Discontinued Operations (Details) (USD $)	3 Months Ended					9 Months Ended				12 Months Ended
	Sep. 28, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013		Sep. 28, 2014		Sep. 29, 2013		Dec. 29, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge								$ 34,300,000	[1]
New England Media Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations			70,000,000
Net after-tax proceeds from the sale, including a tax benefit			74,000,000
Pre-tax gain										47,600,000
Working capital adjustment		1,600,000
Impairment charge				34,300,000
Discontinued Operation Income Statement Disclosures [Abstract]
Revenues	0			89,073,000		0		268,737,000
Total operating costs	0			85,157,000		0		262,079,000
Multiemployer pension plan withdrawal expense	0			7,997,000	[2]	0	[2]	7,997,000	[2]
Write-down of assets	0			34,300,000		0		34,300,000
Loss from joint ventures	0			(82,000)		0		(205,000)
Interest expense, net	0			3,000		0		9,000
Pre-tax loss	0			(38,466,000)		0		(35,853,000)
Income tax benefit	0			(19,479,000)		0		(16,858,000)
Income/(loss) from discontinued operations, net of income taxes	0			(18,987,000)		0		(18,995,000)
Loss on sale	0			0		(1,559,000)		0
Income tax benefit	0			0		(565,000)		0
Loss on sale, net of income taxes	0			0		(994,000)		0
Loss from discontinued operations, net of income taxes	$ 0			$ (18,987,000)		$ (994,000)		$ (18,995,000)		$ 28,100,000
MetroBostonLLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage ownership			49.00%							49.00%

[1] Impairment losses related to the New England Media Group are included within “(Loss) from discontinued operations, net of income taxes” in the Condensed Consolidated Statements of Operations for the quarter and nine months ended September 29, 2013. See Note 11 for additional information.

[2] The multiemployer pension plan withdrawal expense related to estimated charges for complete or partial withdrawal obligations under multiemployer pension plans triggered by the sale of the New England Media Group.