Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Income Statement [Abstract]
Revenues	$ 666,551	$ 575,857	$ 1,276,922	$ 1,084,540
Cost of sales	(444,246)	(384,503)	(845,757)	(724,003)
Gross profit	222,305	191,354	431,165	360,537
Selling, general and administrative expenses	(105,203)	(93,570)	(208,269)	(174,205)
Research and development expenses	(25,989)	(22,263)	(49,445)	(44,875)
Amortization of intangibles	(9,177)	(7,172)	(17,994)	(15,165)
Asset impairments	0	0	0	(6,995)
Operating income	81,936	68,349	155,457	119,297
Interest expense, net	(11,276)	(14,870)	(25,687)	(30,381)
Loss on debt extinguishment	0	0	(6,392)	0
Non-operating pension benefit	1,070	1,445	2,270	2,129
Income from continuing operations before taxes	71,730	54,924	125,648	91,045
Income tax expense	(13,088)	(9,578)	(22,910)	(16,634)
Income from continuing operations	58,642	45,346	102,738	74,411
Loss from discontinued operations, net of tax	0	(1,374)	(3,685)	(1,698)
Loss on disposal of discontinued operations, net of tax	0	0	(4,567)	0
Net income	58,642	43,972	94,486	72,713
Less: Net income attributable to noncontrolling interest	81	208	84	283
Net income attributable to Belden stockholders	$ 58,561	$ 43,764	$ 94,402	$ 72,430
Weighted average number of common shares and equivalents:
Basic (in shares)	44,252	44,759	44,535	44,717
Diluted (in shares)	44,782	45,262	45,179	45,162
Basic income (loss) per share attributable to Belden stockholders:
Continuing operations (in dollars per share)	$ 1.32	$ 1.01	$ 2.31	$ 1.66
Discontinued operations (in dollars per share)	0	(0.03)	(0.08)	(0.04)
Disposal of discontinued operations (in dollars per share)	0	0	(0.10)	0
Net income (in dollars per share)	1.32	0.98	2.12	1.62
Diluted income (loss) per share attributable to Belden stockholders:
Continuing operation (in dollars per share)	1.31	1.00	2.27	1.64
Discontinued operations (in dollars per share)	0	(0.03)	(0.08)	(0.04)
Disposal of discontinued operations (in dollars per share)	0	0	(0.10)	0
Net income (in dollars per share)	$ 1.31	$ 0.97	$ 2.09	$ 1.60
Comprehensive income attributable to Belden	$ 110,712	$ 22,499	$ 150,481	$ 104,890
Common stock dividends declared per share (in dollars per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10