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Restructuring, Acquisition, and Related Costs (Tables) | 9 Months Ended
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Oct. 01, 2021
Restructuring And Related Activities [Abstract] |
Schedule of Restructuring, Acquisition and Related Costs | The following table summarizes restructuring, acquisition, and related costs in the accompanying consolidated statements of operations (in thousands):
| Three Months Ended |  |  | Nine Months Ended |
| October 1, |  |  | October 2, |  |  | October 1, |  |  | October 2, |
| 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
2020 restructuring | $ | 5,185 |  |  | $ | 1,006 |  |  | $ | 7,688 |  |  | $ | 1,006 |
2019 restructuring |  | — |  |  |  | 68 |  |  |  | 208 |  |  |  | 667 |
2018 restructuring |  | — |  |  |  | — |  |  |  | — |  |  |  | 754 |
Total restructuring charges | $ | 5,185 |  |  | $ | 1,074 |  |  | $ | 7,896 |  |  | $ | 2,427 |
Acquisition and related charges |  | 2,935 |  |  |  | 613 |  |  |  | 8,589 |  |  |  | 3,164 |
Total restructuring, acquisition, and related costs | $ | 8,120 |  |  | $ | 1,687 |  |  | $ | 16,485 |  |  | $ | 5,591 |
Summary of Restructuring Charges by Reportable Segment | The following table summarizes restructuring costs associated with the 2020 restructuring program by reportable segment (in thousands):
| Three Months Ended |  |  | Nine Months Ended |
| October 1, |  |  | October 2, |  |  | October 1, |  |  | October 2, |
| 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Photonics | $ | 2,349 |  |  | $ | — |  |  | $ | 2,839 |  |  | $ | — |
Vision |  | 193 |  |  |  | 1,006 |  |  |  | 890 |  |  |  | 1,006 |
Precision Motion |  | 2,643 |  |  |  | — |  |  |  | 3,959 |  |  |  | — |
Unallocated Corporate and Shared Services |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total | $ | 5,185 |  |  | $ | 1,006 |  |  | $ | 7,688 |  |  | $ | 1,006 |
Summary of Accrual Activities by Components Related to Company's Restructuring Plans | The following table summarizes the accrual activities, by component, related to the Company’s restructuring plans recorded in the accompanying consolidated balance sheets (in thousands):
| Total |  |  | Severance |  |  | Facility |  |  | Other |
Balance at December 31, 2020 | $ | 1,800 |  |  | $ | 1,681 |  |  | $ | 116 |  |  | $ | 3 |
Restructuring charges |  | 7,896 |  |  |  | 6,292 |  |  |  | 1,183 |  |  |  | 421 |
Cash payments |  | (2,333 | ) |  |  | (1,837 | ) |  |  | (215 | ) |  |  | (281 | )
Non-cash charges and other adjustments (1) |  | (3,486 | ) |  |  | (2,981 | ) |  |  | (505 | ) |  |  | — |
Balance at October 1, 2021 | $ | 3,877 |  |  | $ | 3,155 |  |  | $ | 579 |  |  | $ | 143 |
(1) | Non-cash charges included stock compensation charges amounting to $3.0 million associated with severance agreements for certain employees.

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- Definition Tabular disclosure of costs incurred for restructuring and acquisition related activities. + References No definition available. + Details
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- Definition Tabular disclosure of restructuring charges for each reportable segment. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + 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)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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