Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 28, 2014	Sep. 30, 2015	Sep. 28, 2014	Dec. 28, 2014
Segment Reporting Information [Line Items]
Operating revenues	$ 488,594	$ 474,858	$ 1,462,855	$ 1,395,939
Operating profit (loss)	38,808	55,285	119,527	137,738
Depreciation	19,027	17,991	54,047	52,242
Amortization	49,780	47,953	145,988	169,645
Capital expenditures	25,058	20,289	63,775	59,886
Total Assets	10,413,399		10,413,399		$ 11,396,455
Assets held for sale	41,008		41,008		5,645
Operating Segments | Television and Entertainment
Segment Reporting Information [Line Items]
Operating revenues	429,700	418,294	1,285,622	1,245,456
Operating profit (loss)	64,061	74,294	190,497	191,405
Depreciation	12,194	12,693	35,640	38,205
Amortization	41,475	42,010	124,460	154,837
Total Assets	8,281,044		8,281,044		8,234,456
Operating Segments | Digital and Data
Segment Reporting Information [Line Items]
Operating revenues	46,561	43,434	140,388	108,726
Operating profit (loss)	(6,207)	(396)	(6,623)	(11,392)
Depreciation	2,456	2,035	6,882	5,757
Amortization	8,305	5,943	21,528	14,808
Total Assets	717,929		717,929		644,985
Corporate and Other
Segment Reporting Information [Line Items]
Operating revenues	12,333	13,130	36,845	41,757
Operating profit (loss)	(19,046)	(18,613)	(64,347)	(42,275)
Depreciation	4,377	3,263	11,525	8,280
Total Assets	1,373,418		1,373,418		$ 2,511,369
Continuing operations | Operating Segments | Television and Entertainment
Segment Reporting Information [Line Items]
Capital expenditures	5,405	7,909	19,681	17,301
Continuing operations | Operating Segments | Digital and Data
Segment Reporting Information [Line Items]
Capital expenditures	6,740	2,008	17,262	7,403
Continuing operations | Corporate and Other
Segment Reporting Information [Line Items]
Capital expenditures	12,913	7,068	26,832	28,887
Discontinued operations
Segment Reporting Information [Line Items]
Capital expenditures	$ 0	$ 3,304	$ 0	$ 6,295