Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 8,303	$ 4,171	$ 23,590	$ 8,362
Other Comprehensive Income, Net of Tax:
Amortization of actuarial loss and prior service costs, net of tax of $(51) and $(45) for the three months ended September 28, 2019 and September 29, 2018, respectively, and $(154) and $(134) for the nine months ended September 28, 2019 and September 29, 2018, respectively	170	140	510	423
Change in unrealized gains and losses on cash flow hedges, net of tax of $(29) and $(16) for the three months ended September 28, 2019 and September 29, 2018, respectively, and $(2) and $(104) for the nine months ended September 28, 2019 and September 29, 2018, respectively	91		0
Change in unrealized gains and losses on cash flow hedges, net of tax of $(29) and $(16) for the three months ended September 28, 2019 and September 29, 2018, respectively, and $(2) and $(104) for the nine months ended September 28, 2019 and September 29, 2018, respectively		129		594
Other Comprehensive Income, Net of Tax	261	269	510	1,017
Comprehensive Income	$ 8,564	$ 4,440	$ 24,100	$ 9,379