Derivative Instruments Notional Amounts Outstanding under Foreign Currency Contracts (Detail) (Foreign Exchange Contract, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013
Not Designated as Hedging Instrument
Derivative [Line Items]
Fair Value of Assets		$ 8
Fair Value of Liabilities		5
Not Designated as Hedging Instrument | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Fair Value of Assets	0	8
Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Buy Currency, Korean Won; Sell Currency, US Dollar
Derivative [Line Items]
Fair Value of Assets		0
Fair Value of Liabilities		2
Not Designated as Hedging Instrument | Buy Currency, U.S. Dollar; Sell Currency, Israeli Shekel
Derivative [Line Items]
Fair Value of Assets		0
Fair Value of Liabilities		3
Not Designated as Hedging Instrument | Buy Currency, U.S. Dollar; Sell Currency, Singapore Dollar
Derivative [Line Items]
Fair Value of Assets		0
Fair Value of Liabilities		0
Not Designated as Hedging Instrument | Long
Derivative [Line Items]
Notional Amount		3,988
Not Designated as Hedging Instrument | Long | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Notional Amount	2,494	2,770
Not Designated as Hedging Instrument | Long | Buy Currency, Korean Won; Sell Currency, US Dollar
Derivative [Line Items]
Notional Amount		686
Not Designated as Hedging Instrument | Long | Buy Currency, U.S. Dollar; Sell Currency, Israeli Shekel
Derivative [Line Items]
Notional Amount		301
Not Designated as Hedging Instrument | Long | Buy Currency, U.S. Dollar; Sell Currency, Singapore Dollar
Derivative [Line Items]
Notional Amount		231
Not Designated as Hedging Instrument | Short
Derivative [Line Items]
Notional Amount		3,985
Not Designated as Hedging Instrument | Short | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Notional Amount	2,494	2,762
Not Designated as Hedging Instrument | Short | Buy Currency, Korean Won; Sell Currency, US Dollar
Derivative [Line Items]
Notional Amount		688
Not Designated as Hedging Instrument | Short | Buy Currency, U.S. Dollar; Sell Currency, Israeli Shekel
Derivative [Line Items]
Notional Amount		304
Not Designated as Hedging Instrument | Short | Buy Currency, U.S. Dollar; Sell Currency, Singapore Dollar
Derivative [Line Items]
Notional Amount		231
Designated as Hedging Instrument | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Fair Value of Assets	128
Fair Value of Liabilities	0
Designated as Hedging Instrument | Long | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Notional Amount	2,037
Designated as Hedging Instrument | Short | Buy Currency, U.S. Dollar; Sell Currency, Japanese Yen
Derivative [Line Items]
Notional Amount	$ 1,909