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Summary of Information Regarding Stock Options (Detail) - $ / shares
12 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Dec. 28, 2019
Number of Options      
Beginning Balance, number of options 17,650 44,467 89,114
Exercised, number of options (9,080) (26,817) (44,647)
Ending Balance, number of options 8,570 17,650 44,467
Weighted Average Exercise Price per Share      
Beginning Balance, Weighted Average Exercise Price per Share $ 54.16 $ 51.24 $ 50.44
Exercised, Weighted Average Exercise Price per Share 52.97 49.31 49.64
Ending Balance, Weighted Average Exercise Price per Share $ 55.42 $ 54.16 $ 51.24
Options Exercisable, Number of Options      
Options exercisable at the beginning, Number of Options 17,650 44,467 88,114
Options exercisable at the ending, Number of Options 8,570 17,650 44,467
Options Exercisable, Weighted Average Exercise Price per Share      
Options exercisable at the beginning, Weighted Average Exercise Price per Share $ 54.16 $ 51.24 $ 50.35
Options exercisable at the ending, Weighted Average Exercise Price per Share $ 55.42 $ 54.16 $ 51.24