Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			32 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Feb. 01, 2018
Indefinite-lived Intangible Assets [Line Items]
Amortization expense	$ 24,600	$ 27,500	$ 34,900
Waived management fees, included in affiliate contract expanse accumulated amortization	37,800	36,100	$ 24,600	$ 98,400
Unfavorable leases, wireless segment	301,554	316,504		301,554	$ 52,000
Net carrying value, intangible assets	301,554	$ 316,504		301,554	52,000
Additional waived management fee under Affiliate Agreement	157,200
Unfavorable lease liability, classified as rent expense	21,094			21,094
Off-market leases - unfavorable
Indefinite-lived Intangible Assets [Line Items]
Unfavorable leases, wireless segment					3,310
Net carrying value, intangible assets					$ 3,310
Unfavorable lease liability, classified as rent expense	$ 5,100			$ 5,100