Computation of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Numerators:
Consolidated net income	$ 20,879	$ 17,479	$ 39,144	$ 36,299
Denominators:
Weighted average common shares outstanding—basic	35,851	35,609	35,830	35,573
Dilutive potential common shares	181	324	185	284
Weighted average common shares outstanding— diluted	36,032	35,933	36,015	35,857
Antidilutive potential common shares excluded from above	141	146	127	120
Earnings per common share:
Basic	$ 0.58	$ 0.49	$ 1.09	$ 1.02
Diluted	$ 0.58	$ 0.49	$ 1.09	$ 1.01