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Selected Quarterly Financial Data - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 30, 2021 | Jan. 28, 2021 | Jan. 01, 2022 | Sep. 25, 2021 | Jun. 26, 2021 | Mar. 27, 2021 | Dec. 26, 2020 | Sep. 26, 2020 | Jun. 27, 2020 | Mar. 28, 2020 | Jun. 26, 2021 | Jan. 01, 2022 | Dec. 26, 2020 | Dec. 28, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash pension settlement charges |  |  | $ 19,900 |  |  |  |  |  |  |  |  | $ 19,855 | $ 0 | $ 0
Gain on sale of building |  |  | 4,100 |  |  | $ 1,900 |  |  |  |  |  |  |  |
Integration cost |  |  | 3,600 | $ 2,000 | $ 500 | 800 | $ 700 | $ 300 | $ 100 |  |  |  |  |
Asset retirement expense |  |  | 700 |  |  |  |  |  | 200 |  |  |  |  |
Restructuring costs |  |  | 200 |  |  | 400 |  |  |  | $ 4,000 |  |  |  |
Increase to coal mining reserve |  |  | 200 |  |  |  |  |  | 1,800 |  |  |  |  |
Restructuring, impairment and other costs |  |  |  | 800 |  |  | $ 800 | 1,300 | 1,800 |  |  | 2,158 | 41,716 | 13,033
Impairment charges |  |  |  | $ 100 | 500 |  |  | $ 100 |  |  |  | 0 | 36,078 | 322
Other asset impairment charges |  |  |  |  |  |  |  |  | $ 33,800 |  |  |  |  |
Electronics |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring, impairment and other costs |  |  |  |  | 800 |  |  |  |  |  |  | 1,124 | 2,540 | 5,501
Impairment charges |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0
Carling Technologies |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment | $ 6,400 |  | $ 1,600 |  |  |  |  |  |  |  |  |  |  |
Hartland Controls |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory adjustment |  | $ 6,800 |  |  | 3,300 | $ 3,500 |  |  |  |  |  |  |  |
Hartland Controls | Electronics |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of properties |  |  |  |  | $ (1,000) |  |  |  |  |  | $ 900 | $ 5,000 |  |

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