Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Total Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2023	Apr. 03, 2022
Equity [Abstract]
Net income	$ 62,945	$ 35,844
Foreign currency translation adjustments, net of tax	(17,018)	3,762
Adjustments to pension and postretirement liability, net of tax	(280)	193
Total comprehensive income	45,647	39,799
Less: Comprehensive income (loss) attributable to noncontrolling interests	(245)	30
Comprehensive income attributable to Belden	$ 45,892	$ 39,769