AFFILIATE AND RELATED PARTY TRANSACTIONS - Revenue and Related Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Revenue	$ 13,238	$ 14,729	$ 3,974
Operating expenses:
Programming and other direct costs	(17,167)	(13,346)	(11,580)
Other operating expenses, net	(11,989)	(11,869)	(8,355)
Operating expenses, net	(29,156)	(25,215)	(19,935)
Net charges	(15,918)	(10,486)	(15,961)
Capital Expenditures	$ 54,163	$ 17,216	$ 12,167
Shares repurchased (in shares)	23,593,728	161,216,653	72,668,712
Value of shares repurchased	$ 804,928	$ 4,816,895	$ 1,686,873
Altice Management Americas | Affiliates
Operating expenses:
Shares repurchased (in shares)	3,582,525
Value of shares repurchased	$ 84,906