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Derivative Instruments (Tables) | 9 Months Ended
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Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The fair value of all derivatives is recorded as assets or liabilities on a gross basis in our Condensed Consolidated Balance Sheets. As of September 30, 2021 and December 31, 2020, the fair value of our derivatives and their respective balance sheet locations are presented in the following tables:
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of September 30, 2021 | (Dollars in thousands)
Derivatives designated as cash flow hedges: |  |  |  |  |  |
Commodity derivative contracts | Prepaid and other current assets |  | $ | 12,322 |  |  | Other accrued liabilities |  | $ | — |
| Other long-term assets |  | — |  |  | Other long-term obligations |  | — |
Interest rate swap contracts | Prepaid and other current assets |  | — |  |  | Other accrued liabilities |  | 848 |
| Other long-term assets |  | 2,510 |  |  | Other long-term obligations |  | — |
Total fair value |  |  | $ | 14,832 |  |  |  |  | $ | 848 |
As of December 31, 2020 |
Derivatives designated as cash flow hedges: |  |  |  |  |  |
Commodity derivative contracts | Prepaid and other current assets |  | $ | 518 |  |  | Other accrued liabilities |  | $ | 888 |
| Other long-term assets |  | 63 |  |  | Other long-term obligations |  | 1,898 |
Interest rate swap contracts | Prepaid and other current assets |  | — |  |  | Other accrued liabilities |  | 4,080 |
| Other long-term assets |  | — |  |  | Other long-term obligations |  | 6,903 |
Total fair value |  |  | $ | 581 |  |  |  |  | $ | 13,769 |
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of September 30, 2021 | (Dollars in thousands)
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives | Prepaid and other current assets |  | $ | 43 |  |  | Other accrued liabilities |  | $ | 1,077 |
Commodity derivative contracts | Prepaid and other current assets |  | $ | 724 |  |  | Other accrued liabilities |  | $ | — |
Total fair value |  |  | $ | 767 |  |  |  |  | $ | 1,077 |
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 Derivatives Instruments Statements of Financial Performance and Financial Position, Location | The location and amount of realized (gains) losses on derivatives are recognized in the Statements of Operations as follows for the periods ended September 30, 2021 and 2020:
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of Realized (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | For the Three Months Ended September 30,
|  |  | 2021 |  | 2020
Derivatives designated as cash flow hedges: |  |  |  | (Dollars in thousands)
Commodity derivative contracts |  | Cost of sales |  | $ | 1,191 |  |  | $ | (1,295) |
Interest rate swap contracts |  | Interest expense |  | 285 |  |  | 1,537 |
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives |  | Cost of sales, Other expense (income) |  | $ | 448 |  |  | $ | (243) |
Commodity derivative contracts |  | Cost of sales |  | (440) |  |  | (207) |
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | For the Nine Months Ended September 30,
|  |  | 2021 |  | 2020
Derivatives designated as cash flow hedges: |  |  |  | (Dollars in thousands)
Commodity contract hedges |  | Cost of sales |  | $ | 6,238 |  |  | $ | (5,234) |
Interest rate swap contracts |  | Interest expense |  | 1,571 |  |  | 2,852 |
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives |  | Cost of sales, Other expense (income) |  | $ | 2,342 |  |  | $ | (959) |
Commodity derivative contracts |  | Cost of sales |  | (682) |  |  | (321) |
Interest rate swap contracts |  | Interest expense |  | 866 |  |  | — |

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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- Definition Tabular disclosure of derivative instruments (including nonderivative instruments that are designated and qualify as hedging instruments) of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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