Investments - Schedule of Investments of the Absolute Return Utility & Infrastructure Fund (Details) $ in Thousands |
Jun. 30, 2026
USD ($)
|
Dec. 31, 2025
USD ($)
|
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| Investment in securities, assets, cost | $ 362,856 | $ 282,230 |
| Investment in securities, assets, fair value | $ 400,422 | $ 292,719 |
| Investment in securities, assets, percentage of stockholders' equity | 0.5973 | 0.4761 |
| Investment in securities, liabilities, cost | $ (224,621) | $ (142,418) |
| Investment in securities, liabilities, fair value | $ (239,683) | $ (142,860) |
| Investment in securities, liabilities, percentage of stockholders' equity | (0.3575) | (0.2323) |