Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended
Sep. 30, 2026 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 1,103,232
Changes due to foreign currency exchange rates	(12,015)
Ending balance	1,091,217
Sterigenics
Goodwill [Roll Forward]
Beginning balance	658,919
Changes due to foreign currency exchange rates	(1,551)
Ending balance	657,368
Nordion
Goodwill [Roll Forward]
Beginning balance	267,771
Changes due to foreign currency exchange rates	(9,238)
Ending balance	258,533
Nelson Labs
Goodwill [Roll Forward]
Beginning balance	176,542
Changes due to foreign currency exchange rates	(1,226)
Ending balance	$ 175,316

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details