Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Income Statement [Abstract]
Revenues	$ 670,491	$ 604,761	$ 1,947,413	$ 1,689,301
Cost of sales	(431,845)	(401,384)	(1,277,602)	(1,125,387)
Gross profit	238,646	203,377	669,811	563,914
Selling, general and administrative expenses	(110,478)	(95,337)	(318,747)	(269,542)
Research and development expenses	(26,306)	(23,235)	(75,751)	(68,110)
Amortization of intangibles	(10,105)	(7,780)	(28,099)	(22,945)
Asset impairments	0	(2,288)	0	(9,283)
Gain on sale of asset	37,891	0	37,891	0
Operating income	129,648	74,737	285,105	194,034
Interest expense, net	(9,883)	(16,251)	(35,570)	(46,632)
Loss on debt extinguishment	0	(5,715)	(6,392)	(5,715)
Non-operating pension benefit	26	992	2,296	3,121
Income from continuing operations before taxes	119,791	53,763	245,439	144,808
Income tax expense	(16,104)	(9,799)	(39,014)	(26,433)
Income from continuing operations	103,687	43,964	206,425	118,375
Loss from discontinued operations, net of tax	0	(2,647)	(3,685)	(4,345)
Loss on disposal of discontinued operations, net of tax	(5,366)	0	(9,933)	0
Net income	98,321	41,317	192,807	114,030
Less: Net income attributable to noncontrolling interest	27	53	111	336
Net income attributable to Belden stockholders	$ 98,294	$ 41,264	$ 192,696	$ 113,694
Weighted average number of common shares and equivalents:
Basic (in shares)	43,466	44,851	44,181	44,762
Diluted (in shares)	44,063	45,425	44,810	45,242
Basic income (loss) per share attributable to Belden stockholders:
Continuing operations (in dollars per share)	$ 2.38	$ 0.98	$ 4.67	$ 2.64
Discontinued operations (in dollars per share)	0	(0.06)	(0.08)	(0.10)
Disposal of discontinued operations (in dollars per share)	(0.12)	0	(0.22)	0
Net income (in dollars per share)	2.26	0.92	4.36	2.54
Diluted income (loss) per share attributable to Belden stockholders:
Continuing operation (in dollars per share)	2.35	0.97	4.60	2.61
Discontinued operations (in dollars per share)	0	(0.06)	(0.08)	(0.10)
Disposal of discontinued operations (in dollars per share)	(0.12)	0	(0.22)	0
Net income (in dollars per share)	$ 2.23	$ 0.91	$ 4.30	$ 2.51
Comprehensive income attributable to Belden	$ 149,907	$ 69,390	$ 300,388	$ 174,280
Common stock dividends declared per share (in dollars per share)	$ 0.05	$ 0.05	$ 0.15	$ 0.15