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v3.20.4

Summary of Information Regarding Stock Options (Detail) - $ / shares | 12 Months Ended
--- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Number of Options |  |  |
Beginning Balance, number of options | 44,467 | 89,114 | 189,040
Exercised, number of options | (26,817) | (44,647) | (99,926)
Ending Balance, number of options | 17,650 | 44,467 | 89,114
Weighted Average Exercise Price per Share |  |  |
Beginning Balance, Weighted Average Exercise Price per Share | $ 51.24 | $ 50.44 | $ 49.34
Exercised, Weighted Average Exercise Price per Share | 49.31 | 49.64 | 48.36
Ending Balance, Weighted Average Exercise Price per Share | $ 54.16 | $ 51.24 | $ 50.44
Options Exercisable, Number of Options |  |  |
Options exercisable at the beginning, Number of Options | 44,467 | 88,114 | 169,240
Options exercisable at the ending, Number of Options | 17,650 | 44,467 | 88,114
Options Exercisable, Weighted Average Exercise Price per Share |  |  |
Options exercisable at the beginning, Weighted Average Exercise Price per Share | $ 51.24 | $ 50.35 | $ 48.50
Options exercisable at the ending, Weighted Average Exercise Price per Share | $ 54.16 | $ 51.24 | $ 50.35

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Abstract] + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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