Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 6,357	$ 10,148	$ 21,690	$ 27,712
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(3,653)	(8,479)	(3,831)	(18,214)
Pension and other postretirement actuarial items	0	65	2	227
Other comprehensive loss	(3,653)	(8,414)	(3,829)	(17,987)
Comprehensive income	2,704	1,734	17,861	9,725
Less: comprehensive income attributable to noncontrolling interests	77	30	210	483
Comprehensive income attributable to VPG stockholders	$ 2,627	$ 1,704	$ 17,651	$ 9,242