Investments - Composition of the Company's Investment Portfolio, at Amortized Cost and Fair Value (with Corresponding Percentage of Total Portfolio Investments) (Details) - USD ($)
$ in Thousands

6 Months Ended

12 Months Ended

Jun. 30, 2025

Dec. 31, 2024

Investments

Investment owned, cost

$ 414,808

^[1]

$ 495,797

^[2],[3]

$ 367,700

^[1],[4]

$ 457,048

^[2],[3],[5]

Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

100.00%

100.00%

Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

100.00%

100.00%

Senior secured loans

Investments

Investment owned, cost

$ 285,753

$ 372,074

$ 270,091

$ 357,994

Senior secured loans | Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

68.90%

75.00%

Senior secured loans | Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

73.50%

78.30%

Unitranche secured loans

Investments

Investment owned, cost

$ 2,163

$ 3,835

$ 2,183

$ 3,862

Unitranche secured loans | Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

0.50%

0.80%

Unitranche secured loans | Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

0.60%

0.80%

Junior secured loans

Investments

Investment owned, cost

$ 41,810

$ 35,771

$ 31,679

$ 29,634

Junior secured loans | Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

10.10%

7.20%

Junior secured loans | Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

8.60%

6.50%

LLC equity interest in SLF

Investments

Investment owned, cost

$ 42,650

$ 42,650

$ 30,157

$ 32,730

LLC equity interest in SLF | Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

10.30%

8.60%

LLC equity interest in SLF | Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

8.20%

7.20%

Equity investments

Investments

Investment owned, cost

$ 42,432

$ 41,467

$ 33,590

$ 32,828

Equity investments | Investment Owned, At Cost | Investment Type Concentration Risk

Investments

Concentration risk, percentage

10.20%

8.40%

Equity investments | Investment Owned, At Fair Value | Investment Type Concentration Risk

Investments

Concentration risk, percentage

9.10%

7.20%

[1]	All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940 (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[2]	All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940 (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[3]	As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” of and to “Control” this portfolio company as it owns more than 25% of the portfolio company’s voting securities. See Note 5 in the accompanying notes to the consolidated financial statements for additional information on transactions in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to Control.
[4]	Because there is no readily available market value for these investments, the fair value of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements).
[5]	Because there is no readily available market value for these investments, the fair value of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements)