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Restructuring Charges - Restructuring Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2020 | Dec. 29, 2019 | Sep. 29, 2019 | Oct. 04, 2020 | Sep. 29, 2019
Restructuring Reserve [Roll Forward] |  |  |  |  |
2020 | $ 1,881 |  | $ (672) | $ 3,156 | $ (672)
2018 Restructuring Plan [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 2,672 |
2020 |  |  |  | (1,651) |
2020 |  |  |  | (922) |
Balance at September 29, 2019 | 99 | $ 2,672 |  | 99 |
2018 Restructuring Plan [Member] | Workforce Reduction |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 1,898 |
2020 |  |  |  | (1,576) |
2020 |  |  |  | (223) |
Balance at September 29, 2019 | 99 | 1,898 |  | 99 |
2018 Restructuring Plan [Member] | Other Exit Costs |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 774 |
2020 |  |  |  | (75) |
2020 |  |  |  | (699) |
Balance at September 29, 2019 | 0 | 774 |  | 0 |
2019 Restructuring Plan [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 8,773 |
2020 |  |  |  | (2,787) |
2020 |  | (9,000) |  | (2,234) |
Balance at September 29, 2019 | 3,752 | 8,773 |  | 3,752 |
2019 Restructuring Plan [Member] | Workforce Reduction |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 8,634 |
2020 |  |  |  | (2,648) |
2020 |  |  |  | (2,234) |
Balance at September 29, 2019 | 3,752 | 8,634 |  | 3,752 |
2019 Restructuring Plan [Member] | Other Exit Costs |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at Beginning of Year |  |  |  | 139 |
2020 |  |  |  | (139) |
2020 |  |  |  | 0 |
Balance at September 29, 2019 | $ 0 | $ 139 |  | $ 0 |

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 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 + Details
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