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Fair Value Measurements - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Minimum
Dec. 31, 2012
Maximum
Dec. 31, 2012
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Recognized adjustment earnings $ 400        
Fair value assumption, discount rate 3.30%        
Fair value assumption, period     2 years 3 years  
Deal related compensation expense and accretion charges 205 0      
Adjustment to liabilities         $ 270