Derivative Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of amount recognized as and released from accumulated other comprehensive income (loss)
Derivatives, Beginning Balance	$ 109	$ 1,199	$ 695
Foreign currency sales contracts cash flow hedges Recognized as comprehensive income (Loss)	102	(707)	1,344
Foreign currency sales contracts Accumulated Other Comprehensive Income (Loss)	107	(383)	(840)
Derivatives, Ending Balance	318	109	1,199
Foreign currency sales contracts [Member] \| Cash flow hedges [Member]
Summary of amount recognized as and released from accumulated other comprehensive income (loss)
Derivatives, Beginning Balance	114	281
Foreign currency sales contracts cash flow hedges Recognized as comprehensive income (Loss)	10	(24)
Foreign currency sales contracts Accumulated Other Comprehensive Income (Loss)	124	143
Derivatives, Ending Balance	0	114
Foreign currency sales contracts [Member] \| Fair value hedges [Member]
Summary of amount recognized as and released from accumulated other comprehensive income (loss)
Derivatives, Beginning Balance
Foreign currency sales contracts cash flow hedges Recognized as comprehensive income (Loss)
Foreign currency sales contracts Accumulated Other Comprehensive Income (Loss)
Derivatives, Ending Balance
Foreign currency purchases contracts [Member]
Summary of amount recognized as and released from accumulated other comprehensive income (loss)
Derivatives, Beginning Balance	309	329
Foreign currency sales contracts cash flow hedges Recognized as comprehensive income (Loss)	0	0
Foreign currency sales contracts Accumulated Other Comprehensive Income (Loss)	17	20
Derivatives, Ending Balance	292	309
Futures contracts - copper and aluminum [Member]
Summary of amount recognized as and released from accumulated other comprehensive income (loss)
Derivatives, Beginning Balance	(314)	589
Foreign currency sales contracts cash flow hedges Recognized as comprehensive income (Loss)	92	(684)
Foreign currency sales contracts Accumulated Other Comprehensive Income (Loss)	(248)	219
Derivatives, Ending Balance	$ 26	$ (314)

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References+ Details

Net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Reclassification Adjustments

-URI http://asc.fasb.org/extlink&oid=6522872

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+ Details

- Definition

Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

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+ Details