Accumulated Other Comprehensive Loss (Table 2 Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net of tax			$ 34	$ 299
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of unrecognized prior service costs	$ 7	$ 6	13	13
Amortization of unrecognized cumulative actuarial net loss	24	159	49	317
Total before tax	31	165	62	330
Tax benefit	(14)	(14)	(28)	(31)
Net of tax	$ 17	$ 151	$ 34	$ 299