Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 3,861	$ 1,782	$ 17,411	$ (191)
Other Comprehensive (Loss) Income
Amortization of actuarial losses and prior service costs, net of tax of $73 and $68 for the three months ended July 2, 2016 and July 4, 2015, respectively, and $141 and $165 for the six months ended July 4, 2016 and July 2, 2015, respectively	117	153	240	278
Change in unrealized gains and losses on cash flow hedges, net of tax of $87 and zero for the three months ended July 2, 2016 and July 4, 2015, respectively, and $326 and zero for the six months ended July 4, 2016 and July 2, 2015, respectively	(148)	0	(556)	0
Other Comprehensive (Loss) Income	(31)	153	(316)	278
Comprehensive Income	$ 3,830	$ 1,935	$ 17,095	$ 87