SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Continuing Operations:
Capital lease obligations	$ 990us-gaap_CapitalLeaseObligationsIncurred	$ 14,100us-gaap_CapitalLeaseObligationsIncurred
Property and equipment accrued but unpaid	26,785	41,236
Notes payable to vendor	0us-gaap_NotesIssued1	34,318us-gaap_NotesIssued1
Intangible asset obligations	302	54
Supplemental Data [Abstract]
Cash interest paid - continuing operations	143,446us-gaap_InterestPaid	150,436us-gaap_InterestPaid
Income taxes refunded, net - continuing operations	(382)us-gaap_IncomeTaxesPaidNet	(719)us-gaap_IncomeTaxesPaidNet
CNYG Class A and CNYG Class B Shares
Non-Cash Investing and Financing Activities of Cablevision:
Dividends payable on CNYG Class A and CNYG Class B shares	40,344	39,502
Restricted Stock
Non-Cash Investing and Financing Activities of Cablevision:
Dividends payable on unvested restricted share awards	1,079	938
CSC Holdings, LLC
Continuing Operations:
Capital lease obligations	990	14,100
Property and equipment accrued but unpaid	26,785	41,236
Notes payable to vendor	0	34,318
Intangible asset obligations	302	54
Supplemental Data [Abstract]
Cash interest paid - continuing operations	85,564	91,682
Income taxes refunded, net - continuing operations	$ (382)	$ (719)

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Dividends Payable on Class A and Class B Shares

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The increase during the period in capital lease obligations due to entering into new capital leases.

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