250)
Net change in unrealized gain (loss) (58)   (105)   (147) (71)
Net amortization/accretion of premium/discount on investments 73   88   132 86
Fair value, end of period 46,605 48,831 48,765 $ 48,908 46,605 48,765
Net change in unrealized gain (loss) still held (58)   (105)   (147) (71)
Level 3 | Unsecured Debt Investments            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value, beginning of period 81,200 79,786     79,786  
Purchases of investments     62,292     62,292
Payment-in-kind 793   382   1,931 382
Net change in unrealized gain (loss) (36)   (33)   110 (33)
Net amortization/accretion of premium/discount on investments 63   25   193 25
Fair value, end of period 82,020 $ 81,200 62,666   82,020 62,666
Net change in unrealized gain (loss) still held $ (35)   $ (33)   $ 110 $ (33)