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Summary of Restructuring Charges by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2021 | Oct. 02, 2020 | Oct. 01, 2021 | Oct. 02, 2020
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring costs | $ 5,185 | $ 1,074 | $ 7,896 | $ 2,427
2020 Restructuring |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring costs | 5,185 | 1,006 | 7,688 | 1,006
2020 Restructuring | Photonics |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring costs | 2,349 |  | 2,839 |
2020 Restructuring | Vision |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring costs | 193 | $ 1,006 | 890 | $ 1,006
2020 Restructuring | Precision Motion |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring costs | $ 2,643 |  | $ 3,959 |

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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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