v3.26.1
Investments - Summary of Amortized Cost and Fair Value of Portfolio Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Amortized Cost $ 872,800 [1],[2],[3] $ 874,196 [4],[5],[6],[7]
Amortized Cost Percentage 100.00% 100.00%
Fair Value $ 836,632 [1],[3] $ 849,354 [4],[5],[7]
Fair Value Percentage 100.00% 100.00%
Investment, Unaffiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Amortized Cost $ 689,423 [1],[2],[3] $ 696,234 [4],[6],[7]
Fair Value 664,778 [1],[3] 683,652 [4],[7]
Investment, Affiliated Issuer, Controlled [Member]    
Schedule of Investments [Line Items]    
Amortized Cost 183,377 [1],[2],[3],[8] 177,962 [4],[5],[6],[7]
Fair Value 171,854 [1],[3],[8] 165,702 [4],[5],[7]
Senior Secured First Lien Loans    
Schedule of Investments [Line Items]    
Amortized Cost 4,442,732 4,281,630
Fair Value 4,291,640 [9] 4,132,105 [10]
Senior Secured First Lien Loans | Investment, Unaffiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Amortized Cost $ 678,542 [1],[2],[3] $ 685,275 [4],[6],[7]
Amortized Cost Percentage 77.80% 78.30%
Fair Value $ 655,435 [1],[3] $ 673,713 [4],[7]
Fair Value Percentage 78.40% 79.30%
Equity | Investment, Unaffiliated Issuer [Member]    
Schedule of Investments [Line Items]    
Amortized Cost $ 10,881 [1],[2],[3] $ 10,959 [4],[6],[7]
Amortized Cost Percentage 1.20% 1.30%
Fair Value $ 9,343 [1],[3] $ 9,939 [4],[7]
Fair Value Percentage 1.10% 1.20%
Subordinated Certificates Of SDLP | Investment, Affiliated Issuer, Controlled [Member]    
Schedule of Investments [Line Items]    
Amortized Cost $ 183,377 $ 177,962
Amortized Cost Percentage 21.00% 20.40%
Fair Value $ 171,854 $ 165,702
Fair Value Percentage 20.50% 19.50%
[1]

# 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 (See "Note 4. Fair Value Measurements").
[2]

(++) Negative cost, if applicable, results from unamortized fees on unfunded commitments, which are capitalized to the investment cost. The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[3] + All of the issuers of the investments held by the Company are domiciled in the United States. Certain investments also have international operations.
[4]

# 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 (See "Note 4. Fair Value Measurements").
[5]

(+) Controlled Investments are defined by the Investment Company Act of 1940 Act, as amended (the "1940 Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[6]

(++) Negative cost, if applicable, results from unamortized fees on unfunded commitments, which are capitalized to the investment cost. The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[7] + All of the issuers of the investments held by the Company are domiciled in the United States. Certain investments also have international operations.
[8]

(+) Controlled Investments are defined by the Investment Company Act of 1940 Act, as amended (the "1940 Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[9]

(4) The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[10]

(4) The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.