Regulatory Authorizations - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Nov. 30, 2019	Oct. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Additions	$ 7,900
Amortization period	11 years
Additions	$ 4,500
Impairment of long-lived assets			$ 0	$ 65,220	$ 10,762
Impairment of long-lived assets, regulatory authorization				29,600
Impairment of long-lived assets, other				3,500
Impairment of long-lived assets, foreign currency translation adjustment				32,100
Indefinite-lived intangible assets acquired		$ 39,500
Payments to acquire intangible assets		$ 26,500	34,447	0	0
Indefinite-lived intangible assets			$ 440,291	$ 400,042	400,042	$ 406,042
Contractual Rights
Finite-Lived Intangible Assets [Line Items]
Impairment of long-lived assets					$ 6,000
Indefinite-lived intangible assets						$ 6,000
Licensing Agreements
Finite-Lived Intangible Assets [Line Items]
Amortization period	15 years