Fair Value of Financial Instruments - Schedule of Quantitative Information Regarding Level 3 Fair Value Measurements (Details) - Level 3 $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 1,012,774	$ 1,020,800
Senior Secured Term Loans | Discounted Cash Flow Analysis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 897,222	$ 904,739
Senior Secured Term Loans | Discounted Cash Flow Analysis | Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.106	0.108
Senior Secured Term Loans | Discounted Cash Flow Analysis | Minimum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.108	0.108
Senior Secured Term Loans | Discounted Cash Flow Analysis | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0044	0.0029
Senior Secured Term Loans | Discounted Cash Flow Analysis | Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.25	0.222
Senior Secured Term Loans | Discounted Cash Flow Analysis | Maximum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.199	0.199
Senior Secured Term Loans | Discounted Cash Flow Analysis | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0814	0.0749
Senior Secured Term Loans | Discounted Cash Flow Analysis | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.154	0.15
Senior Secured Term Loans | Discounted Cash Flow Analysis | Weighted Average | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.137	0.136
Senior Secured Term Loans | Discounted Cash Flow Analysis | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0386	0.0366
Senior Secured Term Loans | PWERM
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 57,955	$ 59,360
Senior Secured Term Loans | PWERM | Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.239	0.203
Senior Secured Term Loans | PWERM | Minimum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.108	0.108
Senior Secured Term Loans | PWERM | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0096	0.0095
Senior Secured Term Loans | PWERM | Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.355	0.465
Senior Secured Term Loans | PWERM | Maximum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.186	0.297
Senior Secured Term Loans | PWERM | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0268	0.0316
Senior Secured Term Loans | PWERM | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.279	0.288
Senior Secured Term Loans | PWERM | Weighted Average | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.128	0.173
Senior Secured Term Loans | PWERM | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0186	0.0189
Second Lien Term Loans | Discounted Cash Flow Analysis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 14,388	$ 14,399
Second Lien Term Loans | Discounted Cash Flow Analysis | Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.167	0.161
Second Lien Term Loans | Discounted Cash Flow Analysis | Minimum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.131	0.131
Second Lien Term Loans | Discounted Cash Flow Analysis | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0263
Second Lien Term Loans | Discounted Cash Flow Analysis | Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.167	0.161
Second Lien Term Loans | Discounted Cash Flow Analysis | Maximum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.131	0.131
Second Lien Term Loans | Discounted Cash Flow Analysis | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0263
Second Lien Term Loans | Discounted Cash Flow Analysis | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.167	0.161
Second Lien Term Loans | Discounted Cash Flow Analysis | Weighted Average | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.131	0.131
Second Lien Term Loans | Discounted Cash Flow Analysis | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0263
Convertible Note | PWERM
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 1,023	$ 1,357
Convertible Note | PWERM | Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.239	0.45
Convertible Note | PWERM | Minimum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.108	0.108
Convertible Note | PWERM | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0227
Convertible Note | PWERM | Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.239	0.45
Convertible Note | PWERM | Maximum | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.108	0.108
Convertible Note | PWERM | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0227
Convertible Note | PWERM | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.239	0.45
Convertible Note | PWERM | Weighted Average | Origination Yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.108	0.108
Convertible Note | PWERM | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt securities, measurement input	0.0227
Preferred Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 121	$ 120
Preferred Stock | PWERM
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 25,786	$ 26,038
Preferred Stock | PWERM | Minimum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.047	0.047
Preferred Stock | PWERM | Minimum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.40	0.40
Preferred Stock | PWERM | Minimum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year 9 months 18 days	2 years
Preferred Stock | PWERM | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0403	0.0446
Preferred Stock | PWERM | Maximum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.047	0.047
Preferred Stock | PWERM | Maximum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.40	0.40
Preferred Stock | PWERM | Maximum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year 9 months 18 days	2 years
Preferred Stock | PWERM | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0403	0.0446
Preferred Stock | PWERM | Weighted Average | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.047	0.047
Preferred Stock | PWERM | Weighted Average | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.40	0.40
Preferred Stock | PWERM | Weighted Average | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year 9 months 18 days	2 years
Preferred Stock | PWERM | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0403	0.0446
Preferred Stock | Waterfall Approach
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 127	$ 127
Preferred Stock | Waterfall Approach | Minimum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	3 years	3 years
Preferred Stock | Waterfall Approach | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.04	0.04
Preferred Stock | Waterfall Approach | Maximum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	3 years	3 years
Preferred Stock | Waterfall Approach | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.04	0.04
Preferred Stock | Waterfall Approach | Weighted Average | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	3 years	3 years
Preferred Stock | Waterfall Approach | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.04	0.04
Common Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 15	$ 16
Common Stock | Option Pricing Model
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 124	$ 856
Common Stock | Option Pricing Model | Minimum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.05	0.043
Common Stock | Option Pricing Model | Minimum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.60	0.35
Common Stock | Option Pricing Model | Minimum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year	5 years
Common Stock | Option Pricing Model | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0249	0.0328
Common Stock | Option Pricing Model | Maximum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.05	0.043
Common Stock | Option Pricing Model | Maximum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.60	0.35
Common Stock | Option Pricing Model | Maximum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year	5 years
Common Stock | Option Pricing Model | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0249	0.0328
Common Stock | Option Pricing Model | Weighted Average | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.05	0.043
Common Stock | Option Pricing Model | Weighted Average | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.60	0.35
Common Stock | Option Pricing Model | Weighted Average | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, outstanding term	1 year	5 years
Common Stock | Option Pricing Model | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0.0249	0.0328
Equity Interest | PWERM
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 950	$ 950
Equity Interest | PWERM | Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0	0.20
Equity Interest | PWERM | Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0	0.20
Equity Interest | PWERM | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Equity securities, measurement input	0	0.20
Warrants | PWERM
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 4,116	$ 3,912
Warrants | Waterfall Approach
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 1,520	$ 1,851
Warrants | Waterfall Approach | Minimum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	3 years	3 years
Warrants | Waterfall Approach | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.0211	0.0258
Warrants | Waterfall Approach | Maximum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	3 years	3 years
Warrants | Waterfall Approach | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.04	0.04
Warrants | Waterfall Approach | Weighted Average | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	3 years	3 years
Warrants | Waterfall Approach | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.0342	0.0339
Warrants | Option Pricing Model
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investments	$ 9,427	$ 7,075
Warrants | Option Pricing Model | Minimum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.042	0.038
Warrants | Option Pricing Model | Minimum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.25	0.25
Warrants | Option Pricing Model | Minimum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	6 months	9 months 18 days
Warrants | Option Pricing Model | Minimum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.0096	0.0095
Warrants | Option Pricing Model | Maximum | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.053	0.053
Warrants | Option Pricing Model | Maximum | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	1.25	1.088
Warrants | Option Pricing Model | Maximum | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	7 years 10 months 24 days	8 years 2 months 12 days
Warrants | Option Pricing Model | Maximum | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.1028	0.0749
Warrants | Option Pricing Model | Weighted Average | Risk-free Interest Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.046	0.045
Warrants | Option Pricing Model | Weighted Average | Average Industry Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.492	0.454
Warrants | Option Pricing Model | Weighted Average | Estimated Time to Exit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, term	2 years 4 months 24 days	3 years 1 month 6 days
Warrants | Option Pricing Model | Weighted Average | Revenue Multiples
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.0456	0.0395