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Acquisitions - Additional Information (Detail) (Amba, USD $)
In Millions, unless otherwise specified
0 Months Ended
Dec. 11, 2013
Mar. 31, 2014
Amba
   
Business Acquisition [Line Items]    
Acquired cash $ 16.0  
Additional direct equity investment   100.00%
Acquired receivables gross contractual amount $ 6.0