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Financial Instruments and Hedging Activities (Quantitative Summary of Fair Value of Derivative Instruments) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Sep. 30, 2013
Derivatives, Fair Value [Line Items]    
Net asset (liability) value of non-hedged derivative instruments $ (3,233) $ 1,157
Foreign currency contracts | Prepaid expenses and other current assets
   
Derivatives, Fair Value [Line Items]    
Asset value of non-hedge derivative instruments 949 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 $ 4,182 $ 1,044