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Fair Value Measurements And Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Fair Value Disclosures [Abstract] |
Schedule Of Fair Value Of Derivatives Designated As Fair Value Hedges |
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of December 31, 2018 | (Dollars in Thousands)
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives | Prepaid and other current assets |  | $ | — |  |  | Other current liabilities |  | $ | 43 |
As of December 31, 2017 |  |  |  |  |  |  |
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives | Prepaid and other current assets |  | $ | 9 |  |  | Other current liabilities |  | $ | 90 |
Schedule Of Realized (Gains) Losses On Derivatives Recognized In Statement Of Operations |
|  |  |  | Amount of (Gain)/Loss Recognized
|  | Location of (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | 2018 |  | 2017 |  | 2016
Derivatives designated as cash flow hedges: |  | (Dollars in thousands) |  |
Commodity forward derivatives |  | Cost of sales |  | $ | (919 | ) |  | $ | — |  |  | $ | — |

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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=109980867&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure for fair value 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 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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