Financial Instruments and Hedging Activities (Quantitative Summary of Fair Value of Derivative Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Derivatives, Fair Value [Line Items]
Net asset (liability) value of non-hedged derivative instruments	$ 895	$ 1,157
Foreign currency contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset value of non-hedge derivative instruments	895	2,201
Security Price Guarantees | Accrued Expenses And Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0	$ 1,044