Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Net loss	$ (19,272)	$ (28,116)
Other comprehensive income (loss):
Foreign currency translation adjustment	(389)	(185)
Defined benefit pension plan adjustments	20	84
Total comprehensive loss	$ (19,641)	$ (28,217)