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Restructuring and Asset Impairment Charges - Restructuring Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018
Restructuring Reserve [Roll Forward] |  |  |  |
Charged to Expenses 2019 | $ 672 | $ 0 | $ 672 | $ 0
2018 Restructuring Plan |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at Beginning of Year |  |  | 11,907 |
Deductions 2019 |  |  | 6,262 |
Charged to Expenses 2019 |  |  | 672 |
Balance at September 29, 2019 | 6,317 |  | 6,317 |
2018 Restructuring Plan | Workforce Reduction |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at Beginning of Year |  |  | 10,763 |
Deductions 2019 |  |  | 5,892 |
Charged to Expenses 2019 |  |  | 0 |
Balance at September 29, 2019 | 4,871 |  | 4,871 |
2018 Restructuring Plan | Other Exit Costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at Beginning of Year |  |  | 1,144 |
Deductions 2019 |  |  | 370 |
Charged to Expenses 2019 |  |  | 672 |
Balance at September 29, 2019 | $ 1,446 |  | $ 1,446 |

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