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Business Combinations - Unaudited Pro forma Consolidated Results of Operations (Detail) - Ham-Let [Member] - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 25, 2021
Jun. 26, 2020
Jun. 25, 2021
Jun. 26, 2020
Business Acquisition [Line Items]        
Revenues $ 515.2 $ 391.8 $ 989.1 $ 760.9
Net income $ 23.1 $ 13.1 $ 54.1 $ 4.0
Basic income per share $ 0.53 $ 0.33 $ 1.29 $ 0.10
Diluted income per share $ 0.52 $ 0.32 $ 1.26 $ 0.10