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Restructuring Costs - Narrative (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 USD ($) Employee | Sep. 28, 2019 USD ($) | Sep. 26, 2020 USD ($) Employee | Sep. 28, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring | $ 470,000 | $ 0 | $ 926,000 | $ 0
Employee Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring | $ 470,000 |  | $ 926,000 |
Flow Control |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of positions eliminated related to restructuring (employee) | Employee | 4 |  | 34 |
Flow Control | Employee Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring | $ 276,000 |  | $ 732,000 |
Industrial Processing |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of positions eliminated related to restructuring (employee) | Employee | 20 |  | 20 |
Severance costs |  |  | $ 0 |
Industrial Processing | Employee Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring | $ 194,000 |  | $ 194,000 |
Number of positions eliminated related to restructuring (employee) | Employee |  |  | 21 |

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