EQUITY AND LONG-TERM INCENTIVE PLANS, Long-term Incentive Plans (Details) - Cablevision Systems Corporation Cash Incentive Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Long-Term Incentive Plans [Abstract]
Long-term incentive awards compensation expense	$ 27,170	$ 43,892	$ 24,596
Accrued long-term performance-based awards for which performance criteria has not yet been met	$ 31,225