SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, CSC Holdings Membership Interests (Details) - CSC Holdings, LLC - shares	Dec. 31, 2015	Dec. 31, 2014
CSC Holdings Membership Interests [Abstract]
Membership units issued (in shares)	17,631,479	17,631,479
Membership units outstanding (in shares)	17,631,479	17,631,479