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Unaudited Consolidated Schedule of Investments - Schedule of Investment Portfolio at Cost and Fair Value (Parenthetical) - USD ($)
$ in Thousands

6 Months Ended

12 Months Ended

Jun. 30, 2024

Dec. 31, 2023

Schedule of Investments [Line Items]

Cost

$ 2,445,862

$ 2,535,576

Fair Value

$ 2,395,660

$ 2,488,715

Percentage of Total Net Assets

199.30%

^[1]

208.00%

^[2]

Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

100.00%

100.00%

Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

100.00%

100.00%

Senior debt and 1st lien notes

Schedule of Investments [Line Items]

Cost

$ 1,629,203

$ 1,705,353

Fair Value

$ 1,581,827

$ 1,670,300

Percentage of Total Net Assets

131.00%

140.00%

Senior debt and 1st lien notes | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

67.00%

67.00%

Senior debt and 1st lien notes | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

66.00%

67.00%

Subordinated debt and 2nd lien notes

Schedule of Investments [Line Items]

Cost

$ 242,827

$ 256,850

Fair Value

$ 226,055

$ 238,215

Percentage of Total Net Assets

19.00%

20.00%

Subordinated debt and 2nd lien notes | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

10.00%

10.00%

Subordinated debt and 2nd lien notes | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

10.00%

10.00%

Structured products

Schedule of Investments [Line Items]

Cost

$ 101,969

$ 107,314

Fair Value

$ 92,487

$ 93,038

Percentage of Total Net Assets

8.00%

8.00%

Structured products | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

4.00%

4.00%

Structured products | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

4.00%

4.00%

Equity shares

Schedule of Investments [Line Items]

Cost

$ 326,193

$ 320,335

Fair Value

$ 383,304

$ 374,704

Percentage of Total Net Assets

32.00%

31.00%

Equity shares | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

13.00%

13.00%

Equity shares | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

16.00%

15.00%

Equity warrants

Schedule of Investments [Line Items]

Cost

$ 76

$ 76

Fair Value

$ 2,624

$ 2,392

Percentage of Total Net Assets

0.00%

0.00%

Equity warrants | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

0.00%

0.00%

Equity warrants | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

0.00%

0.00%

Royalty rights

Schedule of Investments [Line Items]

Cost

$ 3,871

Fair Value

$ 3,871

Percentage of Total Net Assets

0.00%

Royalty rights | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

0.00%

Royalty rights | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

0.00%

Investment in joint ventures / PE fund

Schedule of Investments [Line Items]

Cost

$ 141,723

$ 145,648

Fair Value

$ 105,492

$ 110,066

Percentage of Total Net Assets

9.00%

9.00%

Investment in joint ventures / PE fund | Percentage of Total Portfolio, at Cost | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

6.00%

6.00%

Investment in joint ventures / PE fund | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk

Schedule of Investments [Line Items]

Percentage of Total Portfolio

4.00%

4.00%

[1]	Fair value as a percentage of net assets.
[2]	Fair value as a percentage of net assets.

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