FAIR VALUE MEASUREMENT (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents for each of these hierarchy levels, the Company's financial assets and financial liabilities that are measured at fair value on a recurring basis at June 30, 2015 and December 31, 2014:

	At June 30, 2015
	Level I		Level II		Level III		Total
Assets:
Money market funds	$	706,792	$	—	$	—	$	706,792
Investment securities	132		—		—		132
Investment securities pledged as collateral	1,291,664		—		—		1,291,664
Prepaid forward contracts	—		30,814		—		30,814
Liabilities:
Prepaid forward contracts	—		36,495		—		36,495

	At December 31, 2014
	Level I		Level II		Level III		Total
Assets:
Money market funds	$	736,330	$	—	$	—	$	736,330
Investment securities	132		—		—		132
Investment securities pledged as collateral	1,245,916		—		—		1,245,916
Prepaid forward contracts	—		7,317		—		7,317
Liabilities:
Prepaid forward contracts	—		102,217		—		102,217

Carrying Amounts, Estimated Fair Values and Classification Under the Fair Value Hierarchy of Financial Instruments, Excluding Those Carried at Fair Value

The carrying values, estimated fair values, and classification under the fair value hierarchy of the Company's financial instruments, excluding those that are carried at fair value in the accompanying condensed consolidated balance sheets, are summarized as follows:

		June 30, 2015
	Fair Value Hierarchy	Carrying Amount		Estimated Fair Value
CSC Holdings notes receivable:
Cablevision senior notes held by Newsday Holdings LLC (a)	Level II	$	611,455	$	661,702
Debt instruments:
Credit facility debt (b)	Level II	$	2,551,429	$	2,555,560
Collateralized indebtedness	Level II	1,127,541		1,111,901
Senior notes and debentures	Level II	3,063,578		3,249,629
Notes payable	Level II	23,818		23,704
CSC Holdings total debt instruments		6,766,366		6,940,794
Cablevision senior notes	Level II	2,794,626		2,963,053
Cablevision total debt instruments		$	9,560,992	$	9,903,847

		December 31, 2014
	Fair Value Hierarchy	Carrying Amount		Estimated Fair Value
CSC Holdings notes receivable:
Cablevision senior notes held by Newsday Holdings LLC (a)	Level II	$	611,455	$	680,587
Debt instruments:
Credit facility debt (b)	Level II	$	2,780,649	$	2,785,975
Collateralized indebtedness	Level II	986,183		957,803
Senior notes and debentures	Level II	3,062,126		3,368,875
Notes payable	Level II	23,911		23,682
CSC Holdings total debt instruments		6,852,869		7,136,335
Cablevision senior notes	Level II	2,793,741		3,048,387
Cablevision total debt instruments		$	9,646,610	$	10,184,722

(a) These notes are eliminated at the consolidated Cablevision level.

(b) The principal amount of the Company's credit facility debt, which bears interest at variable rates, approximates its fair value.