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Subsequent Events - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

May 01, 2023

Apr. 28, 2023

Apr. 04, 2023

Feb. 15, 2023

Nov. 03, 2022

May 02, 2022

Feb. 15, 2022

Nov. 01, 2021

Aug. 02, 2021

May 03, 2021

Feb. 09, 2021

Mar. 31, 2023

Mar. 31, 2022

Dec. 31, 2022

Dec. 31, 2021

Subsequent Event [Line Items]

Investments at cost

$ 864,980

^[1],[2],[3]

$ 828,693

^[4],[5],[6]

Investment commitment amount

^{[1],[2],[3],[7],[8]}

1,000

Proceeds from sales and repayments of investments

15,918

$ 23,185

Realized gain (loss) on investment

$ 58

$ 6,868

Dividends to stockholders

$ 0.41

$ 0.36

$ 0.36

$ 0.32

$ 0.32

$ 0.31

$ 0.31

$ 0.66

$ 2.00

$ 1.60

Dividend payable date

Mar. 29, 2023

Jun. 24, 2022

Mar. 25, 2022

Dec. 17, 2021

Sep. 28, 2021

Jun. 28, 2021

Mar. 26, 2021

Dividend record date

Mar. 22, 2023

Jun. 10, 2022

Mar. 11, 2022

Dec. 03, 2021

Sep. 14, 2021

Jun. 14, 2021

Mar. 12, 2021

Subsequent Events

Subsequent Event [Line Items]

Dividend declared date

May 01, 2023

Dividend payable date

Jun. 28, 2023

Dividend record date

Jun. 21, 2023

Rhino Assembly Company, LLC | Subsequent Events

Subsequent Event [Line Items]

Investment date

Apr. 04, 2023

Realized gain (loss) on investment

$ 2,077

Rhino Assembly Company, LLC | Second Lien Debt | Subsequent Events

Subsequent Event [Line Items]

Investments at cost

$ 14,850

Puget Collision LLC | First Lien Debt | Subsequent Events

Subsequent Event [Line Items]

Investment date

Apr. 28, 2023

Investments at cost

$ 2,500

Supplemental Dividend

Subsequent Event [Line Items]

Dividends to stockholders

$ 0.15

$ 0.08

$ 0.07

$ 0.17

$ 0.04

$ 0.06

$ 0.08

$ 0.07

Dividend payable date

Mar. 29, 2023

Dec. 16, 2022

Jun. 24, 2022

Mar. 25, 2022

Dec. 17, 2021

Sep. 28, 2021

Jun. 28, 2021

Mar. 26, 2021

Dividend record date

Mar. 22, 2023

Dec. 02, 2022

Jun. 10, 2022

Mar. 11, 2022

Dec. 03, 2021

Sep. 14, 2021

Jun. 14, 2021

Mar. 12, 2021

Supplemental Dividend | Subsequent Events

Subsequent Event [Line Items]

Dividends to stockholders

$ 0.19

Special Dividend

Subsequent Event [Line Items]

Dividends to stockholders

$ 0.10

$ 0.10

$ 0.05

$ 0.04

Dividend payable date

Dec. 16, 2022

Dec. 17, 2021

Sep. 28, 2021

Dividend record date

Mar. 22, 2023

Dec. 02, 2022

Dec. 03, 2021

Sep. 14, 2021

Special Dividend | Subsequent Events

Subsequent Event [Line Items]

Dividends to stockholders

0.10

Quarterly Dividend | Subsequent Events

Subsequent Event [Line Items]

Dividends to stockholders

$ 0.41

[1]	All debt investments are income producing, unless otherwise indicated. Equity investments are non-income producing unless otherwise noted.
[2]	Equity ownership may be held in shares or units of companies related to the portfolio companies.
[3]	See Note 3 to the consolidated financial statements for portfolio composition by geographic location.
[4]	(a) See Note 3 to the consolidated financial statements for portfolio composition by geographic location.
[5]	(b) Equity ownership may be held in shares or units of companies related to the portfolio companies.
[6]	(c) All debt investments are income producing, unless otherwise indicated. Equity investments are non-income producing unless otherwise noted.
[7]	Investment pledged as collateral for the Credit Facility and, as a result, is not directly available to the creditors of the Company to satisfy any obligations of the Company other than the Company's obligations under the Credit Facility (see Note 6 to the consolidated financial statements).
[8]	The disclosed commitment represents the unfunded amount as of March 31, 2023. The Company is earning 0.50% interest on the unfunded balance of the commitment. The interest rate disclosed represents the rate which will be earned if the commitment is funded.

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