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Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) (Foreign Exchange Forward [Member], Other Current Liabilities [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012
Foreign Exchange Forward [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts	$ 13	$ 17	$ 91

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement.

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