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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, 2023 USD ($) yr | Dec. 31, 2022 USD ($) yr
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ | $ 1,088,521 | $ 1,093,063
Market Approach | Minimum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.4
Market Approach | Maximum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 3.2
Market Approach | Weighted Average | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 2.2
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 | $ | $ 929,280 | $ 872,022
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 | 0.132 | 0.117
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 | 0.297 | 0.285
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 | 0.179 | 0.174
Debt investments | Originated Within the Past Three Months | Origination Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ | $ 93,891 | $ 156,281
Debt investments | Originated Within the Past Three Months | Minimum | Origination Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.085 | 0.090
Debt investments | Originated Within the Past Three Months | Maximum | Origination Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.164 | 0.155
Debt investments | Originated Within the Past Three Months | Weighted Average | Origination Market Yield |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.132 | 0.132
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 | $ | $ 23,927 | $ 17,838
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 | 0.050 | 0.050
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 | 1.000 | 0.800
Equity investments | Transactions Precedent | Transaction Price |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ |  | $ 2,688
Equity investments | Market Approach | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ | $ 15,454 | $ 12,651
Equity investments | Market Approach | Minimum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.010 | 0.9
Equity investments | Market Approach | Minimum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.4 | 0.4
Equity investments | Market Approach | Minimum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.409 | 0.333
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 | 0.015 | 0.029
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 | 0.2 |
Equity investments | Market Approach | Maximum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.070 | 8.0
Equity investments | Market Approach | Maximum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 4.3 | 5.9
Equity investments | Market Approach | Maximum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.873 | 0.980
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 | 0.041 | 0.042
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 | 4.5 |
Equity investments | Market Approach | Weighted Average | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.019 | 2.0
Equity investments | Market Approach | Weighted Average | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.012 | 1.2
Equity investments | Market Approach | Weighted Average | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.654 | 0.518
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 | 0.035 | 0.032
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 | 2.7 |
Equity investments | Black Scholes Option Pricing Model | Minimum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 1.9
Equity investments | Black Scholes Option Pricing Model | Maximum | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 4.8
Equity investments | Black Scholes Option Pricing Model | Weighted Average | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 3.0
Equity investments | Other | Minimum | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.200
Equity investments | Other | Maximum | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.800
Warrants | Market Approach | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ | $ 25,701 | $ 30,442
Warrants | Market Approach | Minimum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.3 |
Warrants | Market Approach | Minimum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.3 | 0.2
Warrants | Market Approach | Minimum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.333 | 0.451
Warrants | Market Approach | Minimum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.005 |
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 | 0.1 | 0.1
Warrants | Market Approach | Minimum | Company Specific Adjustment |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.187
Warrants | Market Approach | Maximum | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 4.9 |
Warrants | Market Approach | Maximum | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 8.0 | 8.5
Warrants | Market Approach | Maximum | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 1.052 | 1.022
Warrants | Market Approach | Maximum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.040 |
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 | 5.0 | 5.0
Warrants | Market Approach | Maximum | Company Specific Adjustment |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.300
Warrants | Market Approach | Weighted Average | Revenue Multiple Only |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.035 |
Warrants | Market Approach | Weighted Average | Revenue Multiple |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.018 | 1.8
Warrants | Market Approach | Weighted Average | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.612 | 0.668
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 | 0.028 | 0.027
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 | 2.3 | 2.3
Warrants | Market Approach | Weighted Average | Company Specific Adjustment |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.287 | 0.283
Warrants | Black Scholes Option Pricing Model | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ | $ 268 | $ 547
Warrants | Black Scholes Option Pricing Model | Minimum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.005
Warrants | Black Scholes Option Pricing Model | Maximum | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.045
Warrants | Black Scholes Option Pricing Model | Weighted Average | Volatility |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.654 | 0.654
Warrants | Black Scholes Option Pricing Model | Weighted Average | Risk-Free Interest Rate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 0.038 | 0.041
Warrants | Black Scholes Option Pricing Model | Weighted Average | Estimated Time to Exit (in years) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range | 1.5 | 3.7
Warrants | Black Scholes Option Pricing Model | Weighted Average | Discount for Lack of Marketability |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Range |  | 0.246
Warrants | Other | Probability Weighting of Alternative Outcomes |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Total Level 3 Investments | $ |  | $ 594

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