Condensed Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Net income (loss)	$ (3,890)	$ 856	$ (10,861)	$ 14,548
Other comprehensive loss, net of tax:
Change in unrealized gain on investments	(29)	(59)	(42)	(86)
Change in minimum post retirement benefits obligation	2	2	4	5
Change in cash flow hedges	20	0	(40)	(89)
Other comprehensive loss	(7)	(57)	(78)	(170)
Total comprehensive income (loss)	$ (3,897)	$ 799	$ (10,939)	$ 14,378