Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Summary of schedule of investment (Details)

v3.23.3
CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Summary of schedule of investment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating $ 116,744 $ 84,229 $ 338,065 $ 221,501  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     2,963,955    
Net Change in Unrealized Appreciation (Depreciation) (46,240) (2,089) (6,277) (87,147)  
Investments, fair value, ending balance 3,261,391   3,261,391   $ 2,963,955
Investment cost 3,308,894   3,308,894   3,005,696
Investments, at fair value: 3,261,391   3,261,391   2,963,955
Control investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     3,330 3,490  
Realized Gain (Loss) 0 0 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     76,458 73,504 73,504
Gross Additions     14,372 3,210  
Net Change in Unrealized Appreciation (Depreciation) (1,099) (2,571) 12,320 3,611  
Investments, fair value, ending balance $ 103,150 80,325 $ 103,150 80,325 $ 76,458
Investment owned, percent of net assets 6.24%   6.24%   5.46%
Investment cost $ 101,643   $ 101,643   $ 87,271
Investments, at fair value: 103,150 80,325 103,150 80,325 76,458
Control investments | Majority Owned Control Investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     2,814 2,974  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     68,416 65,235 65,235
Gross Additions     14,372 3,210  
Net Change in Unrealized Appreciation (Depreciation)     14,119 3,562  
Investments, fair value, ending balance $ 96,907 72,007 $ 96,907 72,007 $ 68,416
Investment owned, percent of net assets 5.87%   5.87%   4.88%
Investment cost $ 79,230   $ 79,230   $ 64,858
Investments, at fair value: 96,907 72,007 96,907 72,007 68,416
Control investments | Other Control Investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     516 516  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     8,042 8,269 8,269
Net Change in Unrealized Appreciation (Depreciation)     (1,799) 49  
Investments, fair value, ending balance $ 6,243 8,318 $ 6,243 8,318 $ 8,042
Investment owned, percent of net assets 0.37%   0.37%   0.58%
Investment cost $ 22,413   $ 22,413   $ 22,413
Investments, at fair value: 6,243 8,318 6,243 8,318 8,042
Control investments | Hercules Adviser LLC          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss) 0 0 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation) 1,507 (1,236) 9,515 9,955  
Investments, fair value, ending balance 40,668 33,945 40,668 33,945  
Investments, at fair value: 40,668 33,945 40,668 33,945  
Control investments | Hercules Adviser LLC | Member Units | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     19,153 11,990 11,990
Net Change in Unrealized Appreciation (Depreciation)     9,515 9,955  
Investments, fair value, ending balance 28,668 21,945 28,668 21,945 19,153
Investments, at fair value: 28,668 21,945 28,668 21,945 19,153
Control investments | Coronado Aesthetics, LLC          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss) 0 0 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation) (50) (22) (72) (165)  
Investments, fair value, ending balance 247 400 247 400  
Investments, at fair value: 247 400 247 400  
Control investments | Coronado Aesthetics, LLC | Common Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     6 65 65
Net Change in Unrealized Appreciation (Depreciation)     (4) (56)  
Investments, fair value, ending balance 2 9 2 9 6
Investments, at fair value: 2 9 2 9 6
Control investments | Coronado Aesthetics, LLC | Preferred Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     313 500 500
Net Change in Unrealized Appreciation (Depreciation)     (68) (109)  
Investments, fair value, ending balance 245 391 245 391 313
Investments, at fair value: 245 391 245 391 313
Control investments | Tectura Corporation          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss) 0 0 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation) (830) 110 (1,799) 49  
Investments, fair value, ending balance 6,243 8,318 6,243 8,318  
Investments, at fair value: 6,243 8,318 6,243 8,318  
Control investments | Gibraltar Business Capital, LLC          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss) 0 0 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation) (1,726) (1,423) 4,676 (6,228)  
Investments, fair value, ending balance 55,992 37,662 55,992 37,662  
Investments, at fair value: 55,992 37,662 55,992 37,662  
Control investments | Gibraltar Business Capital, LLC | Common Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       1,225 1,225
Net Change in Unrealized Appreciation (Depreciation)       (91)  
Investments, fair value, ending balance   1,134   1,134  
Investments, at fair value:   1,134   1,134  
Control investments | Gibraltar Business Capital, LLC | Preferred Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       19,393 19,393
Net Change in Unrealized Appreciation (Depreciation)       (4,904)  
Investments, fair value, ending balance   14,489   14,489  
Investments, at fair value:   14,489   14,489  
Control investments | Gibraltar Business Capital, LLC | Member Units | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     15,244    
Gross Additions     4,500    
Net Change in Unrealized Appreciation (Depreciation)     1,809    
Investments, fair value, ending balance 21,553   21,553   15,244
Investments, at fair value: 21,553   21,553   15,244
Control investments | Medical Devices & Equipment | Coronado Aesthetics, LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     319    
Investments, fair value, ending balance 247   247   319
Investment cost 250   250   250
Investments, at fair value: 247   247   319
Control investments | Medical Devices & Equipment | Coronado Aesthetics, LLC | Common Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     6    
Investments, fair value, ending balance $ 2   $ 2   $ 6
Shares 180,000   180,000   180,000
Investment cost $ 0   $ 0   $ 0
Investments, at fair value: 2   2   6
Control investments | Medical Devices & Equipment | Coronado Aesthetics, LLC | Preferred Stock | Preferred Series A | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     313    
Investments, fair value, ending balance $ 245   $ 245   $ 313
Shares 5,000,000   5,000,000   5,000,000
Investment cost $ 250   $ 250   $ 250
Investments, at fair value: 245   245   313
Control investments | Diversified Financial Services | Hercules Adviser LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     31,153    
Investments, fair value, ending balance 40,668   40,668   31,153
Investment cost 12,035   12,035   12,035
Investments, at fair value: 40,668   40,668   31,153
Control investments | Diversified Financial Services | Hercules Adviser LLC | Member Units | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     19,153    
Investments, fair value, ending balance $ 28,668   $ 28,668   $ 19,153
Shares 1   1   1
Investment cost $ 35   $ 35   $ 35
Investments, at fair value: 28,668   28,668   19,153
Control investments | Diversified Financial Services | Gibraltar Business Capital, LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     36,944    
Investments, fair value, ending balance 55,992   55,992   36,944
Investment cost 66,945   66,945   52,573
Investments, at fair value: 55,992   55,992   36,944
Control investments | Diversified Financial Services | Gibraltar Business Capital, LLC | Common Stock | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     1,107    
Investments, fair value, ending balance         $ 1,107
Shares         830,000
Investment cost         $ 1,884
Investments, at fair value:         1,107
Control investments | Diversified Financial Services | Gibraltar Business Capital, LLC | Preferred Stock | Preferred Series A | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     14,137    
Investments, fair value, ending balance         $ 14,137
Shares         10,602,752
Investment cost         $ 26,122
Investments, at fair value:         14,137
Control investments | Diversified Financial Services | Gibraltar Business Capital, LLC | Member Units | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, ending balance $ 21,553   $ 21,553    
Shares 1   1    
Investment cost $ 32,506   $ 32,506    
Investments, at fair value: 21,553   21,553    
Control investments | Consumer & Business Services | Tectura Corporation | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     8,042    
Investments, fair value, ending balance 6,243   6,243   8,042
Investment cost 22,413   22,413   22,413
Investments, at fair value: 6,243   6,243   8,042
Control investments | Consumer & Business Services | Tectura Corporation | Common Stock | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     0    
Investments, fair value, ending balance $ 0   $ 0   $ 0
Shares 414,994,863   414,994,863   414,994,863
Investment cost $ 900   $ 900   $ 900
Investments, at fair value: 0   0   0
Control investments | Consumer & Business Services | Tectura Corporation | Preferred Stock | Preferred Series BB | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     0    
Investments, fair value, ending balance $ 0   $ 0   $ 0
Shares 1,000,000   1,000,000   1,000,000
Investment cost $ 0   $ 0   $ 0
Investments, at fair value: 0   0   0
Control investments | Senior Secured Debt | Tectura Corporation | Other Control Investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     516 516  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     8,042 8,269 8,269
Net Change in Unrealized Appreciation (Depreciation)     (1,799) 49  
Investments, fair value, ending balance 6,243 8,318 6,243 8,318 8,042
Investments, at fair value: 6,243 8,318 6,243 8,318 8,042
Control investments | Senior Secured Debt | Consumer & Business Services | Tectura Corporation | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     0    
Investments, fair value, ending balance $ 0   $ 0   $ 0
Maturity Date     2024-07   2024-07
Investment, interest rate, paid in kind 5.00%   5.00%   5.00%
Principal amount $ 23,703   $ 23,703   $ 10,680
Investment cost 13,263   13,263   240
Investments, at fair value: 0   0   0
Control investments | Unsecured Debt | Hercules Adviser LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     455 393  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     12,000 8,850 8,850
Gross Additions       3,150  
Net Change in Unrealized Appreciation (Depreciation)       0  
Investments, fair value, ending balance 12,000 12,000 12,000 12,000 12,000
Investments, at fair value: 12,000 12,000 12,000 12,000 12,000
Control investments | Unsecured Debt | Gibraltar Business Capital, LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating     2,359 2,581  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     21,700 23,212 23,212
Gross Additions     9,872 60  
Net Change in Unrealized Appreciation (Depreciation)     2,867 (1,233)  
Investments, fair value, ending balance 34,439 22,039 34,439 22,039 21,700
Investments, at fair value: 34,439 22,039 34,439 22,039 21,700
Control investments | Unsecured Debt | Diversified Financial Services | Hercules Adviser LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     12,000    
Investments, fair value, ending balance $ 12,000   $ 12,000   $ 12,000
Maturity Date     2025-06   2025-06
Investment, interest rate, paid in cash 5.00%   5.00%   5.00%
Principal amount $ 12,000   $ 12,000   $ 12,000
Investment cost 12,000   12,000   12,000
Investments, at fair value: 12,000   12,000   12,000
Control investments | Unsecured Debt One | Diversified Financial Services | Gibraltar Business Capital, LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     12,802    
Investments, fair value, ending balance $ 24,638   $ 24,638   $ 12,802
Maturity Date     2026-09   2026-09
Investment, interest rate, paid in cash 11.50%   11.50%   14.50%
Principal amount $ 25,000   $ 25,000   $ 15,000
Investment cost 24,638   24,638   14,715
Investments, at fair value: 24,638   24,638   12,802
Control investments | Unsecured Debt Two | Diversified Financial Services | Gibraltar Business Capital, LLC | Majority Owned Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     8,898    
Investments, fair value, ending balance $ 9,801   $ 9,801   $ 8,898
Maturity Date     2026-09   2026-09
Investment, interest rate, paid in cash 11.95%   11.95%   11.50%
Principal amount $ 10,000   $ 10,000   $ 10,000
Investment cost 9,801   9,801   9,852
Investments, at fair value: 9,801   9,801   8,898
Control investments | Senior Secured Debt One | Consumer & Business Services | Tectura Corporation | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     8,042    
Investments, fair value, ending balance $ 6,243   $ 6,243   $ 8,042
Maturity Date     2024-07   2024-07
Investment, interest rate, paid in cash 8.25%   8.25%   8.25%
Principal amount $ 8,250   $ 8,250   $ 8,250
Investment cost 8,250   8,250   8,250
Investments, at fair value: 6,243   6,243   8,042
Control investments | Senior Secured Debt Two | Consumer & Business Services | Tectura Corporation | Other Control Investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance     0    
Investments, fair value, ending balance         $ 0
Maturity Date         2024-07
Investment, interest rate, paid in kind         5.00%
Principal amount         $ 13,023
Investment cost         13,023
Investments, at fair value:         0
Affiliate investments          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss) 0 (2,014) 0 1,758  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation) $ 0 4,631 $ 0 4,089  
Affiliate investments | Pineapple Energy LLC          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss)   (2,014)   (2,014)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation)   4,631   4,209  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Affiliate investments | Black Crow AI, Inc. affiliates          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss)   0   3,772  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Net Change in Unrealized Appreciation (Depreciation)   0   (120)  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Investment, Affiliated Issuer, Noncontrolled          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating       1,204  
Realized Gain (Loss)       1,758  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       9,458 9,458
Gross reductions       (13,547)  
Net Change in Unrealized Appreciation (Depreciation)       4,089  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Investment, Affiliated Issuer, Noncontrolled | Pineapple Energy LLC | Common Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       591 591
Gross reductions       (4,767)  
Net Change in Unrealized Appreciation (Depreciation)       4,176  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Investment, Affiliated Issuer, Noncontrolled | Black Crow AI, Inc. affiliates | Preferred Stock          
Investments in and Advances to Affiliates [Line Items]          
Realized Gain (Loss)       3,772  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       1,120 1,120
Gross reductions       (1,000)  
Net Change in Unrealized Appreciation (Depreciation)       (120)  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Investment, Affiliated Issuer, Noncontrolled | Senior Secured Debt | Pineapple Energy LLC          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating       1,204  
Realized Gain (Loss)       (2,014)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       7,747 7,747
Gross reductions       (7,780)  
Net Change in Unrealized Appreciation (Depreciation)       33  
Investments, fair value, ending balance   0   0  
Investments, at fair value:   0   0  
Investment, Affiliated Issuer And Controlled Issuer          
Investments in and Advances to Affiliates [Line Items]          
Gross Investment Income, Operating       4,694  
Realized Gain (Loss)       1,758  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Investments, fair value, beginning balance       82,962 $ 82,962
Gross Additions       3,210  
Gross reductions       (13,547)  
Net Change in Unrealized Appreciation (Depreciation)       7,700  
Investments, fair value, ending balance   80,325   80,325  
Investments, at fair value:   $ 80,325   $ 80,325