Consolidated Statements of Comprehensive Operations (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 30, 2011	Dec. 31, 2010
Net loss	$ (36,768)	$ (62,717)	$ (38,540)
Foreign currency translation adjustment	80	2,380	(7,256)
Pension liability adjustments, net of tax	953	(5,837)	3,329
Amortization of losses on derivative instruments, net of tax	0	0	2,904
Total other comprehensive income (loss)	1,033	(3,457)	(1,023)
Total comprehensive loss	$ (35,735)	$ (66,174)	$ (39,563)