Fair-Value Measurements (Placement of Assets and Liabilities Within the Fair Value Hierarchy Levels) (Details) - Recurring Fair Value Measures - Commodity Derivatives - USD ($) $ in Thousands |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Level 1 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Assets Fair Value | $ 103 | $ 190 |
| Liabilities Fair Value | (164) | (819) |
| Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Assets Fair Value | 0 | 0 |
| Liabilities Fair Value | 0 | 0 |
| Level 3 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Assets Fair Value | 0 | 0 |
| Liabilities Fair Value | $ 0 | $ 0 |