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Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2022 USD ($) Segment $ / shares shares | Dec. 25, 2021 USD ($) $ / shares shares | Dec. 26, 2020 shares
Significant Accounting Policies [Line Items] |  |  |
Number of reporting units | Segment | 2 |  |
Stock options excluded from calculation of diluted earnings per share, antidilutive | shares | 0 | 0 | 0
Dividends payable per share | $ / shares | $ 2 | $ 2 |
Dividend payable date | Jan. 20, 2023 | Jan. 21, 2022 |
Dividend record date | Jan. 06, 2023 | Jan. 07, 2022 |
Dividends payable | $ 71,854,000 | $ 75,387,000 |
Dividend announced date | Dec. 06, 2022 | Dec. 07, 2021 |
Restricted Cash | $ 4,049,000 |  |
Short-term investments | $ 53,955,000 | $ 35,778,000 |
Buildings And Improvements |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 30 years |  |
Trailing Equipment | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 10 years |  |
Trailing Equipment | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 7 years |  |
Hardware And Software | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 7 years |  |
Hardware And Software | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 3 years |  |
Commercial Trucking Claims |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained aggregate liability | $ 10,000,000 |  |
Self insurance excess value maintain third party | 5,000,000 |  |
Commercial Trucking Claims | Initial Excess Policy [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 5,000,000 |  |
Commercial Trucking Claims | Third Party Insurance [Member] | Excess Coverage Policy [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Self insurance excess value maintain third party | 10,000,000 |  |
Commercial Trucking Claims | Retained Liability Maximum In Aggregate For Three Year Policy From May 1 2019 To April 30 2022 [Member] | Initial Excess Policy [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained aggregate liability | 10,000,000 |  |
Commercial Trucking Claims | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 10,000,000 |  |
Commercial Trucking Claims | Maximum | Initial Excess Policy [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained aggregate liability | 10,000,000 |  |
Commercial Trucking Claims | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 5,000,000 |  |
Commercial Trucking Claims | Minimum | Initial Excess Policy [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained aggregate liability | 5,000,000 |  |
Commercial Trucking Claims | Minimum | Third Party Insurance [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 5,000,000 |  |
General Liability Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 1,000,000 |  |
Workers' Compensation Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 250,000 |  |
Workers' Compensation Claim | BCO Independent Contractor |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 750,000 |  |
Cargo Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 250,000 |  |
Occupational Reinsurance Claims One [Member] | BCO Independent Contractor |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 500,000 |  |
Occupational Reinsurance Claims Two [Member] | BCO Independent Contractor |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 1,000,000 |  |
Occupational Reinsurance Claims Three [Member] | BCO Independent Contractor |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | $ 2,000,000 |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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