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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+ Details

- 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.

+ References

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+ Details

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Revenue Recognition (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Total	$ 324,886	$ 311,312	$ 926,306	$ 860,176
Deferred revenue	15,126		15,126		$ 17,999
Point in time
Disaggregation of Revenue [Line Items]
Total	261,418	254,153	747,370	692,347
Over time
Disaggregation of Revenue [Line Items]
Total	63,468	57,159	178,936	167,829
Sterigenics
Disaggregation of Revenue [Line Items]
Total	209,305	192,845	607,011	557,368
Sterigenics \| Point in time
Disaggregation of Revenue [Line Items]
Total	209,305	192,845	607,011	557,368
Sterigenics \| Over time
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Nordion
Disaggregation of Revenue [Line Items]
Total	55,024	62,805	146,182	137,793
Nordion \| Point in time
Disaggregation of Revenue [Line Items]
Total	52,113	61,308	140,359	134,979
Nordion \| Over time
Disaggregation of Revenue [Line Items]
Total	2,911	1,497	5,823	2,814
Nelson Labs
Disaggregation of Revenue [Line Items]
Total	60,557	55,662	173,113	165,015
Nelson Labs \| Point in time
Disaggregation of Revenue [Line Items]
Total	0	0	0	0
Nelson Labs \| Over time
Disaggregation of Revenue [Line Items]
Total	$ 60,557	$ 55,662	$ 173,113	$ 165,015