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Fair Values Of Financial Instruments (Carrying Amount And Fair Value Of Debt, Interest Rate Swap And Non-Qualified Plan Assetst) (Details) - Level 2 [Member] $ in Thousands | Sep. 25, 2021 USD ($)
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Carrying Amount [Member] | Non-qualified retirement plan [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | $ 21,062
Carrying Amount [Member] | Interest Rate Swap at Fixed Rate of 3.92% [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 4,531
Fair Value [Member] | Non-qualified retirement plan [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 21,062
Fair Value [Member] | Interest Rate Swap at Fixed Rate of 3.92% [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 4,531
Senior notes, net of unamortized original issue discount [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 350,000
Senior notes, net of unamortized original issue discount [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 358,750
Recovery zone facility bonds [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 63,500
Recovery zone facility bonds [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 63,500
Secured notes payable and other [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 176,014
Secured notes payable and other [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | $ 175,922

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Balance Type: | na
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |