Derivative Instruments and Hedging Activities - Notional Values of Company's Derivative Financial Instruments (Detail) - Not Designated as Hedging Instrument [Member]	Sep. 30, 2015 CNY (¥) Instruments	Sep. 30, 2015 MXN Instruments
Mexican Peso (MXN) Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Number of Foreign Currency Forward Contracts Held	16	16
Notional Amount of Foreign Currency Forward Contracts | MXN		MXN 95,741,000
Chinese Yuan (CNH) Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Number of Foreign Currency Forward Contracts Held	14	14
Notional Amount of Foreign Currency Forward Contracts | ¥	¥ 59,176,000