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Common Stock and Stock-Based Compensation - Summary of Vesting Activities for Investment Share Program and Restricted Stock Awards (Detail)
6 Months Ended
Jun. 27, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-vested at beginning of period | shares 122,142
Granted | shares 40,316
Vested | shares (45,169)
Forfeited | shares (3,318)
Non-vested at end of period | shares 113,971
Non-vested at beginning of period | $ / shares $ 213.52
Granted | $ / shares 325.12
Vested | $ / shares 213.12
Forfeited | $ / shares 241.05
Non-vested at end of period | $ / shares $ 252.36