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Net Assets - Distributions Declared and Payable (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 27, 2023 | Sep. 26, 2023 | Jun. 27, 2023 | Mar. 28, 2023 | Dec. 20, 2022 | Sep. 28, 2022 | Sep. 26, 2022 | Jun. 24, 2022 | Mar. 25, 2022 | Dec. 21, 2021 | Sep. 23, 2021 | Jun. 23, 2021 | Mar. 18, 2021 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per Share Amount (in dollars per share) |  | $ 0.60 | $ 0.57 | $ 0.50 | $ 0.50 | $ 0.47 | $ 0.47 | $ 0.47 | $ 0.48 | $ 0.57 | $ 0.56 | $ 0.49 | $ 0.45 | $ 1.67 | $ 1.42 | $ 1.92 | $ 2.07
Total Amount |  | $ 43,211 | $ 40,735 | $ 35,377 | $ 32,770 | $ 30,611 | $ 30,611 | $ 28,601 | $ 27,455 | $ 29,691 | $ 20,080 | $ 13,974 | $ 8,570 | $ 119,323 | $ 86,667 | $ 119,437 | $ 72,315
Supplemental distribution (in dollars per share) | $ 0.10 |  | $ 0.07 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.11

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