Revenue Recognition and Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Contract Assets and Liabilities [Line Items]
Revenues	$ 2,450,256	$ 2,396,567
Contract assets	29,981		$ 30,758
Deferred revenue	$ 176,881		$ 182,034
Customer Contracts | Minimum
Contract Assets and Liabilities [Line Items]
Finite-lived intangible asset, useful life	3 years
Customer Contracts | Maximum
Contract Assets and Liabilities [Line Items]
Finite-lived intangible asset, useful life	5 years
Broadband [Member]
Contract Assets and Liabilities [Line Items]
Revenues	$ 885,529	775,573
Pay TV [Member]
Contract Assets and Liabilities [Line Items]
Revenues	947,061	1,017,330
Telephony [Member]
Contract Assets and Liabilities [Line Items]
Revenues	125,030	154,464
Business Services and Wholesale [Member]
Contract Assets and Liabilities [Line Items]
Revenues	364,530	350,689
Advertising and News [Member]
Contract Assets and Liabilities [Line Items]
Revenues	105,540	94,738
Mobile [Member]
Contract Assets and Liabilities [Line Items]
Revenues	18,356	0
Products And Services, Other [Member]
Contract Assets and Liabilities [Line Items]
Revenues	4,210	3,773
Franchise [Member]
Contract Assets and Liabilities [Line Items]
Franchise fees and other taxes and fees	$ 64,910	$ 64,236