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Derivatives (Narrative) (Details) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 01, 2022 | Sep. 01, 2017 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 29, 2022 | Mar. 01, 2019
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Net broker receivables |  |  | $ 4.0 | $ 2.9 |  |
Margin deposit assets |  |  | 3.8 | 2.1 |  |
Increase in variation margin deposits outstanding |  |  | $ 0.2 | $ 0.8 |  |
Class A Convertible Preferred Units |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Threshold trading days to notify holders | 30 days | 30 days |  |  |  |
Basis spread |  |  |  |  |  | 0.0200
Reset rate | 10.75% |  | 11.24% |  | 11.24% |
Percentage below issue price | 110.00% |  |  |  |  |
Class A Convertible Preferred Units | LIBOR |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Basis spread | 0.0750 |  |  |  | 750 |
Reset rate |  |  |  |  | 3.74% |

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