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BENEFIT PLANS, Benefit Payments and Defined Contribution Benefit Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Contribution Benefit Plans [Abstract]      
Cost associated with defined contribution benefit plans $ 61,343 $ 65,725 $ 26,757
Cablevision Defined Benefit Plans      
Projected Future Benefit Payments for Qualified and Non-Qualified Defined Benefit Plans [Abstract]      
2016 40,666    
2017 31,132    
2018 29,219    
2019 28,374    
2020 28,942    
2021-2025 124,043    
Pension Plan      
Projected Future Benefit Payments for Qualified and Non-Qualified Defined Benefit Plans [Abstract]      
Expected company contribution in next fiscal year $ 9,000