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. 27, 2014		8,460
Stockholders' equity, beginning balance at Dec. 27, 2014	$ (632,675)	$ 85	$ 370,820	$ (905,383)	$ (98,197)
Other comprehensive income (loss):
Net income (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 income (loss)	(7,733)
Comprehensive income (loss)	(38,584)
Purchase and retirement of common stock upon vesting of RSUs (shares)		24
Purchase and retirement of common stock upon vesting of restricted stock units	(216)	$ 0	(216)
Amortization of stock based compensation	$ 1,636		1,636
Common stock, ending balance (shares) at Jan. 02, 2016	8,484	8,484
Stockholders' equity, ending balance at Jan. 02, 2016	$ (669,839)	$ 85	372,240	(936,234)	(105,930)
Other comprehensive income (loss):
Net income (loss)	67,949			67,949
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	756				756
Currency translation adjustment, net	1,945				1,945
Total other comprehensive income (loss)	2,701
Comprehensive income (loss)	70,650
Issuance of Warrants in connection with the Exchange Offer (1)	6,264		6,264
Impact of Exchange Offer with affiliated noteholders (1)	1,375		1,375
Issuance of Warrants in connection with the repurchase of the 7% senior exchangeable notes due 2017 (1)	1,270		1,270
Purchase and retirement of common stock upon vesting of RSUs (shares)		69
Purchase and retirement of common stock upon vesting of restricted stock units	(345)	$ (1)	(346)
Amortization of stock based compensation	$ 1,468		1,468
Common stock, ending balance (shares) at Dec. 31, 2016	8,553	8,553
Stockholders' equity, ending balance at Dec. 31, 2016	$ (589,157)	$ 86	$ 382,271	$ (868,285)	$ (103,229)