Condensed Consolidated Statements Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 27, 2009	$ 771	$ 648,583	$ (435,794)	$ (27,266)	$ 6,514	$ 192,808
Balance, shares at Dec. 27, 2009	77,141
Comprehensive income (loss)
Net income (loss)			45,297		2,449	47,746
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax				390		390
Recognition in earnings of a previously unrecognized gain on a derivative instrument designated as a cash flow hedge, net of tax				(2,565)		(2,565)
Gains associated with pension and other postretirement benefit obligations, net of tax				5,869		5,869
Total other comprehensive income (loss), net of tax						3,694
Total comprehensive income (loss)						51,440
Common stock issued, value	1,372	798,628				800,000
Common stock issued, shares	137,141
Other activity		(4,401)			(3,608)	(8,009)
Balance at Sep. 26, 2010	2,143	1,442,810	(390,497)	(23,572)	5,355	1,036,239
Balance, shares at Sep. 26, 2010	214,282
Balance at Dec. 26, 2010	2,143	1,442,810	(348,653)	(23,637)	5,933	1,078,596
Balance, shares at Dec. 26, 2010	214,282
Comprehensive income (loss)
Net income (loss)			(411,417)		790	(410,627)
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax				(1,867)		(1,867)
Gains associated with pension and other postretirement benefit obligations, net of tax				12		12
Total other comprehensive income (loss), net of tax						(1,855)
Total comprehensive income (loss)						(412,482)
Share-based compensation		418				418
Other activity		107	1,480		(4,197)	(2,610)
Balance at Sep. 25, 2011	$ 2,143	$ 1,443,335	$ (758,590)	$ (25,492)	$ 2,526	$ 663,922
Balance, shares at Sep. 25, 2011	214,282