Consolidated Statement of Stockholder's Equity (USD $) In Thousands, unless otherwise specified	Total	Class A [Member]	Class B [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at at Dec. 31, 2009	$ (236,992)	$ 0	$ 0	$ 0	$ (236,992)	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	80,099	0	0	0	80,099	0	0
Other comprehensive income (loss), net of tax	0
Cash capital contribution from related party	204,018	0	0	204,018	0	0	0
Cash capital distributions to related party	(53,754)	0	0	(53,754)	0	0	0
Non-cash capital contribution related to the utilization of Cablevision tax losses	52,824	0	0	52,824	0	0	0
Distribution of net assets to Cablevision (see Note 1)	(41,273)	0	0	(41,273)	0	0	0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense	20,559	0	0	20,559	0	0	0
Other noncash capital contributions (distributions), net	(650)	0	0	(650)	0	0	0
Balance at at Dec. 31, 2010	24,831	0	0	181,724	(156,893)	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	126,454	0	0	0	126,454	0	0
Other comprehensive income (loss), net of tax	(12,027)	0	0	0	0	0	(12,027)
Cash capital contribution from related party	20,813	0	0	20,813	0	0	0
Cash capital distributions to related party	(20,813)	0	0	(20,813)	0	0	0
Non-cash capital distribution to Cablevision related to employee benefit plans as a result of the Distribution (see Note 15)	(6,313)	0	0	(6,313)	0	0	0
Non-cash capital distribution associated with the issuance of debt to Cablevision (see Note 1)	(1,250,000)	0	0	(250,485)	(999,515)	0	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	44,598	0	0	44,598	0	0	0
Non-cash capital contribution related to the utilization of Cablevision tax losses	36,867	0	0	36,867	0	0	0
Non-cash capital distribution related to tax credits utilized by Cablevision	(2,586)	0	0	(2,586)	0	0	0
Non-cash capital distribution of a promissory note receivable to related party	(17,113)	0	0	(17,113)	0	0	0
Non-cash capital contribution related to the allocation of Cablevision share-based compensation expense	8,343	0	0	8,343	0	0	0
Reclassification of common stock in connection with the Distribution	0	578	135	(713)	0	0	0
Share-based compensation expense subsequent to the Distribution	7,669	0	0	7,669	0	0	0
Proceeds from the exercise of stock options	3,622	8	0	3,614	0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares	(1,677)	0	0	0	0	(1,677)	0
Other noncash capital contributions (distributions), net	337	0	0	337	0	0	0
Balance at at Dec. 31, 2011	(1,036,995)	586	135	5,942	(1,029,954)	(1,677)	(12,027)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	136,530	0	0	0	136,530	0	0
Other comprehensive income (loss), net of tax	3,581	0	0	0	0	0	3,581
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)	0	0	(1,148)	0	0	0
Non-cash capital contribution related to the utilization of Cablevision tax losses	(1,794)	0	0	(1,794)	0	0	0
Non-cash capital distribution related to tax credits utilized by Cablevision	(2,942)
Share-based compensation expense subsequent to the Distribution	17,202	0	0	17,202	0	0	0
Proceeds from the exercise of stock options	8,777	9	0	8,768	0	0	0
Treasury stock acquired from forfeitures and acquisition of restricted shares	(15,989)	0	0	0	0	(15,989)	0
Conversion of Class B to Class A common stock	0	17	(17)	0	0	0	0
Excess tax benefits on share-based awards	7,484	0	0	7,484	0	0	0
Balance at at Dec. 31, 2012	$ (882,352)	$ 612	$ 118	$ 36,454	$ (893,424)	$ (17,666)	$ (8,446)