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Satellite Network and Other Equipment, Net - Summary of Satellite Network and Other Equipment, Net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross $ 334,876 $ 334,833
Less: accumulated depreciation and amortization (218,622) (207,296)
Satellite network and other equipment, net 116,254 127,537
Land [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross 381 381
Satellite Network [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross 187,877 200,279
Capitalized Software [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross 101,793 96,261
Computer Hardware [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross 7,697 7,351
Other [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross 21,104 17,816
Assets under Construction [Member]    
Property Plant And Equipment [Line Items]    
Satellite network and other equipment, gross $ 16,024 $ 12,745