Consolidated Statements of Stockholders' Deficiency (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		$ (882,352)		$ (1,036,995)	$ (882,352)	$ (1,036,995)	$ 24,831
Net Income Net Income (Loss) Attributable to Parent	35,379	61,517	15,191	43,181	290,738	136,530	126,454
Net loss attributable to noncontrolling interests					(578)
Issuance of members' interest by subsidiary, net					2,092
Other Comprehensive Income (Loss), Net of Tax					3,951	3,581	(12,027)
Cash capital contribution from related party							20,813
Cash capital distributions to related party							(20,813)
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							(6,313)
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							(1,250,000)
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						(1,148)	44,598
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						(1,794)	36,867
Non-cash capital distribution related to tax credits utilized by related party						(2,942)	(2,586)
Non-cash capital distribution of a promissory note receivable to related party							(17,113)
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							8,343
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					20,299	17,202	7,669
Proceeds from the exercise of stock options					1,759	8,777	3,622
Treasury stock acquired from forfeitures and acquisition of restricted shares					(12,135)	(15,989)	(1,677)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							337
Excess tax benefits on share-based awards					4,975	7,484
Ending Balance	(571,251)		(882,352)		(571,251)	(882,352)	(1,036,995)
Class A [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		612		586	612	586	0
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					0
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							0
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							578
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					2	9	8
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					3	17
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	617		612		617	612	586
Class B [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		118		135	118	135	0
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					0
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							0
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							135
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					(3)	(17)
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	115		118		115	118	135
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		36,454		5,942	36,454	5,942	181,724
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					1,246
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							20,813
Cash capital distributions to related party							(20,813)
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							(6,313)
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							(250,485)
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						(1,148)	44,598
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						(1,794)	36,867
Non-cash capital distribution related to tax credits utilized by related party							(2,586)
Non-cash capital distribution of a promissory note receivable to related party							(17,113)
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							8,343
Reclassification of common stock in connection with the Distribution							(713)
Share-based compensation expense subsequent to the Distribution					20,299	17,202	7,669
Proceeds from the exercise of stock options					1,757	8,768	3,614
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							337
Excess tax benefits on share-based awards					4,975	7,484
Ending Balance	64,731		36,454		64,731	36,454	5,942
Accumulated Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(893,424)		(1,029,954)	(893,424)	(1,029,954)	(156,893)
Net Income Net Income (Loss) Attributable to Parent					290,738	136,530	126,454
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					0
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							(999,515)
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	(602,686)		(893,424)		(602,686)	(893,424)	(1,029,954)
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(17,666)		(1,677)	(17,666)	(1,677)	0
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					0
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							0
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares					(12,135)	(15,989)	(1,677)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	(29,801)		(17,666)		(29,801)	(17,666)	(1,677)
Accumulated Other Comprehensive Loss [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(8,446)		(12,027)	(8,446)	(12,027)	0
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					0
Other Comprehensive Income (Loss), Net of Tax					3,951	3,581	(12,027)
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							0
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	(4,495)		(8,446)		(4,495)	(8,446)	(12,027)
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(882,352)		(1,036,995)	(882,352)	(1,036,995)	24,831
Net Income Net Income (Loss) Attributable to Parent					290,738	136,530	126,454
Net loss attributable to noncontrolling interests					0
Issuance of members' interest by subsidiary, net					1,246
Other Comprehensive Income (Loss), Net of Tax					3,951	3,581	(12,027)
Cash capital contribution from related party							20,813
Cash capital distributions to related party							(20,813)
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							(6,313)
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							(1,250,000)
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						(1,148)	44,598
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						(1,794)	36,867
Non-cash capital distribution related to tax credits utilized by related party							(2,586)
Non-cash capital distribution of a promissory note receivable to related party							(17,113)
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							8,343
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					20,299	17,202	7,669
Proceeds from the exercise of stock options					1,759	8,777	3,622
Treasury stock acquired from forfeitures and acquisition of restricted shares					(12,135)	(15,989)	(1,677)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							337
Excess tax benefits on share-based awards					4,975	7,484
Ending Balance	(571,519)		(882,352)		(571,519)	(882,352)	(1,036,995)
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		0		0	0	0	0
Net Income Net Income (Loss) Attributable to Parent					0	0	0
Net loss attributable to noncontrolling interests					(578)
Issuance of members' interest by subsidiary, net					846
Other Comprehensive Income (Loss), Net of Tax					0	0	0
Cash capital contribution from related party							0
Cash capital distributions to related party							0
Non-cash capital distribution to related party related to employee benefit plans as a result of the Distribution (see Note 15)							0
Non-cash capital distribution associated with the issuance of debt to related party (see Note 1)							0
Non-cash capital contribution, net related to adjustments to the liability for uncertain tax positions and net deferred tax assets as a result of the Distribution						0	0
Non Cash Capital (Distribution) Contribution Related To The Utilization Of Related Party Tax Losses By Company						0	0
Non-cash capital distribution related to tax credits utilized by related party							0
Non-cash capital distribution of a promissory note receivable to related party							0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense							0
Reclassification of common stock in connection with the Distribution							0
Share-based compensation expense subsequent to the Distribution					0	0	0
Proceeds from the exercise of stock options					0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares					0	0	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures					0	0
Other noncash capital contributions (distributions), net							0
Excess tax benefits on share-based awards					0	0
Ending Balance	$ 268		$ 0		$ 268	$ 0	$ 0