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Strategic Partnering Arrangement - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 03, 2017
Mar. 31, 2017
Mar. 31, 2016
Business Acquisition [Line Items]      
Payment related to acquisition of business, net of cash acquired   $ 140,378 $ 1,258
Euro Retail Co [Member] | Eutelsat [Member]      
Business Acquisition [Line Items]      
Ownership percentage of issued shares of an entity 49.00%    
Euro Infrastructure Co [Member]      
Business Acquisition [Line Items]      
Ownership percentage of issued shares of an entity 49.00% 49.00%  
Payments, net of transaction costs, to acquire the issued shares in investment $ 139,500    
Payment related to acquisition of business, net of cash acquired 141,900    
Transaction costs $ 2,400