v3.26.1
Portfolio Investments - Unobservable Inputs Used in Fair Value Measurement of Level 3 Investments (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 6,342,558 [1] $ 6,673,516 [2]
Subordinated Structured Notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 2,794 35,002
Unsecured Debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 5,195 5,403
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,341,325 6,591,431
Level 3 | Debt Securities, First Lien 1 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,387,300 $ 1,605,991
Level 3 | Debt Securities, First Lien 1 | Discounted cash flow | Minimum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.080 0.078
Level 3 | Debt Securities, First Lien 1 | Discounted cash flow | Maximum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.240 0.289
Level 3 | Debt Securities, First Lien 1 | Discounted cash flow | Weighted Average | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.120 0.118
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 876,859 $ 902,617
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.065 0.065
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Minimum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.055 0.053
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.105 0.103
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Maximum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.083 0.083
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.073 0.073
Level 3 | Debt Securities, First Lien 2 | Discounted cash flow | Weighted Average | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.061 0.060
Level 3 | Debt Securities, First Lien 3 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.113 0.145
Level 3 | Debt Securities, First Lien 3 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.160 0.388
Level 3 | Debt Securities, First Lien 3 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.133 0.172
Level 3 | Debt Securities, First Lien 3 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 655,124 $ 630,095
Level 3 | Debt Securities, First Lien 3 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 5.3 4.8
Level 3 | Debt Securities, First Lien 3 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 12.5 12.8
Level 3 | Debt Securities, First Lien 3 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 9.7 10.6
Level 3 | Debt Securities, First Lien 4 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 506,062 $ 452,172
Level 3 | Debt Securities, First Lien 4 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.8  
Level 3 | Debt Securities, First Lien 4 | Market approach | Minimum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.0
Level 3 | Debt Securities, First Lien 4 | Market approach | Minimum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   8.0
Level 3 | Debt Securities, First Lien 4 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 10.0  
Level 3 | Debt Securities, First Lien 4 | Market approach | Maximum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.5
Level 3 | Debt Securities, First Lien 4 | Market approach | Maximum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   12.5
Level 3 | Debt Securities, First Lien 4 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.4  
Level 3 | Debt Securities, First Lien 4 | Market approach | Weighted Average | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.5
Level 3 | Debt Securities, First Lien 4 | Market approach | Weighted Average | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   12.5
Level 3 | Debt Securities, First Lien 5 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 460,264 $ 351,480
Level 3 | Debt Securities, First Lien 5 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   5.0
Level 3 | Debt Securities, First Lien 5 | Market approach | Minimum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.5  
Level 3 | Debt Securities, First Lien 5 | Market approach | Minimum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.8  
Level 3 | Debt Securities, First Lien 5 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   11.5
Level 3 | Debt Securities, First Lien 5 | Market approach | Maximum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.0  
Level 3 | Debt Securities, First Lien 5 | Market approach | Maximum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 13.3  
Level 3 | Debt Securities, First Lien 5 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   9.8
Level 3 | Debt Securities, First Lien 5 | Market approach | Weighted Average | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.0  
Level 3 | Debt Securities, First Lien 5 | Market approach | Weighted Average | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 13.3  
Level 3 | Debt Securities, First Lien 6 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 307,175 $ 236,073
Level 3 | Debt Securities, First Lien 6 | Market approach | Minimum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.3 0.3
Level 3 | Debt Securities, First Lien 6 | Market approach | Maximum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.0 2.0
Level 3 | Debt Securities, First Lien 6 | Market approach | Weighted Average | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.5 1.7
Level 3 | Debt Securities, First Lien 7 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 56,537 $ 78,736
Level 3 | Debt Securities, First Lien 7 | Market approach | Minimum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.9 1.4
Level 3 | Debt Securities, First Lien 7 | Market approach | Maximum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.6 2.2
Level 3 | Debt Securities, First Lien 7 | Market approach | Weighted Average | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.3 2.2
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 54,739
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Minimum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.131  
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.060
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Maximum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.131  
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.080
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Weighted Average | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.131  
Level 3 | Debt Securities, First Lien 8 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.060
Level 3 | Debt Securities, First Lien 8 | Enterprise market & discounted cash flow approach and option pricing model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 18,034  
Level 3 | Debt Securities, First Lien 8 | Option Pricing Model | Minimum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.500  
Level 3 | Debt Securities, First Lien 8 | Option Pricing Model | Maximum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.600  
Level 3 | Debt Securities, First Lien 8 | Option Pricing Model | Weighted Average | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.600  
Level 3 | Debt Securities, First Lien 9 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.100 0.155
Level 3 | Debt Securities, First Lien 9 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.200 0.310
Level 3 | Debt Securities, First Lien 9 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.150 0.178
Level 3 | Debt Securities, First Lien 9 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 49,114
Level 3 | Debt Securities, First Lien 9 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 11,012  
Level 3 | Debt Securities, First Lien 9 | Market approach | Minimum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.4
Level 3 | Debt Securities, First Lien 9 | Market approach | Maximum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   1.6
Level 3 | Debt Securities, First Lien 9 | Market approach | Weighted Average | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.9
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Minimum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.264
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.183  
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Maximum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.264
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.203  
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Weighted Average | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.264
Level 3 | Debt Securities, First Lien 10 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.183  
Level 3 | Debt Securities, First Lien 10 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 9,375  
Level 3 | Debt Securities, First Lien 10 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   8.0
Level 3 | Debt Securities, First Lien 10 | Market approach | Minimum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.1  
Level 3 | Debt Securities, First Lien 10 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   9.0
Level 3 | Debt Securities, First Lien 10 | Market approach | Maximum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.5  
Level 3 | Debt Securities, First Lien 10 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   9.0
Level 3 | Debt Securities, First Lien 10 | Market approach | Weighted Average | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 1.5  
Level 3 | Debt Securities, First Lien 10 | Enterprise market & discounted cash flow approach and option pricing model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 30,673
Level 3 | Debt Securities, First Lien 10 | Option Pricing Model | Minimum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.450
Level 3 | Debt Securities, First Lien 10 | Option Pricing Model | Maximum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.550
Level 3 | Debt Securities, First Lien 10 | Option Pricing Model | Weighted Average | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.550
Level 3 | Debt Securities, First Lien 11 | Discounted cash flow | Minimum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.172
Level 3 | Debt Securities, First Lien 11 | Discounted cash flow | Maximum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.172
Level 3 | Debt Securities, First Lien 11 | Discounted cash flow | Weighted Average | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.172
Level 3 | Debt Securities, First Lien 11 | Enterprise market & discounted cash flow approach and option pricing model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 11,852
Level 3 | Debt Securities, First Lien 11 | Option Pricing Model | Minimum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.450
Level 3 | Debt Securities, First Lien 11 | Option Pricing Model | Maximum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.550
Level 3 | Debt Securities, First Lien 11 | Option Pricing Model | Weighted Average | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.550
Level 3 | Debt Securities, First Lien 12 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 10,663
Level 3 | Debt Securities, First Lien 12 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.100
Level 3 | Debt Securities, First Lien 12 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.300
Level 3 | Debt Securities, First Lien 12 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.153
Level 3 | Debt Securities, First Lien 13 | Option Pricing Model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 5,922
Level 3 | Debt Securities, First Lien 13 | Option Pricing Model | Minimum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.300
Level 3 | Debt Securities, First Lien 13 | Option Pricing Model | Maximum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.400
Level 3 | Debt Securities, First Lien 13 | Option Pricing Model | Weighted Average | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.400
Level 3 | Debt Securities, Second Lien 1 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 480,118 $ 651,091
Level 3 | Debt Securities, Second Lien 1 | Discounted cash flow | Minimum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.114 0.110
Level 3 | Debt Securities, Second Lien 1 | Discounted cash flow | Maximum | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.577 0.485
Level 3 | Debt Securities, Second Lien 1 | Discounted cash flow | Weighted Average | Market yield    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.170 0.156
Level 3 | Debt Securities, Second Lien 2 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 61,802  
Level 3 | Debt Securities, Second Lien 2 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.3  
Level 3 | Debt Securities, Second Lien 2 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 7.3  
Level 3 | Debt Securities, Second Lien 2 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 7.3  
Level 3 | Debt Securities, Second Lien 2 | Valuation Approach, Enterprise Value Waterfall    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 54,997
Level 3 | Debt Securities, Second Lien 3 | Discounted cash flow | Minimum | Equity rates of return    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.250  
Level 3 | Debt Securities, Second Lien 3 | Discounted cash flow | Maximum | Equity rates of return    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.300  
Level 3 | Debt Securities, Second Lien 3 | Discounted cash flow | Weighted Average | Equity rates of return    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.250  
Level 3 | Debt Securities, Second Lien 3 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 21,402  
Level 3 | Debt Securities, Second Lien 3 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 9.3  
Level 3 | Debt Securities, Second Lien 3 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 9.8  
Level 3 | Debt Securities, Second Lien 3 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 9.5  
Level 3 | Debt Securities, Second Lien 3 | Asset recovery analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 12,897
Level 3 | Debt Securities, Second Lien 4 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.113 0.145
Level 3 | Debt Securities, Second Lien 4 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.133 0.165
Level 3 | Debt Securities, Second Lien 4 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.123 0.155
Level 3 | Debt Securities, Second Lien 4 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 8,429 $ 7,387
Level 3 | Debt Securities, Second Lien 4 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 5.3 4.8
Level 3 | Debt Securities, Second Lien 4 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.0 7.8
Level 3 | Debt Securities, Second Lien 4 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.6 6.3
Level 3 | Debt Securities, Second Lien 5 | Asset recovery analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 7,416  
Level 3 | Subordinated Structured Notes    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 2,794 $ 35,002
Level 3 | Subordinated Structured Notes | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,794 $ 35,002
Level 3 | Subordinated Structured Notes | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.138 0.160
Level 3 | Subordinated Structured Notes | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.139 0.602
Level 3 | Subordinated Structured Notes | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.139 0.177
Level 3 | Unsecured Debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,195 $ 5,403
Level 3 | Unsecured Debt | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,195 $ 5,403
Level 3 | Unsecured Debt | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 5.3 5.8
Level 3 | Unsecured Debt | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.8 7.0
Level 3 | Unsecured Debt | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.8 7.0
Level 3 | Preferred Equity 1 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 158,791 $ 89,912
Level 3 | Preferred Equity 1 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.5 4.3
Level 3 | Preferred Equity 1 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 10.0 11.3
Level 3 | Preferred Equity 1 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.7 8.9
Level 3 | Preferred Equity 2 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.0 3.3
Level 3 | Preferred Equity 2 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 7.5 6.8
Level 3 | Preferred Equity 2 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 7.2 5.3
Level 3 | Preferred Equity 2 | Option Pricing Model | Minimum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.550 0.550
Level 3 | Preferred Equity 2 | Option Pricing Model | Maximum | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.700 0.700
Level 3 | Preferred Equity 2 | Option Pricing Model | Weighted Average | Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.669 0.652
Level 3 | Preferred Equity 2 | Enterprise market cash flow approach and option pricing model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 35,496 $ 21,092
Level 3 | Preferred Equity 3 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.060
Level 3 | Preferred Equity 3 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.080
Level 3 | Preferred Equity 3 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.060
Level 3 | Preferred Equity 3 | Enterprise market cash flow approach and option pricing model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 10,914
Level 3 | Preferred Stock 4 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 6,697
Level 3 | Preferred Stock 4 | Market approach | Minimum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.3
Level 3 | Preferred Stock 4 | Market approach | Maximum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   2.0
Level 3 | Preferred Stock 4 | Market approach | Weighted Average | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   1.1
Level 3 | Liquidation Trust    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 6,500
Level 3 | Liquidation Trust | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 12,264  
Level 3 | Common Equity/Interests/Warrants 1 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 503,988 $ 454,847
Level 3 | Common Equity/Interests/Warrants 1 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.5 4.5
Level 3 | Common Equity/Interests/Warrants 1 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 11.3 11.5
Level 3 | Common Equity/Interests/Warrants 1 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.1 10.2
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 354,269
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.065
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Minimum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.053
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.103
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Maximum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.083
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.073
Level 3 | Common Equity/Interests/Warrants 2 | Discounted cash flow | Weighted Average | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.060
Level 3 | Common Equity/Interests/Warrants 2 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 500,514  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Minimum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.5  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Minimum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 8.8  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Maximum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.0  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Maximum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 13.3  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Weighted Average | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 4.0  
Level 3 | Common Equity/Interests/Warrants 2 | Market approach | Weighted Average | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 13.3  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 187,771  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.065  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Minimum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.055  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.105  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Maximum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.083  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.073  
Level 3 | Common Equity/Interests/Warrants 3 | Discounted cash flow | Weighted Average | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.061  
Level 3 | Common Equity/Interests/Warrants 3 | Market approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 308,346
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Minimum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.0
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Minimum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   8.0
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Maximum | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.5
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Maximum | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   12.5
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Weighted Average | Tangible book value multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   3.5
Level 3 | Common Equity/Interests/Warrants 3 | Market approach | Weighted Average | Earnings multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   12.5
Level 3 | Common Equity/Interests/Warrants 4 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 20,720  
Level 3 | Common Equity/Interests/Warrants 4 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.160
Level 3 | Common Equity/Interests/Warrants 4 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.388
Level 3 | Common Equity/Interests/Warrants 4 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.368
Level 3 | Common Equity/Interests/Warrants 4 | Enterprise market and discounted cash flow approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 42,484
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.100  
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   7.0
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.200  
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   12.8
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.150  
Level 3 | Common Equity/Interests/Warrants 4 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   11.8
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 16,966 $ 32,206
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.065 0.065
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Minimum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 5.5 5.3
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.105 0.103
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Maximum | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.083 0.083
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.073 0.073
Level 3 | Common Equity/Interests/Warrants 5 | Discounted cash flow | Weighted Average | Terminal Cap Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.061 0.060
Level 3 | Common Equity/Interests/Warrants 6 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 14,710 $ 26,817
Level 3 | Common Equity/Interests/Warrants 6 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 12.3 0.100
Level 3 | Common Equity/Interests/Warrants 6 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.160 0.300
Level 3 | Common Equity/Interests/Warrants 6 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.150 0.155
Level 3 | Common Equity/Interests/Warrants 6 | Market approach | Minimum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 5.8  
Level 3 | Common Equity/Interests/Warrants 6 | Market approach | Maximum | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 12.5  
Level 3 | Common Equity/Interests/Warrants 6 | Market approach | Weighted Average | EBITDA multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 6.8  
Level 3 | Common Equity/Interests/Warrants 7 | Valuation Approach, Enterprise Value Waterfall    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 22,289
Level 3 | Common Equity/Interests/Warrants 7 | Asset recovery analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,077  
Level 3 | Common Equity/Interests/Warrants 8 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 3,128  
Level 3 | Common Equity/Interests/Warrants 8 | Discounted cash flow | Minimum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.4  
Level 3 | Common Equity/Interests/Warrants 8 | Discounted cash flow | Maximum | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.0  
Level 3 | Common Equity/Interests/Warrants 8 | Discounted cash flow | Weighted Average | Revenue multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 3.0  
Level 3 | Common Equity/Interests/Warrants 8 | Valuation Approach, Enterprise Value Waterfall    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 11,880
Level 3 | Common Equity/Interests/Warrants 8 | Valuation Approach, Enterprise Value Waterfall | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.123
Level 3 | Common Equity/Interests/Warrants 8 | Valuation Approach, Enterprise Value Waterfall | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.160
Level 3 | Common Equity/Interests/Warrants 8 | Valuation Approach, Enterprise Value Waterfall | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.130
Level 3 | Common Equity/Interests/Warrants 9 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2  
Level 3 | Common Equity/Interests/Warrants 9 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.215  
Level 3 | Common Equity/Interests/Warrants 9 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.225  
Level 3 | Common Equity/Interests/Warrants 9 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input 0.215  
Level 3 | Common Equity/Interests/Warrants 9 | Asset recovery analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 11,660
Level 3 | Common Equity/Interests/Warrants 10 | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 4,614
Level 3 | Common Equity/Interests/Warrants 10 | Discounted cash flow | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.200
Level 3 | Common Equity/Interests/Warrants 10 | Discounted cash flow | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.300
Level 3 | Common Equity/Interests/Warrants 10 | Discounted cash flow | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input   0.205
[1] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.
[2] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.