Segment Information (Summary Of Continuing Operations By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Advertising	$ 146,467	$ 107,458	$ 457,670	$ 366,233
Distribution	248,861	224,598	698,941	619,632
Consolidated revenues, net	395,328	332,056	1,156,611	985,865
Adjusted operating cash flow (deficit)	137,430	109,589	425,888	362,503
Depreciation and amortization	(9,935)	(18,368)	(46,588)	(67,486)
Share-based compensation expense	(5,108)	(4,362)	(15,049)	(12,846)
Gain Related to Litigation Settlement	0	0	132,944	0
Restructuring credit	0	0	0	3
Operating income (loss)	122,387	86,859	497,195	282,174
Capital Expenditures			18,336	13,673
Operating Segments [Member] | National Networks [Member]
Segment Reporting Information [Line Items]
Advertising	146,467	107,453	457,670	366,218
Distribution	221,473	198,775	623,304	549,417
Consolidated revenues, net	367,940	306,228	1,080,974	915,635
Adjusted operating cash flow (deficit)	144,943	116,440	450,271	385,435
Depreciation and amortization	(5,597)	(14,449)	(33,971)	(56,281)
Share-based compensation expense	(4,076)	(3,463)	(12,027)	(10,111)
Gain Related to Litigation Settlement			0
Restructuring credit				0
Operating income (loss)	135,270	98,528	404,273	319,043
Capital Expenditures			3,917	4,271
Operating Segments [Member] | International And Other [Member]
Segment Reporting Information [Line Items]
Advertising	0	5	0	15
Distribution	31,323	29,302	87,535	81,907
Consolidated revenues, net	31,323	29,307	87,535	81,922
Adjusted operating cash flow (deficit)	(8,513)	(8,117)	(27,252)	(25,738)
Depreciation and amortization	(4,338)	(3,919)	(12,617)	(11,205)
Share-based compensation expense	(1,032)	(899)	(3,022)	(2,735)
Gain Related to Litigation Settlement			132,944
Restructuring credit				3
Operating income (loss)	(13,883)	(12,935)	90,053	(39,675)
Capital Expenditures			14,419	9,402
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Advertising	0	0	0	0
Distribution	(3,935)	(3,479)	(11,898)	(11,692)
Consolidated revenues, net	(3,935)	(3,479)	(11,898)	(11,692)
Adjusted operating cash flow (deficit)	1,000	1,266	2,869	2,806
Depreciation and amortization	0	0	0	0
Share-based compensation expense	0	0	0	0
Gain Related to Litigation Settlement			0
Restructuring credit				0
Operating income (loss)	1,000	1,266	2,869	2,806
Capital Expenditures			0	0
Intersegment Eliminations [Member] | National Networks [Member]
Segment Reporting Information [Line Items]
Consolidated revenues, net	0	(6)	(184)	(510)
Intersegment Eliminations [Member] | International And Other [Member]
Segment Reporting Information [Line Items]
Consolidated revenues, net	$ (3,935)	$ (3,473)	$ (11,714)	$ (11,182)