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Accumulated Other Comprehensive Income or Loss - Schedule Of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of the year, net of tax |  | $ 778,182 | $ 766,068 | $ 782,869
Other comprehensive income (loss), net of tax |  | 541 | (2,183) | 4,434
Balance at end of the year, net of tax |  | 743,490 | 778,182 | 766,068
Total accumulated other comprehensive income |  | 1,337 | 796 | 2,979
Interest rate swap |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other comprehensive income before reclassifications |  | 4,471 | 1,419 | 0
Income tax expense |  | (1,051) | (332) | 0
Other comprehensive income, net of tax, before reclassifications |  | 3,420 | 1,087 | 0
Reclassification into net earnings | [1] | (2,311) | (1,832) | 0
Income tax benefit | [2] | 544 | 429 | 0
Amounts reclassified out of AOCI, net of tax |  | (1,767) | (1,403) | 0
Other comprehensive income (loss), net of tax |  | 1,653 | (316) | 0
Total accumulated other comprehensive income |  | 1,337 | (316) |
Postretirement benefit plans |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other comprehensive income before reclassifications |  | 0 | 203 | 6,576
Income tax expense |  | 0 | (51) | (1,614)
Other comprehensive income, net of tax, before reclassifications |  | 0 | 152 | 4,962
Reclassification into net earnings | [3] | (1,462) | (2,677) | (701)
Income tax benefit | [2] | 350 | 658 | 173
Amounts reclassified out of AOCI, net of tax |  | (1,112) | (2,019) | (528)
Other comprehensive income (loss), net of tax |  | (1,112) | (1,867) | 4,434
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of the year, net of tax |  | 796 | 2,979 | (1,455)
Other comprehensive income (loss), net of tax |  | 541 | (2,183) | 4,434
Balance at end of the year, net of tax |  | 1,337 | 796 | 2,979
Accumulated Other Comprehensive Income (Loss) [Member] | Interest rate swap |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of the year, net of tax |  | (316) | 0 | 0
Balance at end of the year, net of tax |  | 1,337 | (316) | 0
Accumulated Other Comprehensive Income (Loss) [Member] | Postretirement benefit plans |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of the year, net of tax |  | 1,112 | 2,979 | (1,455)
Balance at end of the year, net of tax |  | $ 0 | $ 1,112 | $ 2,979
[1] | Reclassified from AOCI into Interest expense.
[2] | Reclassified from AOCI into Income tax expense (benefit).
[3] | Reclassified from AOCI into Other, net, or Selling, general and administrative expense. Amounts include amortization of net actuarial loss, amortization of prior service credit, and settlement expense totaling $0.1 million, $0.4 million and $0.7 million in 2024, 2023 and 2022, respectively.

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