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Property and Equipment (Schedule of Capital Leased Assets) (Details) - Satellite Equipment [Member] - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Satellite equipment $ 46,368 $ 46,315
Less accumulated amortization (26,808) (22,783)
Satellite equipment, net $ 19,560 $ 23,532