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Employee Benefit Plans - Additional Information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 25, 2021 USD ($) Multiemployerpensionplan | Sep. 30, 2023 USD ($) Member | Sep. 24, 2022 USD ($) | Sep. 25, 2021 USD ($)
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Settlement charge |  | $ 0 | $ 840,000 | $ 958,000
Estimated obligation due to withdrawal multi employer pension plans |  | 21,398,000 | 22,496,000 |
Number of voluntary partial withdrawal from multi employer pension plans | Multiemployerpensionplan | 1 |  |  |
Increase in estimated obligation due to withdrawal multi employer pension plans | $ 4,300,000 |  |  |
Health and Welfare Benefits and Defined Annuity Plans [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Contributions |  | $ 881,000 | 1,045,000 | 1,241,000
United States [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Percentage threshold of the greater of projected benefit obligation and market-related value plan assets as unrecognized actuarial gains and losses (in hundredths) |  | 10.00% |  |
Pension Benefits [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Contributions for defined benefit pension plan |  | $ 4,000,000 | 3,330,000 | 6,270,000
Number of members on the Benefits Committee | Member |  | 5 |  |
Defined benefit plan expected future benefit payments |  | $ 4,000,000 |  |
Pension settlement payments to either terminated or retired individuals |  | 2,639,000 | 3,332,000 | 3,859,000
Settlement threshold amount |  | 3,306,000 | 2,459,000 | 2,263,000
Settlement charge |  | 0 | 840,000 | 958,000
Retiree Health and Life Benefits [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Contributions for defined benefit pension plan |  | 412,000 | 626,000 |
Pension settlement payments to either terminated or retired individuals |  | 0 | 0 |
Settlement charge |  | $ 0 | $ 0 | 0
Health care cost trend (in hundredths), twenty forty |  | 4.00% |  |
Health care cost trend rate (in hundredths) |  | 5.33% | 5.33% |
Percentage of sensitivity increase or decrease of assumed health care cost trend rates (in hundredths) |  | 1.00% |  |
Maximum [Member] | Pension Benefits [Member] | Fixed income securities [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Allocation percentage of plan assets (in hundredths) |  | 90.00% |  |
Maximum [Member] | Pension Benefits [Member] | Equity securities [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Allocation percentage of plan assets (in hundredths) |  | 20.00% |  |
Minimum [Member] | Pension Benefits [Member] | Fixed income securities [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Allocation percentage of plan assets (in hundredths) |  | 80.00% |  |
Minimum [Member] | Pension Benefits [Member] | Equity securities [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Allocation percentage of plan assets (in hundredths) |  | 10.00% |  |
Retiree Health and Life Benefits [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Employer contribution match amount |  | $ 0.50 |  |
Contribution costs to the 401(k) Plan |  | $ 4,493,000 | $ 4,059,000 | $ 3,880,000
Retiree Health and Life Benefits [Member] | Maximum [Member] |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |
Eligible compensation match percentage |  | 6.00% |  |

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