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v3.21.2

Business Realignment and Restructuring (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020
Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | $ 36 | $ 567 |  | $ 256 | $ 2,195
Particulate Matter Product Line Strategic Exit [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  | 2,329 | 2,894
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | 675 | 342 |  | 2,329 | 2,894
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] | Minimum [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Estimated total cost | 1,400 |  |  | 1,400 |
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] | Maximum [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Estimated total cost | 4,200 |  |  | 4,200 |
Canton Facility Restructuring Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  | $ 13 | 13 | 2,881
Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | 0 | 197 |  |  |
Employee Termination [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  | 50 | 961
Employee Termination [Member] | Particulate Matter Product Line Strategic Exit [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  | 139 |
Employee Termination [Member] | Canton Facility Restructuring Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  |  | 1,119
Fixed Asset Impairment [Member] | Particulate Matter Product Line Strategic Exit [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  |  | 2,824
Other Restructuring [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  | 206 | 782
Other Restructuring [Member] | Particulate Matter Product Line Strategic Exit [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  | 2,002 | 70
Other Restructuring [Member] | Canton Facility Restructuring Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  | $ 13 |  | 1,762
Contract Termination [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  |  | 452
Selling, General and Administrative Expenses [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | 2 | 383 |  | 176 | 1,634
Selling, General and Administrative Expenses [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | (31) | 2 |  | 642 | 2,391
Selling, General and Administrative Expenses [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  |  |  |  | 549
Cost of Goods Sold [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | 34 | 132 |  | 37 | 132
Cost of Goods Sold [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | 605 | 340 |  | 1,505 | 503
Cost of Goods Sold [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  | 88 |  |  | 1,659
Design and Development Expense [Member] | Electronics [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  | 52 |  | 43 | 429
Design and Development Expense [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | $ 101 |  |  | 182 |
Design and Development Expense [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense |  | $ 109 |  | $ 13 | $ 673

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