Acquisitions - Purchase Consideration (Details) - USD ($) $ in Thousands							12 Months Ended
	Aug. 22, 2017	Jul. 05, 2017	Nov. 28, 2016	Nov. 30, 2015	Aug. 14, 2015	Oct. 01, 2014	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Net cash outflow							$ 44,791	$ 125,248	$ 14,450
Non-cash consideration transferred							10,348
PBMMI and Novare
Business Acquisition [Line Items]
Total purchase price		$ 34,300
Debt repayments		$ 600
Cool Lab, LLC
Business Acquisition [Line Items]
Total purchase price			$ 15,200
Payments to acquire businesses			4,800
Liabilities incurred			100
Non-cash consideration transferred			10,300
Equity method investments, fair value disclosure			3,100
Convertible debt securities and warrants			5,600
Term notes, fair value disclosure			1,600
Aggregate carrying value			$ 8,600
Gain of fair value measurement included in earnings							$ 1,600
RURO, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 5,500
Payments to acquire businesses	5,200
Liabilities incurred	$ 400
BioStorage Technologies, Inc.
Business Acquisition [Line Items]
Total purchase price				$ 125,200
Payments to acquire businesses				130,700
Seller's cash				2,800
Net cash outflow				128,000
Retention arrangements				2,500
Debt repayments				3,200
Transaction costs				$ 2,900
Contact Co., Ltd
Business Acquisition [Line Items]
Total purchase price					$ 6,800
Payments to acquire businesses					1,900
Seller's debt					8,800
Seller's cash					4,800
Contingent consideration					$ 800
FluidX
Business Acquisition [Line Items]
Total purchase price						$ 15,500