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Fair Value Measurements (Narrative) (Details) - Senior Notes [Member] - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt, long-term and short-term, combined carrying value | $ 89.6 | $ 95.7
Long-term debt, fair value | 73.8 | 71.7
Long-term debt, face amount | $ 74.3 | $ 74.3
Debt Instrument, Interest Rate, Stated Percentage | 8.25% |

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