CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Common stock, beginning balance (shares) at Dec. 29, 2012		63,762
Stockholders' equity, beginning balance at Dec. 29, 2012	$ (464,314)	$ 638	$ 354,983	$ (752,734)	$ (67,201)
Other comprehensive (loss) income:
Net loss	(68,786)			(68,786)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	31,430				31,430
Currency translation adjustment, net	(4,529)				(4,529)
Total other comprehensive (loss) income	26,901
Total comprehensive loss	(41,885)
Issuance of stock (shares)		2,083
Issuance of stock	6,042	$ 21	6,021
Exercise of stock options (shares)		20
Exercise of stock options	98	$ 0	98
Purchase and retirement of common stock upon vesting of RSUs (shares)		400
Purchase and retirement of common stock upon vesting of RSUs	(660)	$ (4)	(664)
Amortization of stock based compensation	3,739		3,739
Common stock, ending balance (shares) at Dec. 28, 2013		66,265
Stockholders' equity, ending balance at Dec. 28, 2013	(496,980)	$ 663	364,177	(821,520)	(40,300)
Other comprehensive (loss) income:
Net loss	(83,863)			(83,863)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	(56,576)				(56,576)
Currency translation adjustment, net	(1,321)				(1,321)
Total other comprehensive (loss) income	(57,897)
Total comprehensive loss	(141,760)
Exchange of 7% Notes (shares)		1,068
Exchange of 7% Notes	4,187	$ 11	4,176
Exercise of stock options (shares)		10
Exercise of stock options	20	$ 0	20
Purchase and retirement of common stock upon vesting of RSUs (shares)		339
Purchase and retirement of common stock upon vesting of RSUs	(562)	$ (3)	(565)
Amortization of stock based compensation	$ 2,420		2,420
Common stock, ending balance (shares) at Dec. 27, 2014	67,682	67,682
Stockholders' equity, ending balance at Dec. 27, 2014	$ (632,675)	$ 677	370,228	(905,383)	(98,197)
Other comprehensive (loss) income:
Net loss	(30,851)			(30,851)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	(3,438)				(3,438)
Currency translation adjustment, net	(4,295)				(4,295)
Total other comprehensive (loss) income	(7,733)
Total comprehensive loss	(38,584)
Purchase and retirement of common stock upon vesting of RSUs (shares)		192
Purchase and retirement of common stock upon vesting of RSUs	(216)	$ (2)	(218)
Amortization of stock based compensation	$ 1,636		1,636
Common stock, ending balance (shares) at Jan. 02, 2016	67,874	67,874
Stockholders' equity, ending balance at Jan. 02, 2016	$ (669,839)	$ 679	$ 371,646	$ (936,234)	$ (105,930)