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Defined Benefit Pension Plans (Tables) | 3 Months Ended
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Mar. 30, 2018
Defined Benefit Plan [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] | The Company has defined benefit plans covering employees of its Switzerland and Japan operations. The following table summarizes the components of net periodic pension cost recorded for the Company’s defined benefit pension plans (in thousands):
|  | Three Months Ended |
|  | March 30, 2018 |  | March 31, 2017 |
Service cost(1) |  | $ | 138 |  | $ | 129 |
Interest cost(2) |  |  | 14 |  |  | 14 |
Expected return on plan assets(2) |  |  | (26) |  |  | (23) |
Net amortization of transitional obligation(2),(3) |  |  | 3 |  |  | 3 |
Prior service credit(2),(3) |  |  | (6) |  |  | (2) |
Actuarial loss recognized in current period(2),(3) |  |  | 28 |  |  | 17 |
Net periodic pension cost |  | $ | 151 |  | $ | 138 |
(1) Recognized in selling general and administrative expenses on the Condensed Consolidated Statements of Operations. (2) Recognized in other income, net on the Condensed Consolidated Statements of Operations. (3) Amounts reclassified from accumulated other comprehensive loss.

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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