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Derivatives (Narrative) (Details) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Sep. 01, 2022 | Mar. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) derivative | Dec. 31, 2020 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |
Net broker receivable |  |  | $ 1,500,000 | $ 3,400,000
Initial margin |  |  | 1,500,000 | $ 3,300,000
Variation margin |  | $ 100,000 | 0 |
Embedded derivative liability |  |  | $ 85,200,000 |
Natural Gas | Contracts not considered hedges under accounting guidance | Swaps |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Number of outstanding swap contracts | derivative |  |  | 0 |
Forecast | Class A Convertible Preferred Stock Units |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Period to notify holders | 30 days |  |  |
Stock reset rate percentage | 10.75% |  |  |
Percentage below issue price per share | 110.00% |  |  |
LIBOR | Forecast | Class A Convertible Preferred Stock Units |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Basis spread on variable rate over stock price | 0.0750 |  |  |

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