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Schedule of Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Schedule of Unrecognized Tax Benefits [Line Items]
Balance at April 1,	$ 14,868	$ 15,727	$ 15,220
Additions based on tax positions related to the current year	4,393	2,041	2,813
Additions based on tax positions related to prior years	2,217
Reductions for tax positions of prior years	(1,412)	(2,900)	(1,375)
Exchange rate fluctuation
Settlement and lapse of statute of limitations			(931)
Balance at March 31,	$ 20,066	$ 14,868	$ 15,727

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Unrecognized Tax Benefits Exchange Rate Fluctuation.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854



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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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