Intangible Assets - Summary of Acquired Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 56,837	$ 30,097
Accumulated Amortization	25,453	24,166
Manufacturing Technologies, Core Products and Cell Lines [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	21,962	11,582
Accumulated Amortization	11,270	10,906
Tradenames, Licenses and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,852	6,410
Accumulated Amortization	3,835	3,296
Customer Lists and Relationships, and Supply Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24,283	12,105
Accumulated Amortization	10,255	$ 9,964
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	740
Accumulated Amortization	$ 93