v3.26.1
Financing Arrangements - Schedule of Outstanding Financing Arrangements (Details)
€ in Thousands, £ in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
GBP (£)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
GBP (£)
Investment Company, Financial Highlights [Line Items]            
Amount Outstanding $ 1,018,489 $ 1,134,208        
Amount Available $ 631,511 $ 285,792        
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit            
Investment Company, Financial Highlights [Line Items]            
Basis spread on variable rate 2.25% 2.125%        
Amount Outstanding $ 219,989 $ 390,708 € 73,250 £ 84,000 € 80,600 £ 71,500
Amount Available $ 530,011 $ 129,292        
Floor on benchmark rate 0.00% 0.00%        
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit | EUR            
Investment Company, Financial Highlights [Line Items]            
Exchange rate 1.14 1.17 1.14 1.14 1.17 1.17
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit | GBP            
Investment Company, Financial Highlights [Line Items]            
Exchange rate 1.33 1.34 1.33 1.33 1.34 1.34
Revolving Credit Facility | K-FIT AB-1 Credit Facility | Line of Credit            
Investment Company, Financial Highlights [Line Items]            
Basis spread on variable rate 1.85% 1.85%        
Amount Outstanding $ 456,250 $ 427,000        
Amount Available $ 43,750 $ 73,000        
Revolving Credit Facility | K-FIT CO-1 Credit Facility | Line of Credit            
Investment Company, Financial Highlights [Line Items]            
Basis spread on variable rate 1.85% 1.85%        
Amount Outstanding $ 342,250 $ 316,500        
Amount Available $ 57,750 $ 83,500