Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income (Loss) Detail (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized prior service costs	$ 28	$ 21
Amortization of unrecognized cumumative actuarial net (gain) loss	(34)	740
Total before tax	(6)	761
Tax expense	21	138
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	$ (27)	$ 623