DEBT, Newsday LLC Credit Facility (Details) - Newsday Holdings LLC - Floating Term Rate Loan Facility - USD ($)			12 Months Ended
	Dec. 10, 2013	Oct. 12, 2012	Dec. 31, 2015
Credit facility debt [Abstract]
Maximum credit borrowing capacity		$ 480,000,000
Repayment on credit facility	$ 160,000,000
Senior notes due to Newsday		$ 611,455,000
Cablevision senior notes purchased by CSC Holdings and cancelled by Cablevision	$ 142,262,000
Minimum liquidity			$ 25,000,000
Base Rate
Credit facility debt [Abstract]
Basis spread on variable rate (in hundredths)		2.50%
Eurodollar Rate
Credit facility debt [Abstract]
Basis spread on variable rate (in hundredths)		3.50%