CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 13,038	$ 8,567	$ 22,640	$ 13,559
Defined benefit plans:
Net change in plan assets	2,593	(457)	6,661	2,627
Reclassification into other income (expense), net	33	120	85	240
Foreign currency translation loss	(1,502)	(111)	(2,516)	(1,227)
Tax effect	188	69	67	69
Other comprehensive income (loss), net of tax	1,312	(379)	4,297	1,709
Comprehensive income	$ 14,350	$ 8,188	$ 26,937	$ 15,268