Segment Information (Summary Of Continuing Operations By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Advertising	$ 147,243	$ 129,538	$ 311,203	$ 258,775
Distribution	232,079	198,032	450,080	395,034
Consolidated revenues, net	379,322	327,570	761,283	653,809
Adjusted operating cash flow (deficit)	138,292	127,244	288,458	252,914
Depreciation and amortization	(18,308)	(24,067)	(36,653)	(49,118)
Share-based compensation expense	(5,604)	(4,901)	(9,941)	(8,484)
Gain Related to Litigation Settlement	132,944	0	132,944	0
Restructuring credit	0	0	0	3
Operating income (loss)	247,324	98,276	374,808	195,315
Capital Expenditures			13,670	6,619
National Networks [Member]
Segment Reporting Information [Line Items]
Advertising	147,243	129,528	311,203	258,765
Distribution	206,325	175,656	401,831	350,642
Consolidated revenues, net	353,568	305,184	713,034	609,407
Adjusted operating cash flow (deficit)	146,225	135,623	305,328	268,995
Depreciation and amortization	(14,153)	(20,527)	(28,374)	(41,832)
Share-based compensation expense	(4,503)	(3,799)	(7,951)	(6,648)
Gain Related to Litigation Settlement	0		0
Restructuring credit				0
Operating income (loss)	127,569	111,297	269,003	220,515
Capital Expenditures			2,830	860
International And Other [Member]
Segment Reporting Information [Line Items]
Advertising	0	10	0	10
Distribution	29,919	26,259	56,212	52,605
Consolidated revenues, net	29,919	26,269	56,212	52,615
Adjusted operating cash flow (deficit)	(8,838)	(9,414)	(18,739)	(17,621)
Depreciation and amortization	(4,155)	(3,540)	(8,279)	(7,286)
Share-based compensation expense	(1,101)	(1,102)	(1,990)	(1,836)
Gain Related to Litigation Settlement	132,944		132,944
Restructuring credit				3
Operating income (loss)	118,850	(14,056)	103,936	(26,740)
Capital Expenditures			10,840	5,759
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Advertising	0	0	0	0
Distribution	(4,165)	(3,883)	(7,963)	(8,213)
Consolidated revenues, net	(4,165)	(3,883)	(7,963)	(8,213)
Adjusted operating cash flow (deficit)	905	1,035	1,869	1,540
Depreciation and amortization	0	0	0	0
Share-based compensation expense	0	0	0	0
Gain Related to Litigation Settlement	0		0
Restructuring credit				0
Operating income (loss)	905	1,035	1,869	1,540
Capital Expenditures			0	0
Intersegment Eliminations [Member] | National Networks [Member]
Segment Reporting Information [Line Items]
Consolidated revenues, net	(61)	(201)	(184)	(504)
Intersegment Eliminations [Member] | International And Other [Member]
Segment Reporting Information [Line Items]
Consolidated revenues, net	$ (4,104)	$ (3,682)	$ (7,779)	$ (7,709)