Discontinued Operations - Income Statement Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 29, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax	$ (7,474)	$ 43,481
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues		741,274
Income (loss) from discontinued operations, before income taxes		52,990
Provision for income taxes		(9,509)
Income (loss) from discontinued operations, net of tax		43,481
Discontinued Operations, Disposed of by Sale | Publishing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues		694,751
Income (loss) from discontinued operations, before income taxes		64,858
Provision for income taxes		(13,269)
Income (loss) from discontinued operations, net of tax		51,589
Discontinued Operations, Disposed of by Sale | Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	3,379	46,523
Income (loss) from discontinued operations, before income taxes	(6,299)	(11,868)
Provision for income taxes	(1,175)	3,760
Income (loss) from discontinued operations, net of tax	$ (7,474)	$ (8,108)