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Shareholders' Equity - (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 24, 2020 | Dec. 29, 2021 | Dec. 30, 2020 | Dec. 25, 2019
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Balance as of beginning period |  | $ (130,446) | $ (138,064) | $ (133,345)
Settlement loss recognized |  | 0 | (95) |
Income tax expense |  | (2,642) | 9,432 | 10,320
Balance as of end of period |  | (65,265) | (130,446) | (138,064)
Pensions |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Balance as of beginning period |  | (978) | (781) | (827)
Benefit obligation actuarial gain (loss) |  | (46) | (448) | (25)
Settlement loss recognized |  |  | 95 |
Income tax expense |  | (35) | 67 | (15)
Balance as of end of period |  | (900) | (978) | (781)
Derivatives |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Balance as of beginning period |  | (59,427) | (33,179) | (3,319)
Reclassification |  | 4,023 | 3,160 | 291
Changes in the fair value of cash flow derivatives |  | 4,275 | (46,910) | (40,486)
Income tax expense |  | (2,607) | 9,365 | 10,335
Balance as of end of period |  | (53,570) | (59,427) | (33,179)
Estimated reclassification from other comprehensive loss to interest expense related to the interest rate swaps over the next 12 months |  | 4,000 |  |
Derivatives |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Reclassification | $ 7,400 |  | 7,354 |
Derivatives |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Reclassification |  | 166 | 783 |
Estimated reclassification from other comprehensive loss to interest expense related to the interest rate swaps over the next 12 months |  | 100 |  |
Amortization of net loss |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Reclassification |  | 159 | 89 | 86
Accumulated Other Comprehensive Loss |  |  |  |
AOCI Attributable To Parent, Net Of Tax [Roll Forward] |  |  |  |
Balance as of beginning period |  | (60,405) | (33,960) | (4,146)
Balance as of end of period |  | $ (54,470) | $ (60,405) | $ (33,960)

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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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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80845-113994 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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