PROPERTY, PLANT AND EQUIPMENT - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,030,322	$ 9,873,552
Less accumulated depreciation and amortization	(5,276,921)	(4,044,671)
Property, plant and equipment, net	5,753,401	5,828,881
Customer premise equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,563,729	$ 1,354,510
Customer premise equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Customer premise equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Headends and related equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,023,684	$ 1,852,105
Headends and related equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years	5 years
Headends and related equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	25 years	25 years
Infrastructure
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,314,322	$ 4,595,143
Infrastructure | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Infrastructure | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		25 years
Equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,111,577	$ 1,083,166
Equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		10 years
Construction in progress (including materials and supplies)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	192,571	$ 215,684
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	63,478	$ 57,448
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		8 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	151,627	$ 146,387
Transportation equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		10 years
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	457,174	$ 411,573
Buildings and building improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		10 years
Buildings and building improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		40 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	103,734	$ 109,110
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 48,426	$ 48,426