Regulatory Authorizations - Schedule of regulatory authorizations with finite and indefinite useful lives (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cost
Weighted average useful life		13 years
Additions	$ 7,900
Accumulated Amortization
Amortization expense		$ (3,672)	$ (5,190)	$ (5,097)
Total
Balance at the beginning of the period		44,231
Balance at the end of the period		29,507	44,231
Indefinite lived
Balance at the beginning of the period		400,042	400,042	406,042
Additions		39,491
Impairment			0	(6,000)
Currency Translation Adjustment		758	0	0
Balance at the end of the period		440,291	400,042	400,042
Total
Balance at the beginning of the period		430,039	471,321	479,018
Additions		52,324
Impairment			(29,628)	(6,000)
Currency Translation Adjustment		(93)	(6,464)	3,400
Balance at the end of the period		478,598	430,039	471,321
Regulatory authorization
Cost
Balance at the beginning of the period		46,787	92,621	87,959
Additions		12,833
Impairment			(37,476)	0
Currency Translation Adjustment		(1,169)	(8,358)	4,662
Balance at the end of the period		58,451	46,787	92,621
Accumulated Amortization
Balance at the beginning of the period		(16,790)	(21,342)	(14,983)
Impairment			7,848	0
Amortization expense		(3,672)	(5,190)	(5,097)
Currency Translation Adjustment		318	1,894	(1,262)
Balance at the end of the period		(20,144)	(16,790)	(21,342)
Total
Balance at the beginning of the period		29,997	71,279	72,976
Impairment			(29,628)	0
Additions		12,833
Currency Translation Adjustment		(851)	(6,464)	3,400
Balance at the end of the period		$ 38,307	$ 29,997	$ 71,279