Annual report pursuant to section 13 and 15(d)

Contingent Liabilities (Parenthetical) (Detail)

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Contingent Liabilities (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 31, 2012
Business Acquisition, Contingent Consideration [Line Items]    
Contingent liability, discount $ 159 $ 0