PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 1,475,251	$ 1,508,125	$ 1,588,764
Plant | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Plant | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	25 years
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
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
Acquisition and development of internal use software
Property, Plant and Equipment [Line Items]
Property, plant and equipment capitalized	$ 132,966	$ 134,265	$ 151,646