Investments - Equity Method Investments (Details) (USD $)	3 Months Ended									12 Months Ended
	Dec. 30, 2012		Sep. 23, 2012	Jun. 24, 2012	Mar. 25, 2012	Dec. 25, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Dec. 30, 2012		Dec. 25, 2011	Dec. 26, 2010
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party										$ 26,000,000		$ 34,000,000	$ 33,000,000
Income from joint ventures	927,000		1,027,000	1,079,000	(29,000)	4,054,000	(1,068,000)	2,791,000	(5,749,000)	3,004,000		28,000	19,035,000
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets	80,496,000					262,203,000				80,496,000		262,203,000
Non-current assets	79,913,000					1,405,110,000				79,913,000		1,405,110,000
Total assets	160,409,000					1,667,313,000				160,409,000		1,667,313,000
Current liabilities	37,300,000					551,105,000				37,300,000		551,105,000
Non-current liabilities	19,332,000					518,723,000				19,332,000		518,723,000
Total liabilities	56,632,000					1,069,828,000				56,632,000		1,069,828,000
Equity	103,777,000					522,930,000				103,777,000		522,930,000
Noncontrolling interest	0					74,555,000				0		74,555,000
Total liabilities & equity	160,409,000					1,667,313,000				160,409,000		1,667,313,000
Revenue										291,195,000		1,203,537,000	936,223,000
Cost and expenses										283,392,000		1,203,181,000	850,950,000
Operating (loss)/profit										7,803,000		356,000	85,273,000
Other income/(loss)										300,000		(10,014,000)	14,724,000
Pre-tax (loss)/income										8,103,000		(9,658,000)	99,997,000
Income tax expense/(benefit)										1,334,000		(25,004,000)	(111,000)
Net (loss)/income										6,769,000		15,346,000	100,108,000
Net income attributable to noncontrolling interest										0		(23,517,000)	(23,725,000)
Net (loss)/income less noncontrolling interest										6,769,000		(8,171,000)	76,383,000
Metro Boston LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	49.00%									49.00%
Donohue Malbaie Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	49.00%									49.00%
Equity Method Investment, Dividends or Distributions										7,300,000		0	0
Madison Paper Industries [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	40.00%									40.00%
Noncontrolling Interest, Ownership Percentage by Parent	10.00%									10.00%
Equity Method Investment, Dividends or Distributions										2,000,000		0	5,300,000
Income from joint ventures													12,700,000
quadrantONE LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	25.00%	[1]								25.00%	[1]
Gain on Sale at Madison Paper Industries Net of Non Controlling Interest [Member]
Schedule of Equity Method Investments [Line Items]
Income from joint ventures													$ 10,200,000
Madison Paper Industries Owned Consolidated Subsidiary [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	80.00%									80.00%
Noncontrolling Interest, Ownership Percentage by Parent	20.00%									20.00%

[1] quadrantONE announced in February 2013 that it will begin winding down its current operations. As of December 30, 2012, we had a nominal investment in quadrantONE.