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Restructuring - Schedule of Restructuring Charges and Cash Payments (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]    
Accrued restructuring balance $ 199 $ 974
Charges to operations 13 128
Cash payments (136) (524)
Accrued restructuring balance 76 578
Severance Pay and Benefits [Member]
   
Restructuring Cost and Reserve [Line Items]    
Accrued restructuring balance 199 680
Charges to operations 13 167
Cash payments (136) (269)
Accrued restructuring balance 76 578
Facility Exit Costs [Member]
   
Restructuring Cost and Reserve [Line Items]    
Accrued restructuring balance   294
Charges to operations   (39)
Cash payments   (255)
Accrued restructuring balance