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Acquisitions - Additional Information (Detail)
€ in Millions, shares in Millions, $ in Millions
9 Months Ended
Dec. 31, 2020
Dec. 20, 2020
USD ($)
shares
Nov. 18, 2020
EUR (€)
Dec. 31, 2020
EUR (€)
Sep. 30, 2020
USD ($)
RigNet, Inc [Member]          
Business Acquisition [Line Items]          
Assumed debt on business combination in principal amount | $         $ 92.2
Euro​ Infrastructure​ Co Step Acquisition [Member] | Euro Infrastructure Co [Member]          
Business Acquisition [Line Items]          
Percentage of additional interest in subsidiary acquired     51.00%    
Payments, net of transaction costs, to acquire the issued shares in investment     € 140.0    
Payments to acquire additional interest in subsidiary, after consideration       € 50.0  
Euro Infrastructure Co.’s cash on hand       € 90.0  
RigNet, Inc [Member]          
Business Acquisition [Line Items]          
Date of acquisition   Dec. 20, 2020      
Total consideration | $   $ 221.8      
RigNet, Inc [Member] | Common Stock [Member]          
Business Acquisition [Line Items]          
Business combination, share conversion ratio   0.1845      
Shares issuable for consideration payable in shares | shares   4.0      
Percentage of outstanding common stock compromised 5.50%