CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Income Statement [Abstract]
Revenues	$ 535,675	$ 641,789
Cost of sales	(334,079)	(395,684)
Gross profit	201,596	246,105
Selling, general and administrative expenses	(110,768)	(121,574)
Research and development expenses	(26,999)	(29,384)
Amortization of intangibles	(10,809)	(9,610)
Operating income	53,020	85,537
Interest expense, net	(7,582)	(8,201)
Non-operating pension benefit	231	488
Income before taxes	45,669	77,824
Income tax expense	(8,360)	(14,879)
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
Weighted average number of common shares and equivalents:
Basic (in shares)	40,986	42,827
Diluted (in shares)	41,491	43,669
Basic income per share attributable to Belden stockholders (in dollars per share)	$ 0.91	$ 1.48
Diluted income per share attributable to Belden stockholders (in dollars per share)	$ 0.90	$ 1.45
Comprehensive income attributable to Belden	$ 46,461	$ 45,892
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05