SCHEDULE II, VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Roll Forward]
Balance at Beginning of Period	$ 14,614	$ 13,521	$ 14,275
Provision for Bad Debt	47,611	55,231	49,002
Deductions/ Write-Offs and Other Charges	(50,113)	(54,138)	(49,756)
Balance at End of Period	12,112	14,614	13,521
CSC Holdings, LLC
Allowance for Doubtful Accounts [Roll Forward]
Balance at Beginning of Period	14,614	13,521	14,275
Provision for Bad Debt	47,611	55,231	49,002
Deductions/ Write-Offs and Other Charges	(50,113)	(54,138)	(49,756)
Balance at End of Period	$ 12,112	$ 14,614	$ 13,521