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Fair Value of Financial Instruments - Summary of Significant Unobservable Inputs Used to Measure The Fair Value Of The Level 3 Portfolio Investments (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands | Mar. 31, 2024 USD ($) yr | Dec. 31, 2023 USD ($) yr
--- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 1,344,283 | $ 1,268,428
Debt investments | Discounted Cash Flows | Hypothetical Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 984,939 | $ 858,870
Debt investments | Discounted Cash Flows | Minimum | Hypothetical Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.114 | 0.116
Debt investments | Discounted Cash Flows | Maximum | Hypothetical Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.346 | 0.346
Debt investments | Discounted Cash Flows | Weighted Average | Hypothetical Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.166 | 0.173
Debt investments | Cost approximates fair value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 227,760 | $ 253,250
Debt investments | Transactions Precedent | Transaction Price |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments |  | 4,680
Debt investments | Scenario Analysis | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 66,298 | $ 97,573
Debt investments | Scenario Analysis | Minimum | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.02 | 0.05
Debt investments | Scenario Analysis | Maximum | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 1 | 1
Debt investments | Enterprise Value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 9,394 | $ 7,704
Equity investments | Market Approach | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 17,325 | $ 15,150
Equity investments | Market Approach | Minimum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.009 | 0.004
Equity investments | Market Approach | Minimum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.435 | 0.442
Equity investments | Market Approach | Minimum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 4.3 | 3
Equity investments | Market Approach | Minimum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 1 | 1
Equity investments | Market Approach | Maximum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.104 | 0.15
Equity investments | Market Approach | Maximum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 1.023 | 1.313
Equity investments | Market Approach | Maximum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 5 | 4.8
Equity investments | Market Approach | Maximum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 3.8 | 4
Equity investments | Market Approach | Weighted Average | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.032 | 0.037
Equity investments | Market Approach | Weighted Average | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.558 | 0.625
Equity investments | Market Approach | Weighted Average | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 3.9 | 4
Equity investments | Market Approach | Weighted Average | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 2.1 | 1.7
Warrants | Market Approach | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ 38,567 | $ 31,201
Warrants | Market Approach | Minimum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.003 | 0.004
Warrants | Market Approach | Minimum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.382 | 0.333
Warrants | Market Approach | Minimum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.04 | 0.029
Warrants | Market Approach | Minimum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 0.7 | 1
Warrants | Market Approach | Maximum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.104 | 0.15
Warrants | Market Approach | Maximum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 1.195 | 1.313
Warrants | Market Approach | Maximum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.052 | 0.048
Warrants | Market Approach | Maximum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 4.6 | 4.8
Warrants | Market Approach | Weighted Average | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.028 | 0.027
Warrants | Market Approach | Weighted Average | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.642 | 0.688
Warrants | Market Approach | Weighted Average | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.046 | 0.043
Warrants | Market Approach | Weighted Average | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | yr | 2.2 | 2.2

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- Definition Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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