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v3.20.4

Business Realignment and Restructuring (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | $ 2,400 | $ 603 | $ 3,539
Additional restructuring costs | 200 |  |
Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 2,978 | 12,530 |
Particulate Matter Product Line Strategic Exit [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 3,428 |  |
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 3,428 |  |
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] | Minimum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Estimated total cost | 2,800 |  |
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] | Maximum [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Estimated total cost | 6,330 |  |
Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 2,978 | 12,530 |
Employee Termination [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 1,034 | (18) | 1,939
Employee Termination [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 1,119 | 8,088 |
Excess and Obsolete Inventory [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  |  | 823
Intangible Impairment [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  |  | 200
Fixed Asset Impairment [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  |  | 157
Other Restructuring [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 914 | 323 | 264
Other Restructuring [Member] | Particulate Matter Product Line Strategic Exit [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 102 |  |
Other Restructuring [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 1,859 | 4,442 |
Contract Termination [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 452 | 9 | 156
Selling, General and Administrative Expenses [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 1,774 |  |
Selling, General and Administrative Expenses [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 2,611 |  |
Selling, General and Administrative Expenses [Member] | Canton Facility Restructuring Plan [Member] | Canton Facility [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  | 1,526 |
Selling, General and Administrative Expenses [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 551 |  |
Cost of Goods Sold [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 147 |  |
Cost of Goods Sold [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 817 |  |
Cost of Goods Sold [Member] | Canton Facility Restructuring Plan [Member] | Canton Facility [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  | 7,625 |
Cost of Goods Sold [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 1,659 |  |
Cost of Goods Sold [Member] | Excess and Obsolete Inventory [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  |  | $ 823
Design and Development Expense [Member] | Electronics [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | 479 |  |
Design and Development Expense [Member] | Canton Facility Restructuring Plan [Member] | Canton Facility [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense |  | $ 3,379 |
Design and Development Expense [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expense | $ 768 |  |

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