Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Comprehensive Income [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Noncontrolling Interests [Member]
Balance at Sep. 27, 2008	$ 358,055		$ (317,082)	$ 21,161	$ 740	$ 646,922	$ 6,314
Balance, shares at Sep. 27, 2008					74,056
Comprehensive income (loss)
Net income (loss)	(151,664)	(151,582)	(151,582)				(82)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(82)
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax	2,695	2,695		2,695
Recognition in earnings of a previously unrecognized gain on a derivative instrument designated as a cash flow hedge, net of tax	(357)	(357)		(357)
Gains associated with pension and other postretirement benefit obligations, net of tax	(50,736)	(50,736)		(50,736)
Total other comprehensive income (loss), net of tax	(48,398)	(48,398)
Total comprehensive income (loss)	(200,062)	(199,980)
Common stock issued, value					31	(31)
Common stock issued, shares					3,085
Other activity	(872)		(743)			(98)	(31)
Balance at Sep. 26, 2009	157,121		(469,407)	(27,237)	771	646,793	6,201
Balance, shares at Sep. 26, 2009					77,141
Comprehensive income (loss)
Net income (loss)	33,925	33,613	33,613				312
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	312
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax	41	41		41
Recognition in earnings of a previously unrecognized gain on a derivative instrument designated as a cash flow hedge, net of tax	(139)	(139)		(139)
Gains associated with pension and other postretirement benefit obligations, net of tax	69	69		69
Total other comprehensive income (loss), net of tax	(29)	(29)
Total comprehensive income (loss)	33,896	33,584
Share-based compensation	1,790					1,790
Other activity	1						1
Balance at Dec. 27, 2009	192,808		(435,794)	(27,266)	771	648,583	6,514
Balance, shares at Dec. 27, 2009					77,141
Comprehensive income (loss)
Net income (loss)	90,326	87,141	87,141				3,185
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	3,185
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax	(226)	(226)		(226)
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)		(2,565)
Gains associated with pension and other postretirement benefit obligations, net of tax	6,420	6,420		6,420
Total other comprehensive income (loss), net of tax	3,629	3,629
Total comprehensive income (loss)	93,955	90,770
Common stock issued, value	800,000				1,372	798,628
Common stock issued, shares					137,141
Other activity	(8,167)					(4,401)	(3,766)
Balance at Dec. 26, 2010	1,078,596		(348,653)	(23,637)	2,143	1,442,810	5,933
Balance, shares at Dec. 26, 2010					214,282
Comprehensive income (loss)
Net income (loss)	(495,690)	(496,772)	(496,772)				1,082
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	1,082
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) on available-for-sale securities, net of tax	(1,160)	(1,160)		(1,160)
Recognition in earnings of a previously unrecognized gain on a derivative instrument designated as a cash flow hedge, net of tax	0	0		0
Gains associated with pension and other postretirement benefit obligations, net of tax	(21,273)	(21,273)		(21,273)
Total other comprehensive income (loss), net of tax	(22,433)	(22,433)
Total comprehensive income (loss)	(518,123)	(519,205)
Share-based compensation	567					567
Other activity	(2,610)		1,480			107	(4,197)
Balance at Dec. 25, 2011	$ 558,430		$ (843,945)	$ (46,070)	$ 2,143	$ 1,443,484	$ 2,818
Balance, shares at Dec. 25, 2011					214,282