Acquisitions - Results of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition, Pro Forma Information [Abstract]
Amortization of acquired intangible assets	$ 24,200	$ 17,100	$ 14,800
Net loss attributable to noncontrolling interest	(111)
Tec-Sem Group AG
Business Acquisition, Pro Forma Information [Abstract]
Actual revenues	11,600
Actual net income (loss)	(1,200)
Inventory step up	700
Amortization of acquired intangible assets	2,100
4titude Limited
Business Acquisition, Pro Forma Information [Abstract]
Actual revenues	15,900
Actual net income (loss)	(800)
Inventory step up	1,200
Amortization of acquired intangible assets	4,100
PBMMI and Novare
Business Acquisition, Pro Forma Information [Abstract]
Actual revenues	11,500	3,400
Actual net income (loss)	700	800
Amortization of acquired intangible assets	1,600	300
Cool Lab, LLC
Business Acquisition, Pro Forma Information [Abstract]
Actual revenues	3,700	3,700
Actual net income (loss)	(200)	(300)
Inventory step up		400
Amortization of acquired intangible assets	1,600	1,200
BioStorage Technologies, Inc.
Business Acquisition, Pro Forma Information [Abstract]
Actual revenues	74,700	62,800	44,600
Actual net income (loss)	12,600	9,300	2,400
Amortization of acquired intangible assets	$ 5,500	$ 4,600	$ 2,900