CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Schedule of Investment (Details) - USD ($)
$ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
| Schedule Of Investments [Line Items] |
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| Investment owned, percent of net assets |
208.45%
|
[1] |
0.00%
|
[2] |
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| Investment cost |
$ 4,865,670
|
[3] |
$ 4,467,968
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|
|
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| Investments, at fair value: |
$ 4,845,903
|
|
4,466,647
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| Control and affiliated investments |
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| Schedule Of Investments [Line Items] |
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| Investment owned, percent of net assets |
5.38%
|
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|
|
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| Investment cost |
$ 125,343
|
|
|
|
|
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| Investments, at fair value: |
$ 125,066
|
|
$ 115,051
|
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| Control investments |
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| Schedule Of Investments [Line Items] |
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| Investment owned, percent of net assets |
5.25%
|
|
5.19%
|
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|
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| Investment cost |
$ 114,659
|
|
$ 105,409
|
|
|
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| Investments, at fair value: |
$ 122,030
|
|
$ 115,051
|
|
$ 112,323
|
$ 113,179
|
| Control investments | Majority Owned Control Investments |
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| Schedule Of Investments [Line Items] |
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| Investment owned, percent of net assets |
4.83%
|
|
4.77%
|
|
|
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| Investment cost |
$ 92,246
|
|
$ 82,996
|
|
|
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| Investments, at fair value: |
$ 112,258
|
|
$ 105,710
|
|
104,047
|
101,522
|
| Control investments | Other Control Investments |
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| Schedule Of Investments [Line Items] |
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| Investment owned, percent of net assets |
0.42%
|
|
0.42%
|
|
|
|
| Investment cost |
$ 22,413
|
|
$ 22,413
|
|
|
|
| Investments, at fair value: |
9,772
|
|
9,341
|
|
8,276
|
11,657
|
| Control investments | Coronado Aesthetics, LLC |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
180
|
|
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|
344
|
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| Control investments | Coronado Aesthetics, LLC | Majority Owned Control Investments | Preferred Stock |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
180
|
|
218
|
|
343
|
69
|
| Control investments | Coronado Aesthetics, LLC | Majority Owned Control Investments | Common Stock |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
0
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|
0
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|
1
|
0
|
| Control investments | Coronado Aesthetics, LLC | Medical Devices & Equipment | Majority Owned Control Investments |
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| Schedule Of Investments [Line Items] |
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| Investment cost |
250
|
|
250
|
|
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| Investments, at fair value: |
$ 180
|
|
$ 218
|
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| Control investments | Coronado Aesthetics, LLC | Medical Devices & Equipment | Majority Owned Control Investments | Common Stock |
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| Schedule Of Investments [Line Items] |
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| Shares (in shares) |
180,000
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|
180,000
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| Investment cost |
$ 0
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|
$ 0
|
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| Investments, at fair value: |
$ 0
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|
$ 0
|
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| Control investments | Coronado Aesthetics, LLC | Medical Devices & Equipment | Preferred Series A | Majority Owned Control Investments | Preferred Stock |
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| Schedule Of Investments [Line Items] |
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| Shares (in shares) |
5,000,000
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|
5,000,000
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| Investment cost |
$ 250
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|
$ 250
|
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| Investments, at fair value: |
180
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|
218
|
|
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|
| Control investments | Gibraltar Business Capital, LLC |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
62,136
|
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|
60,193
|
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| Control investments | Gibraltar Business Capital, LLC | Majority Owned Control Investments | Unsecured Debt |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
38,357
|
|
38,255
|
|
38,006
|
36,212
|
| Control investments | Gibraltar Business Capital, LLC | Majority Owned Control Investments | Member Units |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
23,779
|
|
23,963
|
|
22,187
|
23,051
|
| Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments |
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| Schedule Of Investments [Line Items] |
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| Investment cost |
69,813
|
|
70,711
|
|
|
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| Investments, at fair value: |
$ 62,136
|
|
$ 62,218
|
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| Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt One |
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| Schedule Of Investments [Line Items] |
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| Maturity Date |
2029-07
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|
2029-07
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| Interest rate, fixed |
11.50%
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|
3.45%
|
|
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| Investment, interest rate, paid in kind |
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|
8.05%
|
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| Principal amount |
$ 28,805
|
|
$ 28,805
|
|
|
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| Investment cost |
28,486
|
|
28,412
|
|
|
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| Investments, at fair value: |
$ 28,486
|
|
$ 28,412
|
|
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| Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt Two |
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| Schedule Of Investments [Line Items] |
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| Maturity Date |
2029-07
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|
2029-07
|
|
|
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| Interest rate, fixed |
11.95%
|
|
11.95%
|
|
|
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| Principal amount |
$ 10,000
|
|
$ 10,000
|
|
|
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| Investment cost |
9,871
|
|
9,843
|
|
|
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| Investments, at fair value: |
$ 9,871
|
|
$ 9,843
|
|
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| Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Member Units |
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| Schedule Of Investments [Line Items] |
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| Shares (in shares) |
1
|
|
1
|
|
|
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| Investment cost |
$ 31,456
|
|
$ 32,456
|
|
|
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| Investments, at fair value: |
23,779
|
|
23,963
|
|
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| Control investments | Hercules Adviser LLC |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
49,942
|
|
|
|
43,510
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| Control investments | Hercules Adviser LLC | Majority Owned Control Investments | Unsecured Debt |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
8,000
|
|
0
|
|
0
|
12,000
|
| Control investments | Hercules Adviser LLC | Majority Owned Control Investments | Member Units |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
41,942
|
|
43,274
|
|
43,510
|
30,190
|
| Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments |
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| Schedule Of Investments [Line Items] |
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|
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|
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| Investment cost |
22,183
|
|
12,035
|
|
|
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| Investments, at fair value: |
$ 49,942
|
|
$ 43,274
|
|
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| Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt |
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| Schedule Of Investments [Line Items] |
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| Maturity Date |
2027-03
|
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|
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| Interest rate, fixed |
6.75%
|
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| Principal amount |
$ 8,000
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|
|
|
|
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| Investment cost |
8,000
|
|
|
|
|
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| Investments, at fair value: |
$ 8,000
|
|
|
|
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| Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments | Member Units |
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| Schedule Of Investments [Line Items] |
|
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|
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| Shares (in shares) |
1
|
|
1
|
|
|
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| Investment cost |
$ 14,183
|
|
$ 12,035
|
|
|
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| Investments, at fair value: |
41,942
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|
43,274
|
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| Control investments | Tectura Corporation |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
9,772
|
|
|
|
8,276
|
|
| Control investments | Tectura Corporation | Other Control Investments | Preferred Stock |
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|
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| Schedule Of Investments [Line Items] |
|
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| Investments, at fair value: |
1,522
|
|
1,250
|
|
209
|
3,623
|
| Control investments | Tectura Corporation | Other Control Investments | Common Stock |
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| Schedule Of Investments [Line Items] |
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| Investments, at fair value: |
0
|
|
0
|
|
0
|
7
|
| Control investments | Tectura Corporation | Other Control Investments | Senior Secured Debt |
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|
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| Schedule Of Investments [Line Items] |
|
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| Investments, at fair value: |
8,250
|
|
8,091
|
|
$ 8,067
|
$ 8,027
|
| Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments |
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
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| Investment cost |
22,413
|
|
22,413
|
|
|
|
| Investments, at fair value: |
$ 9,772
|
|
$ 9,341
|
|
|
|
| Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments | Common Stock |
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
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| Shares (in shares) |
414,994,863
|
|
414,994,863
|
|
|
|
| Investment cost |
$ 900
|
|
$ 900
|
|
|
|
| Investments, at fair value: |
$ 0
|
|
$ 0
|
|
|
|
| Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments | Senior Secured Debt |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Maturity Date |
2027-01
|
|
2027-01
|
|
|
|
| Interest rate, fixed |
8.25%
|
|
8.25%
|
|
|
|
| Principal amount |
$ 8,250
|
|
$ 8,250
|
|
|
|
| Investment cost |
8,250
|
|
8,250
|
|
|
|
| Investments, at fair value: |
$ 8,250
|
|
$ 8,091
|
|
|
|
| Control investments | Tectura Corporation | Consumer & Business Services | Preferred Series BB | Other Control Investments | Preferred Stock |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Shares (in shares) |
1,000,000
|
|
1,000,000
|
|
|
|
| Investment cost |
$ 0
|
|
$ 0
|
|
|
|
| Investments, at fair value: |
$ 0
|
|
$ 0
|
|
|
|
| Control investments | Tectura Corporation | Consumer & Business Services | Series C Preferred Stock | Other Control Investments | Preferred Stock |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Shares (in shares) |
3,235,298
|
|
3,235,298
|
|
|
|
| Investment cost |
$ 13,263
|
|
$ 13,263
|
|
|
|
| Investments, at fair value: |
$ 1,522
|
|
1,250
|
|
|
|
| Affiliate Investments |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Investment owned, percent of net assets |
0.13%
|
|
|
|
|
|
| Investment cost |
$ 10,684
|
|
0
|
|
|
|
| Investments, at fair value: |
3,036
|
|
0
|
|
|
|
| Affiliate Investments | Annex Cloud |
|
|
|
|
|
|
| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Investments, at fair value: |
3,036
|
|
|
|
|
|
| Affiliate Investments | Annex Cloud | Common Stock |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Investments, at fair value: |
0
|
|
0
|
|
|
|
| Affiliate Investments | Annex Cloud | Senior Secured Debt |
|
|
|
|
|
|
| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Investments, at fair value: |
$ 3,036
|
|
$ 0
|
|
|
|
| Affiliate Investments | Annex Cloud | Application Software | Common Stock |
|
|
|
|
|
|
| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Shares (in shares) |
175,211
|
|
|
|
|
|
| Investment cost |
$ 7,359
|
|
|
|
|
|
| Investments, at fair value: |
$ 0
|
|
|
|
|
|
| Affiliate Investments | Annex Cloud | Application Software | Senior Secured Debt |
|
|
|
|
|
|
| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Maturity Date |
2026-09
|
|
|
|
|
|
| Investment, interest rate, paid in kind |
9.99%
|
|
|
|
|
|
| Investment, interest rate, floor |
10.99%
|
|
|
|
|
|
| Principal amount |
$ 3,325
|
|
|
|
|
|
| Investment cost |
3,325
|
|
|
|
|
|
| Investments, at fair value: |
$ 3,036
|
|
|
|
|
|
| Affiliate Investments | Annex Cloud | Application Software | Warrant - Common Units |
|
|
|
|
|
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| Schedule Of Investments [Line Items] |
|
|
|
|
|
|
| Shares (in shares) |
185,185
|
|
|
|
|
|
| Investment cost |
$ 0
|
|
|
|
|
|
| Investments, at fair value: |
$ 0
|
|
|
|
|
|
|
|