CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Stockholders' equity, beginning balance at Jan. 01, 2011	$ (341,331)	$ 627	$ 342,607	$ (664,282)	$ (20,283)
Common stock, beginning balance (shares) at Jan. 01, 2011		62,727,000
Other comprehensive income (loss):
Net loss	(8,565)			(8,565)
Other comprehensive income (loss):
Pension liability adjustment, net of taxes	(37,130)				(37,130)
Reclassification of losses related to interest rate swaps into earnings, net of taxes	1,793				1,793
Currency translation adjustment	(4,260)				(4,260)
Other comprehensive income	(39,597)
Total comprehensive loss	(48,162)
Exercise of stock options (shares)		533,000
Exercise of stock options	356	6	350
Purchase and retirement of common stock upon vesting of RSUs	(1,283)		(1,283)
Amortization of stock based compensation	8,716		8,716
Stockholders' equity, ending balance at Dec. 31, 2011	(381,704)	633	350,390	(672,847)	(59,880)
Common stock, ending balance (shares) at Dec. 31, 2011		63,260,000
Other comprehensive income (loss):
Net loss	(79,887)			(79,887)
Other comprehensive income (loss):
Pension liability adjustment, net of taxes	(7,986)				(7,986)
Reclassification of losses related to interest rate swaps into earnings, net of taxes	0
Currency translation adjustment	665				665
Other comprehensive income	(7,321)
Total comprehensive loss	(87,208)
Purchase and retirement of common stock upon vesting of RSUs (shares)		502,000
Purchase and retirement of common stock upon vesting of RSUs	(735)	(5)	(740)
Amortization of stock based compensation	5,333		5,333
Stockholders' equity, ending balance at Dec. 29, 2012	(464,314)	638	354,983	(752,734)	(67,201)
Common stock, ending balance (shares) at Dec. 29, 2012	63,762,000	63,762,000
Other comprehensive income (loss):
Net loss	(68,786)			(68,786)
Other comprehensive income (loss):
Pension liability adjustment, net of taxes	31,430				31,430
Reclassification of losses related to interest rate swaps into earnings, net of taxes	0
Currency translation adjustment	(4,529)				(4,529)
Other comprehensive income	26,901
Total comprehensive loss	(41,885)
Issuance of stock (shares)		2,083,000
Issuance of stock	6,042	21	6,021
Exercise of stock options (shares)		20,000
Exercise of stock options	98	0	98
Purchase and retirement of common stock upon vesting of RSUs (shares)		400,000
Purchase and retirement of common stock upon vesting of RSUs	(660)	(4)	(664)
Amortization of stock based compensation	3,739		3,739
Stockholders' equity, ending balance at Dec. 28, 2013	$ (496,980)	$ 663	$ 364,177	$ (821,520)	$ (40,300)
Common stock, ending balance (shares) at Dec. 28, 2013	66,265,000	66,265,000