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Restructuring - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2013
Sep. 30, 2014
Sep. 30, 2014
Sep. 30, 2013
Maximum
Restructuring Cost And Reserve [Line Items]        
Reduction in global workforce, percentage 7.00%      
Severance and other costs   $ 0.3 $ 1.4  
Restructuring and impairment charges       $ 0.8