CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Net income (loss)	$ (12,243)	$ 15,719	$ 24,644
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,689	(1,076)	(7,270)
Adjustments related to postretirement benefits	122	1,267	(1,506)
Change in unrealized gain/loss on investments	(16)	(6)	(83)
Other comprehensive income (loss), net of tax	1,795	185	(8,859)
Comprehensive income (loss)	$ (10,448)	$ 15,904	$ 15,785