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Business Realignment and Restructuring (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | $ 355 | $ (13) | $ 1,517 | $ 729
Cost of Goods Sold [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | (27) | 16 |  | 42
Selling, General and Administrative Expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | 392 | (29) | 1,517 | 559
Design and Development Expense [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | (10) |  |  | 128
Control Devices [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | (37) | 32 | 512 | 160
Control Devices [Member] | Cost of Goods Sold [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs | (27) |  |  |
Control Devices [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs |  | 32 | 512 | 32
Control Devices [Member] | Design and Development [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs |  |  |  | 128
Control Devices [Member] | Design and Development Expense [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs | (10) |  |  |
Electronics [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges |  | (80) |  | 215
Electronics [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs |  | (80) |  | 215
PST Segment [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges |  | 35 |  | 354
PST Segment [Member] | Cost of Goods Sold [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs |  | 16 |  | 42
PST Segment [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs |  | $ 19 |  | $ 312
Unallocated Corporate [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total business realignment charges | 392 |  | 1,005 |
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance costs | $ 392 |  | $ 1,005 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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