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Organization, Business, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 2,449,272,000 $ 2,488,715,000
Senior debt and 1st lien notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 1,686,411,000 1,670,300,000
Subordinated debt and 2nd lien notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 165,455,000 238,215,000
Structured Product    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 79,548,000 93,038,000
Equity shares    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 409,129,000 374,704,000
Equity warrants    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 2,732,000 2,392,000
Royalty Rights    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 5,833,000  
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 2,244,908,000 2,237,531,000
Level 3 | Senior debt and 1st lien notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 1,625,501,000 1,593,797,000
Level 3 | Senior debt and 1st lien notes | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 1,323,618,000 $ 1,399,907,000
Level 3 | Senior debt and 1st lien notes | Yield Analysis | Minimum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.065 0.078
Level 3 | Senior debt and 1st lien notes | Yield Analysis | Maximum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.758 0.196
Level 3 | Senior debt and 1st lien notes | Yield Analysis | Weighted Average | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.105 0.117
Level 3 | Senior debt and 1st lien notes | Market Approach | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 50,535,000 $ 32,150,000
Level 3 | Senior debt and 1st lien notes | Market Approach | Minimum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.5 1.1
Level 3 | Senior debt and 1st lien notes | Market Approach | Maximum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 11.0 12.5
Level 3 | Senior debt and 1st lien notes | Market Approach | Weighted Average | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 6.3 3.7
Level 3 | Senior debt and 1st lien notes | Recent Transaction    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 247,508,000 $ 136,594,000
Level 3 | Senior debt and 1st lien notes | Recent Transaction | Minimum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.950 0.950
Level 3 | Senior debt and 1st lien notes | Recent Transaction | Maximum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1.000 1.000
Level 3 | Senior debt and 1st lien notes | Recent Transaction | Weighted Average | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.987 0.979
Level 3 | Senior debt and 1st lien notes | Valuation, Unadjusted Prices From Independent Pricing Services And Independent Indicative Broker Quotes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 3,840,000 $ 25,146,000
Level 3 | Subordinated debt and 2nd lien notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 153,703,000 223,798,000
Level 3 | Subordinated debt and 2nd lien notes | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 94,912,000 $ 167,250,000
Level 3 | Subordinated debt and 2nd lien notes | Yield Analysis | Minimum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.080 0.085
Level 3 | Subordinated debt and 2nd lien notes | Yield Analysis | Maximum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.186 0.189
Level 3 | Subordinated debt and 2nd lien notes | Yield Analysis | Weighted Average | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.127 0.135
Level 3 | Subordinated debt and 2nd lien notes | Market Approach | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 47,775,000 $ 39,826,000
Level 3 | Subordinated debt and 2nd lien notes | Market Approach | Minimum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.9 7.0
Level 3 | Subordinated debt and 2nd lien notes | Market Approach | Maximum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 22.4 12.3
Level 3 | Subordinated debt and 2nd lien notes | Market Approach | Weighted Average | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 11.7 8.2
Level 3 | Subordinated debt and 2nd lien notes | Recent Transaction    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 702,000 $ 5,875,000
Level 3 | Subordinated debt and 2nd lien notes | Recent Transaction | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.980  
Level 3 | Subordinated debt and 2nd lien notes | Recent Transaction | Minimum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input   0.980
Level 3 | Subordinated debt and 2nd lien notes | Recent Transaction | Maximum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input   1.000
Level 3 | Subordinated debt and 2nd lien notes | Recent Transaction | Weighted Average | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.980 0.993
Level 3 | Subordinated debt and 2nd lien notes | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 3,791,000  
Level 3 | Subordinated debt and 2nd lien notes | Expected Recovery | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 3,790,600  
Level 3 | Subordinated debt and 2nd lien notes | Expected Recovery | Weighted Average | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 3,790,600  
Level 3 | Subordinated debt and 2nd lien notes | Valuation, Unadjusted Prices From Independent Pricing Services And Independent Indicative Broker Quotes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 6,523,000 $ 10,847,000
Level 3 | Structured Product    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 48,664,000 42,972,000
Level 3 | Structured Product | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 28,904,000 $ 30,529,000
Level 3 | Structured Product | Yield Analysis | Minimum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.076 0.092
Level 3 | Structured Product | Yield Analysis | Maximum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.103 0.103
Level 3 | Structured Product | Yield Analysis | Weighted Average | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.082 0.097
Level 3 | Structured Product | Recent Transaction    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 5,250,000  
Level 3 | Structured Product | Recent Transaction | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1.000  
Level 3 | Structured Product | Recent Transaction | Weighted Average | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1.000  
Level 3 | Structured Product | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 1,733,000  
Level 3 | Structured Product | Expected Recovery | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1,733,300  
Level 3 | Structured Product | Expected Recovery | Weighted Average | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1,733,300  
Level 3 | Structured Product | Valuation, Unadjusted Prices From Independent Pricing Services And Independent Indicative Broker Quotes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 12,777,000 $ 12,443,000
Level 3 | Equity shares    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 408,475,000 374,572,000
Level 3 | Equity shares | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 30,302,000 $ 8,788,000
Level 3 | Equity shares | Yield Analysis | Minimum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.108 0.146
Level 3 | Equity shares | Yield Analysis | Maximum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.305  
Level 3 | Equity shares | Yield Analysis | Weighted Average | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.157 0.146
Level 3 | Equity shares | Market Approach | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 339,142,000 $ 328,210,000
Level 3 | Equity shares | Market Approach | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 1,353,000 $ 1,771,000
Level 3 | Equity shares | Market Approach | Minimum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.5 4.5
Level 3 | Equity shares | Market Approach | Minimum | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 5.5 6.5
Level 3 | Equity shares | Market Approach | Maximum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 28.5 30.0
Level 3 | Equity shares | Market Approach | Maximum | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 8.8 9.5
Level 3 | Equity shares | Market Approach | Weighted Average | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 12.9 10.6
Level 3 | Equity shares | Market Approach | Weighted Average | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 6.0 6.9
Level 3 | Equity shares | Recent Transaction    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 10,008,000 $ 12,947,000
Level 3 | Equity shares | Recent Transaction | Minimum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1.00 1.00
Level 3 | Equity shares | Recent Transaction | Maximum | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1,847.58 10.00
Level 3 | Equity shares | Recent Transaction | Weighted Average | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 1,525.9 9.5
Level 3 | Equity shares | Discounted Cash Flow Analysis | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 16,852,000 $ 12,159,000
Input 0.129 0.142
Level 3 | Equity shares | Discounted Cash Flow Analysis | Weighted Average | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.129 0.142
Level 3 | Equity shares | Net Asset Approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 3,875,000 $ 3,196,000
Level 3 | Equity shares | Net Asset Approach | Liabilities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 96,678,300 55,281,800
Level 3 | Equity shares | Net Asset Approach | Weighted Average | Liabilities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 96,678,300 55,281,800
Level 3 | Equity shares | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 59,000 $ 3,000
Level 3 | Equity shares | Expected Recovery | Minimum | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 2,500 2,500
Level 3 | Equity shares | Expected Recovery | Maximum | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 56,900  
Level 3 | Equity shares | Expected Recovery | Weighted Average | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 54,600 2,500
Level 3 | Equity shares | Valuation, Unadjusted Prices From Independent Pricing Services And Independent Indicative Broker Quotes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 6,884,000 $ 7,498,000
Level 3 | Equity warrants    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value 2,732,000 2,392,000
Level 3 | Equity warrants | Market Approach | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 2,729,000 $ 2,389,000
Level 3 | Equity warrants | Market Approach | Minimum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.5 6.3
Level 3 | Equity warrants | Market Approach | Maximum | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 11.8 12.5
Level 3 | Equity warrants | Market Approach | Weighted Average | Adjusted EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 8.1 7.3
Level 3 | Equity warrants | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 3,000 $ 3,000
Level 3 | Equity warrants | Expected Recovery | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 3,000.0 3,000.0
Level 3 | Equity warrants | Expected Recovery | Weighted Average | Expected Recovery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 3,000.0 3,000.0
Level 3 | Royalty Rights | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total investments at fair value $ 5,833,000  
Level 3 | Royalty Rights | Yield Analysis | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.210  
Level 3 | Royalty Rights | Yield Analysis | Minimum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.186  
Level 3 | Royalty Rights | Yield Analysis | Maximum | Market Yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Input 0.264