v3.26.1
Consolidated Schedule of Investments - Schedule of Investment Interest Rate Swap - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Notional Amount $ 220,000  
Cost 2,986,619 $ 2,883,469 [1],[2],[3],[4],[5]
Fair Value 2,960,692 2,882,954 [1],[2],[3],[5]
Gross Amount of Recognized Assets (2,124)  
Unrealized Appreciation / (Depreciation) $ (26)  
Open Swap Contract, Identifier [Axis]: Derivative Instruments Interest Rate Swap Hedging Item 2029 Notes Company Receives 6.70% Company Pays SOFR + 2.99% Counterparty Goldman Sachs Bank USA Maturity Date 4/10/2029    
Schedule of Investments [Line Items]    
Fixed Interest Rate [6] 6.70%  
Derivative Spread Variable Rate [6] 2.99%  
Counterparty [6] Goldman Sachs Bank USA  
Maturity Date [6] Apr. 10, 2029  
Notional Amount [6] $ 100,000  
Gross Amount of Recognized Assets [6] (905)  
Unrealized Appreciation / (Depreciation) [6] $ (12)  
Open Swap Contract, Identifier [Axis]: Derivative Instruments Interest Rate Swap Hedging Item 2030 Notes Company Receives 6.22% Company Pays SOFR + 2.57% Counterparty Goldman Sachs Bank USA Maturity Date 11/15/2029    
Schedule of Investments [Line Items]    
Fixed Interest Rate [6] 6.26%  
Derivative Spread Variable Rate [6] 2.57%  
Counterparty [6] Goldman Sachs Bank USA  
Maturity Date [6] Nov. 15, 2029  
Notional Amount [6] $ 120,000  
Gross Amount of Recognized Assets [6] (1,219)  
Unrealized Appreciation / (Depreciation) [6] (14)  
Controlled/affiliated investments    
Schedule of Investments [Line Items]    
Cost 10,590 5,318
Fair Value $ 11,394 $ 5,820
[1] All investments were qualifying assets as defined under Section 55(a) of the Investment Company Act of 1940, as amended (the "1940 Act"), except for ALP CFO LP 2024-1, Apex Group Treasury LLC, Barings Middle Market CLO Ltd., Best Egg Asset Structured Pass Through Master Trust, Churchill Middle Market CLO Ltd., Claros Mortgage Trust, Inc., Coller Capital, Exeter Short Term Funding LLC, Inizio Group Limited, Ivy Hill Asset Management, Ivy Hill Middle Market Credit Fund XII Ltd, LD Holdings Group LLC., MC CIF Wealth Management (UK) Ltd. New Mountain Guardian IV Income Rated Feeder II, Ltd., New Mountain Guardian IV Rated Feeder III, LTD., and Syntax Systems Limited.
[2] All of the Company’s investments are domiciled in the United States except for Apex Group Treasury LLC, Barings Middle Market CLO Ltd., Inizio Group Limited, MC CIF Wealth Management Ltd, Flow Traders Holding LLC, New Mountain Guardian IV Income Rated Feeder II Ltd & New Mountain Guardian IV Rated Feeder III Ltd, and Syntax Systems Limited, which are domiciled in Ireland, the Cayman Islands, United Kingdom, United Kingdom, Bermuda, Bermuda, and Canada, respectively.
[3] As of December 31, 2025, all investments are pledged as collateral unless otherwise stated.
[4] Cost represents the original cost adjusted for amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[5] Unless otherwise indicated, all securities are valued using significant unobservable inputs, which are categorized as Level 3 assets under the definition of ASC 820 fair value hierarchy.
[6] Represents securities categorized as Level 2 assets under the definition of ASC 820 fair value hierarchy.