CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Income Statement [Abstract]
Revenues	$ 604,336	$ 692,245	$ 1,140,011	$ 1,334,034
Cost of sales	(377,530)	(430,917)	(711,609)	(826,601)
Gross profit	226,806	261,328	428,402	507,433
Selling, general and administrative expenses	(119,497)	(126,635)	(230,265)	(248,209)
Research and development expenses	(28,457)	(30,970)	(55,456)	(60,354)
Amortization of intangibles	(9,940)	(11,126)	(20,749)	(20,736)
Operating income	68,912	92,597	121,932	178,134
Interest expense, net	(9,017)	(8,812)	(16,599)	(17,013)
Non-operating pension benefit	230	646	461	1,134
Income before taxes	60,125	84,431	105,794	162,255
Income tax expense	(11,091)	(15,656)	(19,451)	(30,535)
Net income	49,034	68,775	86,343	131,720
Less: Net income (loss) attributable to noncontrolling interest	(10)	22	(14)	(225)
Net income attributable to Belden stockholders	$ 49,044	$ 68,753	$ 86,357	$ 131,945
Weighted average number of common shares and equivalents:
Basic (in shares)	40,690	42,497	40,838	42,663
Diluted (in shares)	41,204	43,088	41,348	43,380
Basic income per share attributable to Belden stockholders (in dollars per share)	$ 1.21	$ 1.62	$ 2.11	$ 3.09
Diluted income per share attributable to Belden stockholders (in dollars per share)	$ 1.19	$ 1.60	$ 2.09	$ 3.04
Comprehensive income attributable to Belden	$ 55,956	$ 63,890	$ 102,417	$ 109,782
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10