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Common Stock and Stock-Based Compensation - Additional Information (Detail) - $ / shares |  |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 19, 2021 | Mar. 01, 2021 | Mar. 01, 2020 | Mar. 01, 2019 | Jan. 01, 2019 | Sep. 25, 2021 | Dec. 26, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock option outstanding |  |  |  |  |  | 229,432 | 241,847
Other than options granted in period |  |  |  |  |  | 17,821 |
Weighted average fair value of stock awards |  |  |  |  |  | $ 877.10 |
Non-Employee Director |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted in period | 1,422 |  |  |  |  |  |
Options granted in period - weighted average fair value | $ 484.33 |  |  |  |  |  |
Restricted Stock Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Other than options granted in period |  | 7,817 |  |  |  |  |
Vesting period |  | 4 years | 4 years | 4 years | 5 years |  |
Weighted average fair value of stock awards |  | $ 1,028.71 |  |  |  |  |
Restricted Stock Awards | Chief Executive Officer |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Other than options granted in period |  |  | 4,861 |  |  |  |
Vesting period |  |  | 5 years |  |  |  |
Performance Based Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock option outstanding |  |  |  |  |  | 30,049 |
Total shares outstanding |  |  |  |  |  | 2,696 |
Performance Based Awards | Employee Stock Compensation Plan | Senior Management |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted in period |  | 8,063 |  |  |  |  |
Options granted in period - weighted average fair value |  | $ 449.93 |  |  |  |  |
Service-Based Stock Options | Employee Stock Compensation Plan | Chief Executive Officer |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted in period |  | 10,935 |  |  |  |  |
Options granted in period - weighted average fair value |  | $ 457.25 |  |  |  |  |
Investment Share Program | Employee Stock Compensation Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares employees elected to purchase |  | 4,954 |  |  |  |  |
Weighted average fair value of stock awards |  | $ 502.32 |  |  |  |  |

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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