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Derivative Instruments (Tables) | 3 Months Ended
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Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] |
| Asset Derivatives |  | Liability Derivatives
| Location |  | Fair Value |  | Location |  | Fair Value
As of December 31, 2013 | (Dollars in Thousands)
Derivatives designated as cash flow hedges: |  |  |  |  |  |  |
Foreign currency derivatives | Other receivables |  | $ | 772 |  |  | Other payables |  | $ | 1,185 |
Commodity derivative contracts | Other current assets |  | 834 |  |  | Other current liabilities |  | — |
Total fair value |  |  | $ | 1,606 |  |  |  |  | $ | 1,185 |
As of March 31, 2014 |  |  |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |  |  |
Foreign currency derivatives | Other receivables |  | $ | 621 |  |  | Other payables |  | $ | 796 |
Commodity derivative contracts | Other current assets |  | 27 |  |  | Other current liabilities |  | — |
Total fair value |  |  | $ | 648 |  |  |  |  | $ | 796 |
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, 2013 | (Dollars in Thousands)
Derivatives not designated as hedges: |  |  |  |  |  |  |
Foreign currency derivatives | Other receivables |  | $ | 328 |  |  | Other payables |  | $ | 24 |
Total fair value |  |  | $ | 328 |  |  |  |  | $ | 24 |
As of March 31, 2014 |  |  |  |  |  |  |
Derivatives not designated as hedges: |  |  |  |  |  |  |
Foreign currency derivatives | Other receivables |  | $ | 254 |  |  | Other payables |  | $ | 221 |
Total fair value |  |  | $ | 254 |  |  |  |  | $ | 221 |
Schedule Of Realized (Gains) Losses On Derivatives Recognized In Statement Of Income |
|  |  |  | Amount of (Gain)/Loss Recognized (Effective Portion)
Three Months Ended March 31, |  | Location of (Gain)/Loss Reclassified from Other Comprehensive Income (Effective Portion) |  | 2013 |  | 2014
(Dollars in Thousands)
Derivatives designated as cash flow hedges: |  |  |  |  |  |
Foreign currency derivatives, excluding tax of ($9) and ($4), respectively |  | Cost of goods sold/Other expense / (income) / Revenue |  | $ | 94 |  |  | $ | 301 |
Commodity forward derivatives, excluding tax of $116 and ($190), respectively. |  | Cost of goods sold / Revenue |  | $ | (323 | ) |  | $ | 529 |
|  |  |  | Amount of (Gain)/Loss Recognized
Three Months Ended March 31, |  | Location of (Gain)/Loss Recognized in the Consolidated Statement of Operations |  | 2013 |  | 2014
(Dollars in thousands)
Derivatives not designated as hedges: |  |  |  |  |  |
Foreign currency derivatives |  | Cost of goods sold/Other expense (income) |  | $ | (1,782 | ) |  | $ | (191 | )

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- Definition Tabular disclosure for cash flow 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=7476318&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 + Details
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