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Accumulated Other Comprehensive Loss (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 | Apr. 01, 2012
Subtotal pre-tax | $ 1,164 | $ 932
Income tax expense | (457) | (367)
Total after tax effect | 707 | 565
Net Pension Activity [Member] |  |
Subtotal pre-tax | 842 | 698
Income tax expense | (330) | (275)
Total after tax effect | 512 | 423
Net Postretirement Benefits Activity [Member] |  |
Subtotal pre-tax | 322 | 234
Income tax expense | (127) | (92)
Total after tax effect | 195 | 142
Cost of sales [Member] |  |
Subtotal pre-tax | 115 | 105
Cost of sales [Member] | Net Pension Activity [Member] |  |
Subtotal pre-tax | 76 | 77
Cost of sales [Member] | Net Postretirement Benefits Activity [Member] |  |
Subtotal pre-tax | 39 | 28
S,D&A expenses [Member] |  |
Subtotal pre-tax | 1,049 | 827
S,D&A expenses [Member] | Net Pension Activity [Member] |  |
Subtotal pre-tax | 766 | 621
S,D&A expenses [Member] | Net Postretirement Benefits Activity [Member] |  |
Subtotal pre-tax | $ 283 | $ 206

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- Definition Tax effect of the income statement impact of the reclassification adjustment for actuarial gain (loss) recognized as a component of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e640-108580 + Details
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- Definition Before tax amount of the income statement impact of the reclassification adjustment for actuarial gain (loss) recognized as a component of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e689-108580 + Details
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- Definition Net of tax amount of the income statement impact of the reclassification adjustment for actuarial (gains) losses recognized as a component of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e689-108580 + Details
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