Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 5,090	$ 7,815	$ 13,020	$ 15,287
Other Comprehensive Income, Net of Tax:
Amortization of actuarial loss and prior service costs, net of tax of $59 and $51 for the three months ended June 27, 2020 and June 29, 2019, respectively, and $118 and $103 for the six months ended June 27, 2020 and June 29, 2019, respectively	188	170	378	340
Change in unrealized gains and losses on cash flow hedges, net of tax of $31 and $5 for the three months ended June 27, 2020 and June 29, 2019, respectively, and $57 and $27 for the six months ended June 27, 2020 and June 29, 2019, respectively	76	(7)	162	(91)
Other Comprehensive Income, Net of Tax	264	163	540	249
Comprehensive Income	$ 5,354	$ 7,978	$ 13,560	$ 15,536