Description of Business and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 449,384	$ 27,264
Accumulated Amortization	(59,283)	(24,369)
Net	390,101	2,895
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Gross Carrying Amount	64,431	64,098
Total intangibles, gross carrying amount	513,815	91,362
Total intangibles	454,532	66,993
Cable Franchise Rights [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Gross Carrying Amount	64,334	64,059
Railroad Crossing Rights [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Gross Carrying Amount	97	39
Business Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	284,102	0
Accumulated Amortization	(14,030)	0
Net	270,072	0
Acquired subscribers wireless [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	120,855	0
Accumulated Amortization	(18,738)	0
Net	102,117	0
Favorable leases - wireless [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,950	0
Accumulated Amortization	(1,130)	0
Net	15,820	0
Acquired subscribers cable [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,265	25,326
Accumulated Amortization	(24,631)	(23,805)
Net	634	1,521
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,212	1,938
Accumulated Amortization	(754)	(564)
Net	$ 1,458	$ 1,374