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Income Taxes (Details 5) | 12 Months Ended
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Dec. 31, 2014
United States | Minimum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2012
United States | Maximum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2014
State of Wisconsin | Minimum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2009
State of Wisconsin | Maximum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2014
CHINA | Minimum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2007
CHINA | Maximum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2014
France | Minimum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2013
France | Maximum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2014
GERMANY | Minimum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2006
GERMANY | Maximum |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2014

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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