Acquisitions - Amounts of Assets and Liabilities at Fair Value as of Acquisition Date (Detail) - USD ($) $ in Thousands	Nov. 28, 2016	Nov. 30, 2015	Dec. 31, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Goodwill			$ 210,587	$ 202,138
Cool Lab, LLC
Business Acquisition [Line Items]
Inventory	$ 1,283
Intangible assets	6,100
Goodwill	8,527
Accrued liabilities	(30)
Other liabilities	(686)
Total purchase price, net of cash acquired	$ 15,194
BioStorage Technologies, Inc.
Business Acquisition [Line Items]
Accounts receivable		$ 16,942
Prepaid expenses and other current assets		321
Property, plant and equipment		14,345
Intangible assets		41,460
Goodwill		79,639
Other assets		53
Debt assumed		(385)
Accounts payable		(1,708)
Accrued liabilities		(9,423)
Deferred revenue		(1,766)
Long-term deferred tax liabilities		(14,169)
Other liabilities		(61)
Total purchase price, net of cash acquired		$ 125,248