Goodwill, Regulatory Authorizations and Other Intangible Assets (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Accumulated amortization
Balance at the beginning of the period	$ (302,345)
Balance at the end of the period	(309,690)
Net
Balance at the beginning of the period	58,955
Balance at the end of the period	51,593
Total regulatory authorizations, net
Balance at the beginning of the period	536,936
Additions	(2,671)
Currency Translation Adjustment	(5,919)
Balance at the end of the period	528,346
Indefinite Lives
Indefinite lives
Balance at the beginning of the period	465,657
Balance at the end of the period	465,657
Finite Lived Regulatory Authorizations [Member]
Cost
Balance at the beginning of the period	92,621
Currency Translation Adjustment	(7,510)
Balance at the end of the period	85,111
Accumulated amortization
Balance at the beginning of the period	(21,342)
Additions	(2,671)
Currency Translation Adjustment	1,591
Balance at the end of the period	(22,422)
Net
Balance at the beginning of the period	71,279
Additions	(2,671)
Currency Translation Adjustment	(5,919)
Balance at the end of the period	$ 62,689