Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Income Statement [Abstract]
Revenues	$ 692,245	$ 666,551	$ 1,334,034	$ 1,276,922
Cost of sales	(430,917)	(444,246)	(826,601)	(845,757)
Gross profit	261,328	222,305	507,433	431,165
Selling, general and administrative expenses	(126,635)	(105,203)	(248,209)	(208,269)
Research and development expenses	(30,970)	(25,989)	(60,354)	(49,445)
Amortization of intangibles	(11,126)	(9,177)	(20,736)	(17,994)
Operating income	92,597	81,936	178,134	155,457
Interest expense, net	(8,812)	(11,276)	(17,013)	(25,687)
Non-operating pension benefit	646	1,070	1,134	2,270
Loss on debt extinguishment	0	0	0	(6,392)
Income from continuing operations before taxes	84,431	71,730	162,255	125,648
Income tax expense	(15,656)	(13,088)	(30,535)	(22,910)
Income from continuing operations	68,775	58,642	131,720	102,738
Loss from discontinued operations, net of tax	0	0	0	(3,685)
Loss on disposal of discontinued operations, net of tax	0	0	0	(4,567)
Net income	68,775	58,642	131,720	94,486
Less: Net income (loss) attributable to noncontrolling interest	22	81	(225)	84
Net income attributable to Belden stockholders	$ 68,753	$ 58,561	$ 131,945	$ 94,402
Weighted average number of common shares and equivalents:
Basic (in shares)	42,497	44,252	42,663	44,535
Diluted (in shares)	43,088	44,782	43,380	45,179
Basic income (loss) per share attributable to Belden stockholders:
Continuing operations (in dollars per share)	$ 1.62	$ 1.32	$ 3.09	$ 2.31
Discontinued operations (in dollars per share)	0	0	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	0	0	(0.10)
Net income (in dollars per share)	1.62	1.32	3.09	2.12
Diluted income (loss) per share attributable to Belden stockholders:
Continuing operation (in dollars per share)	1.60	1.31	3.04	2.27
Discontinued operations (in dollars per share)	0	0	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	0	0	(0.10)
Net income (in dollars per share)	$ 1.60	$ 1.31	$ 3.04	$ 2.09
Comprehensive income attributable to Belden	$ 63,890	$ 110,712	$ 109,782	$ 150,481
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10