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Net Income per Share - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 28, 2024 $ / shares shares | Dec. 30, 2023 $ / shares shares | Dec. 31, 2022 $ / shares shares | Dec. 26, 2020 shares
Earnings Per Share Note [Line Items] |  |  |  |
Net income per common share - basic | $ / shares | $ 5.07 | $ 6.23 | $ 5.46 |
Conversion ratio for Class B to Class A shares | shares |  |  |  | 1
Performance-Based Awards |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |
Number of shares not included because the performance criteria was not expected to be met | shares | 52,000 | 54,000 | 1,000 |
Common Class A |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |
Net income per common share - basic | $ / shares | $ 5.07 | $ 6.23 | $ 5.46 |
Antidilutive securities excluded from computation of earnings per share | shares | 142,000 | 52,000 | 17,000 |
Common Class B |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |
Net income per common share - basic | $ / shares | $ 5.07 | $ 6.23 | $ 5.46 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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