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Contingent Liabilities Re-measured (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Mar. 31, 2013
Business Acquisition, Contingent Consideration [Line Items]    
Contingent liabilities $ 238 $ 841
Contingent Liability
   
Business Acquisition, Contingent Consideration [Line Items]    
Contingent liabilities 238 841
Fair Value, Inputs, Level 3 | Contingent Liability
   
Business Acquisition, Contingent Consideration [Line Items]    
Contingent liabilities $ 238 $ 841