Segment Information (Summary Of Continuing Operations By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Advertising	$ 163,960	$ 129,237
Distribution	218,001	197,002
Consolidated revenues, net	381,961	326,239
Adjusted operating cash flow (deficit)	150,166	125,670
Depreciation and amortization	(18,345)	(25,051)
Share-based compensation expense	(4,337)	(3,583)
Restructuring credit	0	3
Operating income (loss)	127,484	97,039
Capital Expenditures	8,003	2,838
National Networks [Member]
Segment Reporting Information [Line Items]
Advertising	163,960	129,237
Distribution	195,506	174,986
Consolidated revenues, net	359,466	304,223
Adjusted operating cash flow (deficit)	159,103	133,372
Depreciation and amortization	(14,221)	(21,305)
Share-based compensation expense	(3,448)	(2,849)
Restructuring credit		0
Operating income (loss)	141,434	109,218
Capital Expenditures	1,473	443
International And Other [Member]
Segment Reporting Information [Line Items]
Advertising	0	0
Distribution	26,293	26,346
Consolidated revenues, net	26,293	26,346
Adjusted operating cash flow (deficit)	(9,901)	(8,207)
Depreciation and amortization	(4,124)	(3,746)
Share-based compensation expense	(889)	(734)
Restructuring credit		3
Operating income (loss)	(14,914)	(12,684)
Capital Expenditures	6,530	2,395
Inter-segment Eliminations [Member]
Segment Reporting Information [Line Items]
Advertising	0	0
Distribution	(3,798)	(4,330)
Consolidated revenues, net	(3,798)	(4,330)
Adjusted operating cash flow (deficit)	964	505
Depreciation and amortization	0	0
Share-based compensation expense	0	0
Restructuring credit		0
Operating income (loss)	964	505
Capital Expenditures	$ 0	$ 0