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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. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Disaggregation of Revenue [Line Items]
Total net sales	$ 771,332	$ 708,529	$ 1,433,037	$ 1,345,368
Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	164,985	141,085	302,622	275,292
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	297,932	273,385	559,107	534,073
Net Sales Recognized at a Point in Time: [Member]
Disaggregation of Revenue [Line Items]
Total net sales	573,820	527,219	1,055,318	986,695
Net Sales Recognized at a Point in Time: [Member] | Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	308,415	294,059	571,308	536,003
Net Sales Recognized at a Point in Time: [Member] | Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	164,985	141,085	302,622	275,292
Net Sales Recognized at a Point in Time: [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	100,420	92,075	181,388	175,400
Net Sales Recognized Over Time: [Member]
Disaggregation of Revenue [Line Items]
Total net sales	771,332	708,529	1,433,037	1,345,368
Net Sales Recognized Over Time: [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 197,512	$ 181,310	$ 377,719	$ 358,673

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