Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Net (loss) income	$ (2,470)	$ (1,904)	$ (8,093)	$ 33,392
Other comprehensive loss:
Amortization of prior service benefit	(42)	(44)	(126)	(133)
Amortization of actuarial loss	8	10	25	24
Adjustments to net periodic benefit cost	(34)	(34)	(101)	(109)
Comprehensive (loss) income	$ (2,504)	$ (1,938)	$ (8,194)	$ 33,283