Goodwill and Intangible Assets - Goodwill Roll Forward - Tabular Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 513,623	$ 469,356
Acquisitions	242,789	57,854
Currency translation adjustments	27,927	(13,587)
Goodwill, ending balance	784,339	513,623
Life Sciences Products
Goodwill [Roll Forward]
Goodwill, beginning balance	154,612	110,138
Acquisitions	242,789	57,854
Currency translation adjustments	27,903	(13,380)
Goodwill, ending balance	425,304	154,612
Life Sciences Services
Goodwill [Roll Forward]
Goodwill, beginning balance	359,011	359,218
Currency translation adjustments	24	(207)
Goodwill, ending balance	$ 359,035	$ 359,011