DEBT, Issuance of Debt Securities (Details) - USD ($)	1 Months Ended			12 Months Ended
	Apr. 30, 2015	Sep. 30, 2014	May. 31, 2014	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Issuance of Debt Securities [Abstract]
Repayments of credit facility debt				$ 260,321,000		$ 990,785,000	$ 3,445,751,000
CSC Holdings, LLC
Issuance of Debt Securities [Abstract]
Repayments of credit facility debt				260,321,000		$ 990,785,000	$ 3,445,751,000
Restricted Group | Term B Loan Facility
Issuance of Debt Securities [Abstract]
Repayments of credit facility debt	$ 200,000,000	$ 200,000,000	$ 750,000,000
Senior Notes | CSC Holdings, LLC | Senior 5.25% Notes due June 1, 2024
Issuance of Debt Securities [Abstract]
Issue amount			$ 750,000,000	$ 750,000,000	[1]
Interest rate (percent)			5.25%	5.25%	[1]
Redemption price, percentage of face value (in hundredths)			100.00%
Deferred financing costs incurred			$ 14,273,000

[1] The Company may redeem some or all of the notes at any time at a specified "make-whole" price plus accrued and unpaid interest to the redemption date.