Contracts Categorized in Level 2 of Fair Value Hierarchy (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward contracts- Liability	$ (605)	$ (276)
Foreign currency forward contracts- Asset	2,460	1,318
Total	1,855	1,042
Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward contracts- Liability	(605)	(276)
Foreign currency forward contracts- Asset	2,460	1,318
Total	$ 1,855	$ 1,042

Fair value of the gross assets less the gross liabilities of a derivative asset or group of derivative assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 825

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 825

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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13495-108611

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant