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Investments - Schedule of Investment Interest Income and Fee Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | $ 434,425 | $ 307,258 | $ 253,360
Total fee income | 26,243 | 14,430 | 27,616
Contractual interest income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | 351,883 | 249,375 | 200,682
Exit fee interest income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | 45,747 | 32,063 | 37,494
PIK interest income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | 24,670 | 20,455 | 11,210
Dividend income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | 1,400 | 0 | 0
Other investment income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total interest and dividend income | 10,725 | 5,365 | 3,974
Recurring fee income |  |  |
Schedule Of Investments [Line Items] |  |  |
Total fee income | 8,835 | 7,834 | 7,458
Fee income - expired commitments |  |  |
Schedule Of Investments [Line Items] |  |  |
Total fee income | 1,695 | 1,502 | 3,031
Accelerated fee income - early repayments |  |  |
Schedule Of Investments [Line Items] |  |  |
Total fee income | $ 15,713 | $ 5,094 | $ 17,127

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- Definition Amount of fee income including, but not limited to, managerial assistance, servicing of investment, and origination and commitment fees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(1)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 + Details
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 45 -Paragraph 39 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480228/946-830-45-39 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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