Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended				20 Months Ended
	Dec. 31, 2017	May 06, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Amortization expense	$ 27,400		$ 34,900	$ 1,400
Waived management fees, included in affiliate contract expanse accumulated amortization	194,900	$ 255,600			$ 60,700
Unfavorable leases, wireless segment	316,504		390,101		316,504
Net carrying value, intangible assets	316,504		390,101		316,504
Unfavorable lease liability, classified as rent expense	21,700				21,700
Unfavorable Leases Wireless [Member]
Indefinite-lived Intangible Assets [Line Items]
Unfavorable leases, wireless segment	3,200				3,200
Net carrying value, intangible assets	3,200				3,200
Unfavorable lease liability, classified as rent expense	$ 3,200				$ 3,200
Acquired Subscribers [Member]
Indefinite-lived Intangible Assets [Line Items]
Unfavorable leases, wireless segment			102,000
Net carrying value, intangible assets			$ 102,000