Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	$ 78,314		$ 64,475
Gross carrying amount	488,492		496,776
Accumulated amortization and other	(252,659)		(195,222)
Total	235,833		301,554
Total intangible assets, gross carrying amount	566,806		561,251
Intangible assets, net	314,147	$ 352,201	366,029
Affiliate contract expansion
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	455,305		455,305
Accumulated amortization and other	(226,712)		(167,830)
Total	228,593		287,475
FCC Spectrum Licenses
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4,659		0
Accumulated amortization and other	(97)		0
Total	4,562		0
Favorable leases - Wireless
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0		15,743
Accumulated amortization and other	0		(1,919)
Total	0		13,824
Acquired subscribers - Cable
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	28,065		25,265
Accumulated amortization and other	(25,600)		(25,250)
Total	2,465		15
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	463		463
Accumulated amortization and other	(250)		(223)
Total	213		240
Cable franchise rights
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	64,334		64,334
FCC Spectrum Licenses
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	13,839		0
Railroad crossing rights
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	$ 141		$ 141