Income per Share - Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Numerator:
Net income	$ 37,309	$ 62,945
Less: Net loss attributable to noncontrolling interest	(4)	(247)
Net income attributable to Belden stockholders	$ 37,313	$ 63,192
Denominator:
Weighted average shares outstanding, basic (in shares)	40,986	42,827
Effect of dilutive common stock equivalents (in shares)	505	842
Weighted average shares outstanding, diluted (in shares)	41,491	43,669