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Fair Value Measurements And Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location | At December 31, 2021 and 2020, the fair value of our derivatives and their respective balance sheet locations are presented in the following table:
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of December 31, 2021 | (Dollars in thousands)
Derivatives designated as cash flow hedges: |  |  |  |  |  |
Commodity derivative contracts | Prepaid and other current assets |  | $ | 8,469 |  |  | Other accrued liabilities |  | $ | — |
| Other assets |  | — |  |  | Other long-term obligations |  | — |
Interest rate swap contracts | Prepaid and other current assets |  | $ | — |  |  | Other accrued liabilities |  | $ | 140 |
| Other assets |  | 6,060 |  |  | Other long-term obligations |  | — |
Total fair value |  |  | $ | 14,529 |  |  |  |  | $ | 140 |
As of December 31, 2020 |  |  |  |  |  |  |
Commodity derivative contracts | Prepaid and other current assets |  | $ | 518 |  |  | Other accrued liabilities |  | $ | 888 |
| Other assets |  | 63 |  |  | Other long-term obligations |  | 1,898 |
Interest rate swap contracts | Prepaid and other current assets |  | $ | — |  |  | Other accrued liabilities |  | $ | 4,080 |
| Other assets |  | — |  |  | Other long-term obligations |  | 6,903 |
Total fair value |  |  | $ | 581 |  |  |  |  | $ | 13,769 |
Derivatives Not Designated as Hedging Instruments |
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of December 31, 2021 | (Dollars in Thousands)
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives | Prepaid and other current assets |  | $ | 388 |  |  | Other accrued liabilities |  | $ | 2 |
Total fair value |  |  | $ | 388 |  |  |  |  | $ | 2 |
As of December 31, 2020 |  |  |  |  |  |  |
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives | Prepaid and other current assets |  | $ | 6 |  |  | Other accrued liabilities |  | $ | 111 |
Interest rate swap contracts | Prepaid and other current assets |  | — |  |  | Other accrued liabilities |  | 952 |
Total fair value |  |  | $ | 6 |  |  |  |  | $ | 1,063 |
Schedule Of Realized (Gains) Losses On Derivatives Recognized In Statement Of Operations | The realized (gains) losses on derivatives are recognized in the Statements of Operations when the hedged item impacts earnings and are as follows for the years ended December 31, 2021, 2020 and 2019:
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of Realized (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | 2021 |  | 2020 |  | 2019
Derivatives designated as cash flow hedges: |  | (Dollars in thousands)
Commodity derivative contracts |  | Cost of sales |  | $ | 6,440 |  |  | $ | (4,134) |  |  | $ | (8,892) |
Interest rate swaps |  | Interest expense (income) |  | 1,846 |  |  | 4,390 |  |  | (1,050) |
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of Realized (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | 2021 |  | 2020 |  | 2019
Derivatives not designated as hedges: |  | (Dollars in thousands)
Foreign currency derivatives |  | Cost of sales, Other (income) expense, net |  | $ | 3,895 |  |  | $ | (2,671) |  |  | $ | (506) |
Commodity derivative contracts |  | Cost of sales |  | (1,399) |  |  | (530) |  |  | (223) |
Interest rate swap contracts |  | Interest expense |  | 866 |  |  | — |  |  | — |
Derivatives Not Designated as Hedging Instruments 2 | The amount of the amortization is as follows for 2021:
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of Realized (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | 2021 |  | 2020 |  | 2019
Derivatives not designated as hedges: |  | (Dollars in thousands)
Interest rate swap contracts |  | Interest expense |  | 2,807 |  |  | — |  |  | — |

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