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Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017
Defined Benefit Pension Plan [Member] | Domestic Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net service cost | $ 0 | $ 0 | $ 0 | $ 0
Interest cost | 371 | 411 | 1,113 | 1,232
Expected return on plan assets | 0 | 0 | 0 | 0
Amortization of prior service cost (credit) | 36 | 36 | 108 | 108
Amortization of losses (gains) | 159 | 82 | 477 | 247
Curtailments and settlements | 0 | 0 | 0 | 0
Net periodic benefit cost | 566 | 529 | 1,698 | 1,587
Defined Benefit Pension Plan [Member] | Foreign Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net service cost | 900 | 948 | 2,775 | 2,776
Interest cost | 1,175 | 1,247 | 3,628 | 3,613
Expected return on plan assets | (463) | (519) | (1,430) | (1,543)
Amortization of prior service cost (credit) | 52 | 19 | 161 | 55
Amortization of losses (gains) | 1,520 | 1,595 | 4,690 | 4,596
Curtailments and settlements | 441 | 331 | 1,358 | 983
Net periodic benefit cost | 3,625 | 3,621 | 11,182 | 10,480
Other Postretirement Benefits [Member] | Domestic Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net service cost | 35 | 33 | 103 | 99
Interest cost | 69 | 77 | 205 | 232
Amortization of prior service cost (credit) | (37) | (209) | (111) | (627)
Amortization of losses (gains) | (10) | (24) | (29) | (70)
Net periodic benefit cost | 57 | (123) | 168 | (366)
Other Postretirement Benefits [Member] | Foreign Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net service cost | 71 | 71 | 219 | 202
Interest cost | 28 | 26 | 86 | 76
Amortization of prior service cost (credit) | 0 | 0 | 0 | 0
Amortization of losses (gains) | 26 | 16 | 80 | 45
Net periodic benefit cost | $ 125 | $ 113 | $ 385 | $ 323

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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