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Business Segment Information - Summary of Net Sales of Company Recognized at a Point in Time Versus Over Time (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 29, 2024
Jul. 01, 2023
Jun. 29, 2024
Jul. 01, 2023
Disaggregation of Revenue [Line Items]        
Total net sales $ 708,529 $ 740,576 $ 1,345,368 $ 1,425,250
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 141,085 135,919 275,292 269,434
Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 273,385 262,650 534,073 510,867
Net Sales Recognized at a Point in Time: [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 527,219 570,637 986,695 1,095,301
Net Sales Recognized at a Point in Time: [Member] | Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 294,059 342,007 536,003 644,949
Net Sales Recognized at a Point in Time: [Member] | Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 141,085 135,919 275,292 269,434
Net Sales Recognized at a Point in Time: [Member] | Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 92,075 92,711 175,400 180,918
Net Sales Recognized Over Time: [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 708,529 740,576 1,345,368 1,425,250
Net Sales Recognized Over Time: [Member] | Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 181,310 $ 169,939 $ 358,673 $ 329,949