Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Loss	Foreign Currency Translation Adjustment	Pension Plan Adjustment
Stockholders' equity at Dec. 30, 2011	$ (53,293)	$ 185	$ 718,837	$ (782,087)	$ 20,016	$ (10,244)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(36,768)	0	0	(36,768)	0	0
Net other comprehensive (loss) income	1,033	0	0	0	80	953
Issuance of shares pursuant to share-based payment plans	0	(4)	(4)	0	0	0
Share-based compensation	3,036	0	3,036	0	0	0
Stockholders' equity at Dec. 31, 2012	(85,992)	189	721,869	(818,855)	20,096	(9,291)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(24,895)	0	0	(24,895)	0	0
Net other comprehensive (loss) income	116	0	0	0	(815)	931
Issuance of shares pursuant to share-based payment plans	0	(6)	(6)	0	0	0
Share-based compensation	2,208	0	2,208	0	0	0
Stockholders' equity at Dec. 31, 2013	(108,563)	195	724,071	(843,750)	19,281	(8,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(59,279)	0	0	(59,279)	0	0
Net other comprehensive (loss) income	(5,756)	0	0	0	276	(6,032)
Issuance of shares pursuant to share-based payment plans	(1)	(1)	0	0	0	0
Share-based compensation	491	0	491	0	0	0
Stockholders' equity at Dec. 31, 2014	$ (173,106)	$ 196	$ 724,562	$ (903,029)	$ 19,557	$ (14,392)