Consolidated Statements Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Other Comprehensive (Loss) Income (Net Of Tax) [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2011	$ 230	$ 1,623,006	$ (1,146)	$ (512,573)	$ 1,109,517
Balances (in shares) at Dec. 31, 2011	230,233
Net income (loss)				(320,259)	(320,259)
Other comprehensive income (loss)			1,762		1,762
Issuance of common stock under stock benefit plans (in shares)	4,423
Issuance of common stock under stock benefit plans	4	15,134			15,138
Stock-based compensation expense		26,315			26,315
Benefit of stock option related loss carry-forwards		14,263			14,263
Prior period adjustments		1,950			1,950
Repurchases of common stock (in shares)	(33,732)
Repurchase of common stock	(33)	(125,782)		(74,184)	(199,999)
Balances at Dec. 29, 2012	201	1,554,886	616	(907,016)	648,687
Balance (in shares) at Dec. 29, 2012	200,924
Net income (loss)				(32,254)	(32,254)
Other comprehensive income (loss)			(1,142)		(1,142)
Issuance of common stock under stock benefit plans (in shares)	6,537
Issuance of common stock under stock benefit plans	7	23,373			23,380
Stock-based compensation expense		26,264			26,264
Benefit of stock option related loss carry-forwards		842			842
Repurchases of common stock (in shares)	(13,046)
Repurchase of common stock	(13)	(55,175)		(23,765)	(78,953)
Balances at Dec. 28, 2013	195	1,550,190	(526)	(963,035)	586,824
Balance (in shares) at Dec. 28, 2013	194,415				194,415
Net income (loss)				82	82
Other comprehensive income (loss)			(1,829)		(1,829)
Conversion of special shares into common shares (in shares)	4
Conversion of special shares into common shares		10			10
Cancellations, expirations and conversions of special shares		434			434
Issuance of common stock under stock benefit plans (in shares)	6,498
Issuance of common stock under stock benefit plans	6	26,721			26,727
Stock-based compensation expense		23,181			23,181
Repurchases of common stock (in shares)	(1,399)
Repurchase of common stock	(1)	(4,927)		(4,010)	(8,938)
Balances at Dec. 27, 2014	$ 200	$ 1,595,609	$ (2,355)	$ (966,963)	$ 626,491
Balance (in shares) at Dec. 27, 2014	199,518				199,518