CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 884,422	$ 850,413
Accounts receivable, trade (less allowance for doubtful accounts of $11,224 and $12,112)	249,852	277,526
Prepaid expenses and other current assets	159,306	140,094
Amounts due from affiliates	1,084	1,732
Deferred tax asset	41,628	37,943
Investment securities pledged as collateral	452,134	622,958
Total current assets	1,788,426	1,930,666
Property, plant and equipment, net of accumulated depreciation of $9,543,360 and $9,454,315	2,954,073	3,025,747
Investment securities pledged as collateral	760,707	622,958
Derivative contracts	25,497	7,317
Other assets	38,675	44,505
Amortizable intangible assets, net of accumulated amortization of $61,438 and $60,018	41,083	36,781
Indefinite-lived cable television franchises	731,848	731,848
Trademarks and other indefinite-lived intangible assets	7,250	7,250
Goodwill	264,690	264,690
Deferred financing costs, net of accumulated amortization	88,954	93,409
Total assets	6,701,203	6,765,171
Current Liabilities:
Accounts payable	419,996	431,761
Accrued liabilities	534,588	584,446
Amounts due to affiliates	31,120	29,651
Deferred revenue	54,993	52,932
Liabilities under derivative contracts	53,249	93,010
Credit facility debt	259,813	61,849
Collateralized indebtedness	353,465	466,335
Capital lease obligations	17,407	17,216
Notes payable	12,978	12,968
Total current liabilities	1,737,609	1,750,168
Deferred revenue	4,509	4,701
Liabilities under derivative contracts	5,093	9,207
Other liabilities	249,700	287,367
Deferred tax liability	651,174	611,088
Credit facility debt	2,505,617	2,718,800
Collateralized indebtedness	679,575	519,848
Capital lease obligations	25,500	29,196
Notes payable	8,004	10,943
Senior notes and debentures	5,857,019	5,855,867
Total liabilities	11,723,800	11,797,185
Commitments and contingencies
Redeemable noncontrolling interests	8,830	8,676
Stockholders' Deficiency:
Preferred Stock, $.01 par value, 50,000,000 shares authorized, none issued	0	0
Paid-in capital	796,268	823,103
Accumulated deficit	(4,190,227)	(4,234,860)
Total stockholders' deficiency/member's deficiency before treasury stock, accumulated other comprehensive loss and noncontrolling interest	(3,390,390)	(3,408,213)
Treasury stock, at cost (81,260,947 and 80,122,914 CNYG Class A common shares)	(1,609,124)	(1,591,021)
Accumulated other comprehensive loss	(32,248)	(42,235)
Total stockholders' deficiency	(5,031,762)	(5,041,469)
Noncontrolling interest	335	779
Total deficiency	(5,031,427)	(5,040,690)
Total liabilities and stockholders' deficiency	6,701,203	6,765,171
CNYG Class A Common Stock
Stockholders' Deficiency:
Common stock	3,028	3,003
CNYG Class B Common Stock
Stockholders' Deficiency:
Common stock	541	541
RMG Class A Common Stock
Stockholders' Deficiency:
Common stock	0	0
RMG Class B Common Stock
Stockholders' Deficiency:
Common stock	0	0
CSC Holdings, LLC
Current Assets:
Cash and cash equivalents	862,910	813,396
Accounts receivable, trade (less allowance for doubtful accounts of $11,224 and $12,112)	249,852	277,526
Prepaid expenses and other current assets	153,770	131,891
Amounts due from affiliates	1,055	1,694
Investment securities pledged as collateral	452,134	622,958
Total current assets	1,719,721	1,847,465
Property, plant and equipment, net of accumulated depreciation of $9,543,360 and $9,454,315	2,954,073	3,025,747
Investment securities pledged as collateral	760,707	622,958
Derivative contracts	25,497	7,317
Other assets	38,675	44,505
Amortizable intangible assets, net of accumulated amortization of $61,438 and $60,018	41,083	36,781
Indefinite-lived cable television franchises	731,848	731,848
Trademarks and other indefinite-lived intangible assets	7,250	7,250
Goodwill	264,690	264,690
Deferred financing costs, net of accumulated amortization	56,735	59,470
Total assets	6,600,279	6,648,031
Current Liabilities:
Accounts payable	419,996	431,761
Accrued liabilities	440,705	525,774
Amounts due to affiliates	172,051	135,636
Deferred tax liability	78,618	105,285
Deferred revenue	54,993	52,932
Liabilities under derivative contracts	53,249	93,010
Credit facility debt	259,813	61,849
Collateralized indebtedness	353,465	466,335
Capital lease obligations	17,407	17,216
Notes payable	12,978	12,968
Total current liabilities	1,863,275	1,902,766
Deferred revenue	4,509	4,701
Liabilities under derivative contracts	5,093	9,207
Other liabilities	247,256	282,920
Deferred tax liability	667,946	626,367
Credit facility debt	2,505,617	2,718,800
Collateralized indebtedness	679,575	519,848
Capital lease obligations	25,500	29,196
Notes payable	8,004	10,943
Senior notes and debentures	3,062,844	3,062,126
Total liabilities	9,069,619	9,166,874
Commitments and contingencies
Redeemable noncontrolling interests	8,830	8,676
Stockholders' Deficiency:
Accumulated deficit	(1,941,397)	(2,024,065)
Senior notes due from Cablevision	(611,455)	(611,455)
Other member's equity (17,631,479 membership units issued and outstanding)	106,595	149,457
Total stockholders' deficiency/member's deficiency before treasury stock, accumulated other comprehensive loss and noncontrolling interest	(2,446,257)	(2,486,063)
Accumulated other comprehensive loss	(32,248)	(42,235)
Total stockholders' deficiency	(2,478,505)	(2,528,298)
Noncontrolling interest	335	779
Total deficiency	(2,478,170)	(2,527,519)
Total liabilities and stockholders' deficiency	$ 6,600,279	$ 6,648,031