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Shareholders' Equity - (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2023 | Dec. 28, 2022 | Dec. 29, 2021
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Balance as of beginning period | $ (37,116) | $ (65,265) | $ (130,446)
Settlement loss recognized | 35 | 74 |
Plan closure loss | 74 | 0 |
Income tax (expense) benefit | (616) | (3,643) | (2,642)
Balance as of end of period | (62,686) | (37,116) | (65,265)
Effective Interest Rate Swaps |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Expect reclassification within next twelve months | 6,100 |  |
Pensions |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Balance as of beginning period | (555) | (900) | (978)
Benefit obligation actuarial gain (loss) | (98) | 261 | (46)
Settlement loss recognized | 35 | 74 |
Income tax (expense) benefit | 151 | (113) | (35)
Balance as of end of period | (337) | (555) | (900)
Amortization of net loss |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Reclassification | 56 | 123 | 159
Derivatives |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Balance as of beginning period | (42,142) | (53,570) | (59,427)
Reclassification | (5,028) | 1,310 | 4,023
Changes in the fair value of cash flow derivatives | 6,262 | 13,619 | 4,275
Income tax (expense) benefit | (767) | (3,530) | (2,607)
Balance as of end of period | (41,322) | (42,142) | (53,570)
Derivatives | Dedesignated Interest Rate Swaps Member |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Balance as of end of period | 64,200 |  |
Derivatives |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Reclassification | 353 | 29 | 166
Derivatives | Dedesignated Interest Rate Swaps Member |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Reclassification | 400 | 100 | 200
Expect reclassification within next twelve months | 800 |  |
Accumulated Other Comprehensive Loss |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |
Balance as of beginning period | (42,697) | (54,470) | (60,405)
Balance as of end of period | $ (41,659) | $ (42,697) | $ (54,470)

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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