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DIVIDENDS (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
May. 01, 2015
Feb. 24, 2015
Jun. 30, 2015
Jun. 30, 2014
Dividends [Abstract]        
Dividends paid by Cablevision     $ 84,669 $ 80,630
Maximum dividends to be paid when, and if, restrictions lapse on restricted shares outstanding     6,828  
CSC Holdings, LLC        
Dividends [Abstract]        
Distributions paid to Cablevision     214,135  
Restricted Stock        
Dividends [Abstract]        
Dividends paid by Cablevision     $ 3,935  
CNYG Class A Common Stock | Dividend Declared 2015 Q1        
Dividends [Abstract]        
Dividend, declaration date   Feb. 24, 2015    
Dividend per share (in dollars per share)   $ 0.15    
Dividend, record date   Mar. 16, 2015    
Dividend, payment date   Apr. 03, 2015    
CNYG Class A Common Stock | Dividend Declared 2015 Q2        
Dividends [Abstract]        
Dividend, declaration date May 01, 2015      
Dividend per share (in dollars per share) $ 0.15      
Dividend, record date May 22, 2015      
Dividend, payment date Jun. 12, 2015      
CNYG Class B Common Stock | Dividend Declared 2015 Q1        
Dividends [Abstract]        
Dividend, declaration date   Feb. 24, 2015    
Dividend per share (in dollars per share)   $ 0.15    
Dividend, record date   Mar. 16, 2015    
Dividend, payment date   Apr. 03, 2015    
CNYG Class B Common Stock | Dividend Declared 2015 Q2        
Dividends [Abstract]        
Dividend, declaration date May 01, 2015      
Dividend per share (in dollars per share) $ 0.15      
Dividend, record date May 22, 2015      
Dividend, payment date Jun. 12, 2015