Postretirement Benefits Change in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Compensation and Retirement Disclosure [Abstract]
Net actuarial (gain) loss	$ (285)	$ 581
Amortization of net loss	(135)	(134)
Amortization of prior service credit	357	359
Deferred income taxes	30	(322)
Total recognized in accumulated other comprehensive income	$ (33)	$ 484	$ 382