CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 26, 2010	$ 2,143	$ 1,442,810	$ (348,653)	$ (23,637)	$ 5,933	$ 1,078,596
Balance (in shares) at Dec. 26, 2010	214,282
Comprehensive income (loss):
Net income (loss)	0	0	(248,901)	0	1,074	(247,827)
Other comprehensive loss, net of tax:
Net unrealized holding losses on available-for-sale securities, net of tax of $0	0	0	0	(720)	0	(720)
Losses associated with pension and other postretirement benefit obligations, net of tax of $0	0	0	0	(11)	0	(11)
Total other comprehensive loss, net of tax						(731)
Total comprehensive income (loss)						(248,558)
Share-based compensation plans:
Share-based compensation	0	269	0	0	0	269
Other activity	0	107	1,480	0	(4,197)	(2,610)
Balance at Jun. 26, 2011	2,143	1,443,186	(596,074)	(24,368)	2,810	827,697
Balance (in shares) at Jun. 26, 2011	214,282
Balance at Dec. 25, 2011	2,143	1,443,484	(843,945)	(46,070)	2,818	558,430
Balance (in shares) at Dec. 25, 2011	214,282
Comprehensive income (loss):
Net income (loss)	0	0	108,531	0	220	108,751
Other comprehensive loss, net of tax:
Losses associated with pension and other postretirement benefit obligations, net of tax of $0	0	0	0	(11,025)	0	(11,025)
Total other comprehensive loss, net of tax						(11,025)
Total comprehensive income (loss)						97,726
Issuance of common stock	444	197,838	0	0	0	198,282
Issuance of common stock (in shares)	44,444
Share-based compensation plans:
Common stock issued under compensation plans	2	0	0	0	0	2
Common stock issued under compensation plans (in shares)	200
Requisite service period recognition	0	297	0	0	0	297
Balance at Jun. 24, 2012	$ 2,589	$ 1,641,619	$ (735,414)	$ (57,095)	$ 3,038	$ 854,737
Balance (in shares) at Jun. 24, 2012	258,926