Acquisitions - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Feb. 11, 2020	Sep. 30, 2019	Nov. 15, 2018
Goodwill
Goodwill	$ 498,502		$ 488,602
Brooks Semiconductor Solutions Group
Goodwill
Goodwill	47,966		47,847
Brooks Life Sciences
Goodwill
Goodwill	$ 450,536		$ 440,755
GENEWIZ
Goodwill
Goodwill				$ 235,160
GENEWIZ | Brooks Life Sciences
Goodwill
Goodwill				235,200
Goodwill deductible for tax purposes				$ 0
RURO, Inc.
Goodwill
Goodwill		$ 11,117
RURO, Inc. | Brooks Life Sciences
Goodwill
Goodwill		$ 11,100