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v3.25.0.1

Selected Quarterly Financial Data (unaudited) - Schedule of Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total investment income | $ 37,457 |  | $ 38,382 |  | $ 35,664 |  | $ 34,651 |  | $ 36,311 |  | $ 34,185 |  | $ 30,558 |  | $ 29,056 |  | $ 27,474 | $ 24,992 | $ 21,153 | $ 20,518 | $ 146,154 |  | $ 130,110 |  | $ 94,137 |  |  |  |  |  |  |  |
Net investment income | 18,648 |  | 21,411 |  | 16,950 |  | 17,627 |  | 16,939 |  | 16,660 |  | 16,784 |  | 14,723 |  | 12,484 | 12,719 | 11,008 | 10,338 | $ 74,636 |  | $ 65,106 |  | $ 46,549 |  |  |  |  |  |  |  |
Net increase (decrease) in net assets resulting from operations | $ 17,593 |  | $ 16,477 |  | $ 24,099 |  | $ 20,123 |  | $ 26,430 |  | $ 24,299 |  | $ 10,915 |  | $ 15,489 |  | $ 4,723 | $ 11,428 | $ 7,981 | $ 11,690 |  |  |  |  |  |  |  |  |  |  |  |  |
Net investment income per share-basic | $ 0.55 |  | $ 0.64 |  | $ 0.53 |  | $ 0.57 |  | $ 0.58 |  | $ 0.63 |  | $ 0.67 |  | $ 0.59 |  | $ 0.51 | $ 0.52 | $ 0.45 | $ 0.42 | $ 2.29 |  | $ 2.47 |  | $ 1.9 |  |  |  |  |  |  |  |
Net investment income per share-diluted | 0.55 |  | 0.64 |  | 0.53 |  | 0.57 |  | 0.58 |  | 0.63 |  | 0.67 |  | 0.59 |  | 0.51 | 0.52 | 0.45 | 0.42 | 2.29 |  | 2.47 |  | 1.9 |  |  |  |  |  |  |  |
Net increase in net assets resulting from operations per share - basic | 0.52 |  | 0.49 |  | 0.75 |  | 0.65 |  | 0.91 |  | 0.91 |  | 0.44 |  | 0.62 |  | 0.19 | 0.47 | 0.33 | 0.48 | 2.4 |  | 2.93 |  | 1.46 |  |  |  |  |  |  |  |
Net increase in net assets resulting from operations per share - diluted | 0.52 |  | 0.49 |  | 0.75 |  | 0.65 |  | 0.91 |  | 0.91 |  | 0.44 |  | 0.62 |  | 0.19 | 0.47 | 0.33 | 0.48 | 2.4 |  | 2.93 |  | 1.46 |  |  |  |  |  |  |  |
Net asset value per share at end of period | $ 19.33 | [1] | $ 19.42 | [1] | $ 19.5 | [1] | $ 19.36 | [1] | $ 19.37 | [1] | $ 19.28 | [1] | $ 19.13 | [1] | $ 19.39 | [1] | $ 19.43 | $ 19.41 | $ 19.8 | $ 19.91 | $ 19.33 | [1] | $ 19.37 | [1] | $ 19.43 | $ 19.96 | $ 16.81 | $ 16.85 | $ 16.47 | $ 16.05 | $ 15.76 | $ 15.17 | $ 15.16
[1] | Net asset value per share is determined as of the last day in the relevant quarter and therefore may not reflect the net asset value per share on the date of the high and low sales prices. The net asset values shown are based on outstanding shares at the end of each period.

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