Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2023	Apr. 03, 2022
Income Statement [Abstract]
Revenues	$ 641,789	$ 610,371
Cost of sales	(395,684)	(401,511)
Gross profit	246,105	208,860
Selling, general and administrative expenses	(121,574)	(103,066)
Research and development expenses	(29,384)	(23,456)
Amortization of intangibles	(9,610)	(8,817)
Operating income	85,537	73,521
Interest expense, net	(8,201)	(14,411)
Non-operating pension benefit	488	1,200
Loss on debt extinguishment	0	(6,392)
Income from continuing operations before taxes	77,824	53,918
Income tax expense	(14,879)	(9,822)
Income from continuing operations	62,945	44,096
Loss from discontinued operations, net of tax	0	(3,685)
Loss on disposal of discontinued operations, net of tax	0	(4,567)
Net income	62,945	35,844
Less: Net income (loss) attributable to noncontrolling interest	(247)	3
Net income attributable to Belden stockholders	$ 63,192	$ 35,841
Weighted average number of common shares and equivalents:
Basic (in shares)	42,827	44,811
Diluted (in shares)	43,669	45,567
Basic income (loss) per share attributable to Belden stockholders:
Continuing operations (in dollars per share)	$ 1.48	$ 0.98
Discontinued operations (in dollars per share)	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	(0.10)
Net income (in dollars per share)	1.48	0.80
Diluted income (loss) per share attributable to Belden stockholders:
Continuing operation (in dollars per share)	1.45	0.97
Discontinued operations (in dollars per share)	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	(0.10)
Net income (in dollars per share)	$ 1.45	$ 0.79
Comprehensive income attributable to Belden	$ 45,892	$ 39,769
Common stock dividends declared per share (usd per share)	$ 0.05	$ 0.05