SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Continuing Operations:
Property and equipment accrued but unpaid	$ 51,094	$ 36,852
Notes payable to vendor	8,318	34,522
Capital lease obligations	19,987	25,412
Intangible asset obligations	760	216
Supplemental Data [Abstract]
Cash interest paid - continuing operations	423,273	414,412
Income taxes paid, net - continuing operations	711	8,417
Restricted Stock
Non-Cash Investing and Financing Activities of Cablevision:
Dividends payable on unvested restricted share awards	3,635	2,794
CSC Holdings, LLC
Continuing Operations:
Property and equipment accrued but unpaid	51,094	36,852
Notes payable to vendor	8,318	34,522
Capital lease obligations	19,987	25,412
Intangible asset obligations	760	216
Supplemental Data [Abstract]
Cash interest paid - continuing operations	258,439	248,444
Income taxes paid, net - continuing operations	$ 711	$ 8,417