Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

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		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Disaggregation of Revenue [Line Items]
Total net sales	$ 799,887	$ 740,305	$ 2,232,924	$ 2,085,673
Chemistry consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	158,480	138,935	461,102	414,227
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	299,923	278,294	859,030	812,367
Net Sales Recognized at a Point in Time: [Member]
Disaggregation of Revenue [Line Items]
Total net sales	594,891	553,056	1,650,209	1,539,751
Net Sales Recognized at a Point in Time: [Member] \| Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	341,484	323,076	912,792	859,079
Net Sales Recognized at a Point in Time: [Member] \| Chemistry consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	158,480	138,935	461,102	414,227
Net Sales Recognized at a Point in Time: [Member] \| Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	94,927	91,045	276,315	266,445
Net Sales Recognized Over Time: [Member]
Disaggregation of Revenue [Line Items]
Total net sales	799,887	740,305	2,232,924	2,085,673
Net Sales Recognized Over Time: [Member] \| Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 204,996	$ 187,249	$ 582,715	$ 545,922