v3.25.4
Significant Agreements and Related Party Transactions - Schedule of Affiliated Investments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Beginning Fair Value Balance $ 7,273,815  
Ending Fair Value Balance 15,674,510 [1] $ 7,273,815
From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 491,948 65,977
Gross Additions 8,110,021 6,414,749
Gross Reductions (8,251,112) (5,984,838)
Net Change in Unrealized Appreciation (Depreciation) (10,440) (3,940)
Ending Fair Value Balance 340,417 491,948
Dividend,Interest and Other Income 22,231 20,940
Goldman Sachs Financial Square Government Fund - Institutional Shares | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 444,718 65,977
Gross Additions 8,078,788 6,362,920
Gross Reductions (8,249,763) (5,984,179)
Ending Fair Value Balance 273,743 444,718
Dividend,Interest and Other Income 17,563 17,096
LCG Vardiman Black, LLC (dba Specialty Dental Brands) | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 22,379  
Gross Additions   26,264
Gross Reductions   (9)
Net Change in Unrealized Appreciation (Depreciation)   (3,876)
Ending Fair Value Balance   22,379
Dividend, Interest and Other Income   2,332
ABC Investment Holdco Inc. (dba ABC Plumbing) | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 24,851  
Gross Additions   25,565
Gross Reductions   (650)
Net Change in Unrealized Appreciation (Depreciation)   (64)
Ending Fair Value Balance   24,851
Dividend, Interest and Other Income   1,512
RPC ABC Investment Holdings LLC (dba ABC Plumbing) | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 24,851  
Gross Additions 13,475  
Gross Reductions (1,311)  
Net Change in Unrealized Appreciation (Depreciation) (2,639)  
Ending Fair Value Balance 34,376 24,851
Dividend, Interest and Other Income 2,648  
SDB HOLDCO, LLC (dba Specialty Dental Brands) | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Beginning Fair Value Balance 22,379  
Gross Additions 7,774  
Gross Reductions (23)  
Net Change in Unrealized Appreciation (Depreciation) (7,717)  
Ending Fair Value Balance 22,413 $ 22,379
Dividend, Interest and Other Income 1,777  
SEM Holdings, LLC (dba Southeast Mechanical, LLC) | From Non-controlled Affiliated Investments    
Schedule of Investments [Line Items]    
Gross Additions 9,984  
Gross Reductions (15)  
Net Change in Unrealized Appreciation (Depreciation) (84)  
Ending Fair Value Balance 9,885  
Dividend, Interest and Other Income $ 243  
[1] For Industry subtotal and percentage, see Note 4 “Investments.”