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Acquisitions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended
Jan. 25, 2013
Softel Limited [Member]
Dec. 10, 2012
PPC Broadband Inc [Member]
Sep. 29, 2013
PPC Broadband Inc [Member]
Jul. 31, 2012
Miranda Technologies Inc [Member]
Business Acquisition [Line Items]        
Amount paid for additional shares acquired $ 9.1 $ 522.4   $ 374.7
Percentage of outstanding shares acquired   100.00%    
Fair value of acquired receivables     27.0  
Acquired receivable, gross contractual amount     27.7  
Amount of acquired receivables not expected to be collected     0.7  
Goodwill acquired     $ 277.3