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Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)
In Millions, unless otherwise specified
0 Months Ended
Jul. 31, 2014
BLACKIRON Data [Member]
 
Subsequent Event [Line Items]  
Escrow proceeds received $ 19.5
North America Telecom [Member]
 
Subsequent Event [Line Items]  
Escrow proceeds received $ 3.0