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Business Realignment (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges |  | $ 171 | $ 1,902
Cost of Goods Sold [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges |  | 90 | 179
Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges |  | 81 | 664
Design and Development Expense [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges |  |  | 1,059
Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges | [1] |  | 1,180
Severance costs |  | 0 |
Electronics [Member] | Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 196
Electronics [Member] | Design and Development [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 984
PST Segment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total business realignment charges | [2] | 171 | 722
PST Segment [Member] | Cost of Goods Sold [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  | 90 | 179
PST Segment [Member] | Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  | $ 81 | 468
PST Segment [Member] | Design and Development [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | $ 75
[1] | There were no severance costs for the three months ended March 31, 2017. Severance costs for the three months ended March 31, 2016 related to Selling, General and Administration (“SG&A”) and Design and Development (“D&D”) were $196 and $984, respectively.
[2] | Severance costs for the three months ended March 31, 2017 related to cost of goods sold (“COGS”) and SG&A were $90 and $81, respectively. Severance costs for the three months ended March 31, 2016 related to COGS, SG&A and D&D were $179, $468 and $75, respectively.

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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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