Intangible Assets - Summary of Acquired Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 30,678	$ 28,777
Accumulated Amortization	21,837	20,720
Manufacturing technologies, core products and cell lines [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	11,723	11,676
Accumulated Amortization	10,375	10,097
Trademarks, licenses and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,474	4,748
Accumulated Amortization	2,481	2,130
Customer lists and supply agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	12,481	12,353
Accumulated Amortization	$ 8,981	$ 8,493