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Fair Value Measurements - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Fair Value, Inputs, Level 3
Sep. 30, 2012
Minimum
Sep. 30, 2012
Maximum
Fair Value Measurements [Line Items]        
Recognized adjustment earnings $ 356      
Fair value assumption, discount rate 3.30%      
Fair value assumption, period     2 years 3 years
Deal related compensation expense and accretion charges 140      
Adjustment to liabilities   $ 135