v3.26.1
Consolidated Schedule of Investments (Company's Controlled/Non Controlled Investments) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance $ 25,337,420    
Change in Unrealized Gains (Loss) (283,305) $ 69,458  
Net Realized Gain (Loss) 15,221 (19,886)  
Ending balance 25,007,853   $ 25,337,420
Affiliated | Logo Holdings III Corporation      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,177 7,386 7,386
Gross Additions 478   551
Gross Reductions 0   (57)
Change in Unrealized Gains (Loss) (184)   2,297
Net Realized Gain (Loss) 0   0
Ending balance 10,471   10,177
Dividend and Interest Income 476   662
Affiliated | Southern Graphics Holdings LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,467 3,069 3,069
Gross Additions 0   0
Gross Reductions 0   0
Change in Unrealized Gains (Loss) 3   (1,602)
Net Realized Gain (Loss) 0   0
Ending balance 1,470   1,467
Dividend and Interest Income 0   0
Affiliated | Velocity Cayman Holding L.P.      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,476 0 0
Gross Additions 0   6,162
Gross Reductions 0   0
Change in Unrealized Gains (Loss) 218   314
Net Realized Gain (Loss) 0   0
Ending balance 6,694   6,476
Dividend and Interest Income 0   0
Affiliated | Velocity Cayman Holdings GP LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 0 0
Gross Additions 0   0
Gross Reductions 0   0
Change in Unrealized Gains (Loss) 0   0
Net Realized Gain (Loss) 0   0
Ending balance 0   0
Dividend and Interest Income 0   0
Affiliated | Galaxy US Opco Inc      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,257 0 0
Gross Additions 119   12,648
Gross Reductions (35)   (2,364)
Change in Unrealized Gains (Loss) (1,148)   973
Net Realized Gain (Loss) 0   0
Ending balance 10,193   11,257
Dividend and Interest Income 279   1,228
Affiliated | Artemis Bidco Limited      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,189 0 0
Gross Additions 94   6,964
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (186)   225
Net Realized Gain (Loss) 0   0
Ending balance 7,097   7,189
Dividend and Interest Income 273   6
Affiliated | Ark Newco Limited      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,688 0 0
Gross Additions 0   10,210
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (214)   (522)
Net Realized Gain (Loss) 0   0
Ending balance 9,474   9,688
Dividend and Interest Income 0   0
Affiliated | Wash & Wax Systems LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,404 0 0
Gross Additions 391   15,154
Gross Reductions (36)   (92)
Change in Unrealized Gains (Loss) (37)   342
Net Realized Gain (Loss) 0   0
Ending balance 15,722   15,404
Dividend and Interest Income 395   659
Affiliated | Wash & Wax Holdings LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,262 0 0
Gross Additions 351   9,817
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (43)   445
Net Realized Gain (Loss) 0   0
Ending balance 10,570   10,262
Dividend and Interest Income 350   352
Affiliated | Wash & Wax Group LP      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,991 0 0
Gross Additions 0   8,547
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (1,776)   (1,556)
Net Realized Gain (Loss) 0   0
Ending balance 5,215   6,991
Dividend and Interest Income 0   0
Affiliated | New Era Technology Inc      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,779 0 0
Gross Additions 201   7,690
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (5)   89
Net Realized Gain (Loss) 0   0
Ending balance 7,975   7,779
Dividend and Interest Income 203   202
Affiliated | NE SPV Holdco, LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,437 0 0
Gross Additions 0   5,239
Gross Reductions 0   0
Change in Unrealized Gains (Loss) (228)   (1,802)
Net Realized Gain (Loss) 0   0
Ending balance 3,209   3,437
Dividend and Interest Income 0   0
Affiliated | Daphne S.P.A.      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 28,118    
Gross Reductions (23)    
Change in Unrealized Gains (Loss) (1,108)    
Net Realized Gain (Loss) 0    
Ending balance 26,987   0
Dividend and Interest Income 421    
Affiliated | Demon Holdco Lux Sarl      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 22,660    
Gross Reductions 0    
Change in Unrealized Gains (Loss) (755)    
Net Realized Gain (Loss) 0    
Ending balance 21,905   0
Dividend and Interest Income 0    
Affiliated | SLF V AD1 Holdings, LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,298 9,514 9,514
Gross Additions 0   0
Gross Reductions (1,586)   0
Change in Unrealized Gains (Loss) (2,745)   (216)
Net Realized Gain (Loss) 0   0
Ending balance 4,967   9,298
Dividend and Interest Income 0   0
Affiliated | ULTRA III, LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 416,244 320,350 320,350
Gross Additions 20,105   111,000
Gross Reductions (1,476)   (6,347)
Change in Unrealized Gains (Loss) (8,659)   (8,759)
Net Realized Gain (Loss) 0   0
Ending balance 426,214   416,244
Dividend and Interest Income 14,659   47,918
Noncontrolled/affiliated      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 99,425 19,969 19,969
Gross Additions 52,412   82,982
Gross Reductions (1,680)   (2,513)
Change in Unrealized Gains (Loss) (8,208) (66) (1,013)
Net Realized Gain (Loss) 0   0
Ending balance 141,949   99,425
Dividend and Interest Income 2,397   3,109
Controlled/affiliated      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 416,244 320,350 320,350
Gross Additions 20,105   111,000
Gross Reductions (1,476)   (6,347)
Change in Unrealized Gains (Loss) (8,659) $ 2,274 (8,759)
Net Realized Gain (Loss) 0   0
Ending balance 426,214   416,244
Dividend and Interest Income $ 14,659   $ 47,918