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Fair Value of Investments - Schedule of Quantitative Information About Significant Unobservable Inputs of Level 3 Investments (Details)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 14,955,049,000 [1],[2] $ 16,470,893,000 [3],[4]
First-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 10,937,849,000 12,048,934,000
Second-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 674,223,000 848,575,000
Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 377,224,000 399,962,000
Specialty finance debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 171,254,000 157,297,000
Preferred    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 262,536,000 568,977,000
Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 714,693,000 644,304,000
Specialty finance equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 1,426,590,000 1,386,739,000
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 13,947,677,000 15,572,144,000
Level 3 | First-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 10,893,570,000 12,009,907,000
Level 3 | First-lien senior secured debt investments | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 10,556,228,000 $ 11,273,964,000
Level 3 | First-lien senior secured debt investments | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.104 0.096
Level 3 | First-lien senior secured debt investments | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.071 0.063
Level 3 | First-lien senior secured debt investments | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.238 0.201
Level 3 | First-lien senior secured debt investments | Transaction    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 179,499,000 $ 536,599,000
Level 3 | First-lien senior secured debt investments | Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.993 0.993
Level 3 | First-lien senior secured debt investments | Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.985 0.990
Level 3 | First-lien senior secured debt investments | Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.996 0.998
Level 3 | First-lien senior secured debt investments | Recovery Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 157,843,000  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.460  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.000  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.000  
Level 3 | First-lien senior secured debt investments | Collateral Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value:   $ 199,344,000
Level 3 | First-lien senior secured debt investments | Collateral Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   0.595
Level 3 | First-lien senior secured debt investments | Collateral Analysis | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   0.000
Level 3 | First-lien senior secured debt investments | Collateral Analysis | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   1.072
Level 3 | Second-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 674,223,000 $ 801,281,000
Level 3 | Second-lien senior secured debt investments | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 667,573,000 $ 801,281,000
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.226 0.189
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.105 0.097
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.470 0.624
Level 3 | Second-lien senior secured debt investments | Recovery Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 6,650,000  
Level 3 | Second-lien senior secured debt investments | Recovery Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.050  
Level 3 | Second-lien senior secured debt investments | Recovery Analysis | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.050  
Level 3 | Second-lien senior secured debt investments | Recovery Analysis | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.050  
Level 3 | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 377,224,000 $ 399,962,000
Level 3 | Unsecured Debt | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 367,642,000 $ 390,845,000
Level 3 | Unsecured Debt | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.138 0.126
Level 3 | Unsecured Debt | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.054 0.055
Level 3 | Unsecured Debt | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.225 0.176
Level 3 | Unsecured Debt | Market Approach    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 9,582,000 $ 9,117,000
Level 3 | Unsecured Debt | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 12.0 12.0
Level 3 | Unsecured Debt | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 12.0 12.0
Level 3 | Unsecured Debt | Market Approach | Maximum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 12.0 12.0
Level 3 | Specialty finance debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 171,254,000 $ 157,297,000
Level 3 | Specialty finance debt investments | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 171,254,000 $ 157,297,000
Level 3 | Specialty finance debt investments | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.123 0.116
Level 3 | Specialty finance debt investments | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.123 0.116
Level 3 | Specialty finance debt investments | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.123 0.116
Level 3 | Preferred    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 262,536,000 $ 568,977,000
Level 3 | Preferred | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 246,278,000 $ 559,595,000
Level 3 | Preferred | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.238 0.161
Level 3 | Preferred | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.129 0.116
Level 3 | Preferred | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.535 0.353
Level 3 | Preferred | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 16,000,000 $ 9,171,000
Level 3 | Preferred | Market Approach | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 258,000 $ 211,000
Level 3 | Preferred | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.5 128.9
Level 3 | Preferred | Market Approach | Weighted Average | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 13.3 11.3
Level 3 | Preferred | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.5 128.9
Level 3 | Preferred | Market Approach | Minimum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 13.3 11.3
Level 3 | Preferred | Market Approach | Maximum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.5 128.9
Level 3 | Preferred | Market Approach | Maximum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 13.3 11.3
Level 3 | Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 556,928,000 $ 520,542,000
Level 3 | Common Stock | Yield Analysis | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 14,618,000 $ 14,020,000
Level 3 | Common Stock | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.084 0.085
Level 3 | Common Stock | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.084 0.085
Level 3 | Common Stock | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.084 0.085
Level 3 | Common Stock | Market Approach | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value:   $ 21,679,000
Level 3 | Common Stock | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 478,092,000 388,838,000
Level 3 | Common Stock | Market Approach | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 45,892,000 45,461,000
Level 3 | Common Stock | Market Approach | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: 8,979,000 6,105,000
Level 3 | Common Stock | Market Approach | Gross Profit Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 168,000 $ 166,000
Level 3 | Common Stock | Market Approach | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   96.84
Level 3 | Common Stock | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 7.9 7.7
Level 3 | Common Stock | Market Approach | Weighted Average | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 11.1 10.7
Level 3 | Common Stock | Market Approach | Weighted Average | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.060 0
Level 3 | Common Stock | Market Approach | Weighted Average | Gross Profit Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.3 9.0
Level 3 | Common Stock | Market Approach | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   96.84
Level 3 | Common Stock | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 4.0 4.0
Level 3 | Common Stock | Market Approach | Minimum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 5.0 6.3
Level 3 | Common Stock | Market Approach | Minimum | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) (0.131) 0.000
Level 3 | Common Stock | Market Approach | Minimum | Gross Profit Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.3 9.0
Level 3 | Common Stock | Market Approach | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   96.84
Level 3 | Common Stock | Market Approach | Maximum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 27.8 17.9
Level 3 | Common Stock | Market Approach | Maximum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 47.5 13.0
Level 3 | Common Stock | Market Approach | Maximum | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.263 0.000
Level 3 | Common Stock | Market Approach | Maximum | Gross Profit Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 9.3 9.0
Level 3 | Common Stock | Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 8,485,000 $ 43,926,000
Level 3 | Common Stock | Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.492 1.000
Level 3 | Common Stock | Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.180 1.000
Level 3 | Common Stock | Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 2.002 1.000
Level 3 | Common Stock | Option Pricing Model | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 694,000 $ 347,000
Level 3 | Common Stock | Option Pricing Model | Weighted Average | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.700 0.700
Level 3 | Common Stock | Option Pricing Model | Minimum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.600 0.600
Level 3 | Common Stock | Option Pricing Model | Maximum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.700 0.700
Level 3 | Specialty finance equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 1,011,942,000 $ 1,114,178,000
Level 3 | Specialty finance equity investments | Yield Analysis | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 5,196,000 $ 6,657,000
Level 3 | Specialty finance equity investments | Yield Analysis | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.118 0.115
Level 3 | Specialty finance equity investments | Yield Analysis | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.118 0.115
Level 3 | Specialty finance equity investments | Yield Analysis | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.118 0.115
Level 3 | Specialty finance equity investments | Market Approach    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value:   $ 94,930,000
Level 3 | Specialty finance equity investments | Market Approach | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 94,975,000  
Level 3 | Specialty finance equity investments | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value:   607,284,000
Level 3 | Specialty finance equity investments | Market Approach | AUM Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 302,656,000 $ 403,170,000
Level 3 | Specialty finance equity investments | Market Approach | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.400  
Level 3 | Specialty finance equity investments | Market Approach | Weighted Average | AUM Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.0 1.1
Level 3 | Specialty finance equity investments | Market Approach | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.200  
Level 3 | Specialty finance equity investments | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average)   1.3
Level 3 | Specialty finance equity investments | Market Approach | Minimum | AUM Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.0 1.1
Level 3 | Specialty finance equity investments | Market Approach | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.500  
Level 3 | Specialty finance equity investments | Market Approach | Maximum | AUM Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.0  
Level 3 | Specialty finance equity investments | Book Multiple | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 607,054,000  
Level 3 | Specialty finance equity investments | Book Multiple | Weighted Average | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.2  
Level 3 | Specialty finance equity investments | Book Multiple | Minimum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.2  
Level 3 | Specialty finance equity investments | Book Multiple | Maximum | Yield Analysis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 1.2  
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments at fair value: $ 2,061,000 $ 2,137,000
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.200 0.200
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.200 0.200
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (Weighted Average) 0.200 0.200
[1] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on the Company’s restricted securities.
[2] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facilities and CLOs. See “Note 5 — Debt.”
[3] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on the Company’s restricted securities.
[4] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facilities and CLOs. See “Note 5 — Debt.”