Discontinued Operations (Narrative) (Details) $ in Thousands	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 25, 2016 USD ($)	Sep. 25, 2016 USD ($)	Jun. 26, 2016 USD ($)	Mar. 27, 2016 USD ($)	Dec. 28, 2014 USD ($)	Dec. 29, 2013 USD ($)	Dec. 30, 2012 USD ($)	Mar. 25, 2012 USD ($) Newspaper	Dec. 30, 2012 USD ($)	Dec. 25, 2016 USD ($)	Dec. 27, 2015 USD ($)	Dec. 28, 2014 USD ($)	Dec. 29, 2013 USD ($)	Dec. 30, 2012 USD ($)
Discontinued operations
Loss/(gain) on sales of disposal group												$ 975
(Loss)/gain on sale, net of income taxes												(1,086)
Loss from discontinued operations, net of income taxes	$ (2,273)	$ 0	$ 0	$ 0						$ (2,273)	$ 0	(1,086)
New England Media Group [Member]
Discontinued operations
Proceeds from the sale of discontinued operations						$ 70,000
Net after-tax proceeds from sale, including tax benefit						$ 74,000
Loss/(gain) on sales of disposal group	3,700									3,651		349	$ (47,600)
(Loss)/gain on sale, net of income taxes	$ (2,300)									(2,273)		(222)	$ 28,100
Loss from discontinued operations, net of income taxes										$ (2,273)		(222)
About Group [Member]
Discontinued operations
Proceeds from the sale of discontinued operations							$ 300,000
Net after-tax proceeds from sale, including tax benefit														$ 291,000
Loss/(gain) on sales of disposal group												229		(96,700)
(Loss)/gain on sale, net of income taxes												(136)		$ 61,900
Net working capital adjustment							$ 17,000
Loss from legal settlement					$ 200
Loss from discontinued operations, net of income taxes												(136)
Regional Media Group [Member]
Discontinued operations
Proceeds from the sale of discontinued operations								$ 140,000
Net after-tax proceeds from sale, including tax benefit								150,000
Loss/(gain) on sales of disposal group												397
(Loss)/gain on sale, net of income taxes								$ 23,600				(728)
Number of newspapers, print publications and related businesses sold | Newspaper								16
Loss from discontinued operations, net of income taxes									$ 6,600			$ (728)
Loss from environmental contingency					$ 400
Metro Boston LLC [Member]
Discontinued operations
Equity method investment, ownership percentage						49.00%							49.00%