v3.26.3
Fair Value of Financial Instruments - Schedule of Balance Sheet Information (Parenthetical) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Amortized Cost $ 3,407,640 [1],[2],[3] $ 3,323,282 [4],[5],[6]
Ownership interest in members' equity 192,200 $ 172,582
Structured Credit Partners JV, LLC    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Amortized Cost 2,138,270  
Restricted cash and cash equivalents 39,609  
Ownership interest in members' equity $ 79,990  
Percentage of economic interest in noncontrolling interest 5.00%  
[1] As of September 30, 2026, the estimated cost basis of investments for U.S. federal tax purposes was $3,418,558 resulting in estimated gross unrealized gains and losses of $193,711 and $234,062, respectively.
[2] The amortized cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[3] Unless otherwise indicated, the Company’s portfolio companies are domiciled in the United States. Certain portfolio company investments are subject to contractual restrictions on sales.
[4] As of December 31, 2025, the estimated cost basis of investments for U.S. federal tax purposes was $3,332,367 resulting in estimated gross unrealized gains and losses of $219,540 and $231,975, respectively.
[5] Certain portfolio company investments are subject to contractual restrictions on sales.
[6] The amortized cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.