Postretirement Benefits Change in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Compensation and Retirement Disclosure [Abstract]
Net actuarial loss	$ 581	$ 350
Amortization of net loss	(134)	(84)
Amortization of prior service credit	359	359
Change in postretirement benefit obligations, tax	322	243	98
Total recognized in accumulated other comprehensive income	$ 484	$ 382	$ 128

Tax effect, net of reclassification adjustments, of the change in accumulated other comprehensive income (loss) related to pension and other postretirement benefit plans, attributable to the parent entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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+ Details