Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenues	$ 2,460,979	$ 2,512,084	$ 2,606,485
Cost of sales	(1,538,757)	(1,557,118)	(1,690,196)
Gross profit	922,222	954,966	916,289
Selling, general and administrative expenses	(494,603)	(492,702)	(448,636)
Research and development expenses	(112,365)	(116,427)	(104,350)
Amortization of intangibles	(48,794)	(40,375)	(37,860)
Gain on sale of assets	0	12,056	37,891
Operating income	266,460	317,518	363,334
Interest expense, net	(38,303)	(33,625)	(43,554)
Loss on debt extinguishment	0	0	(6,392)
Non-operating pension benefit (cost)	(215)	1,863	4,005
Income from continuing operations before taxes	227,942	285,756	317,393
Income tax expense	(29,528)	(43,200)	(49,645)
Income from continuing operations	198,414	242,556	267,748
Loss from discontinued operations, net of tax	0	0	(3,685)
Loss from disposal of discontinued operations, net of tax	0	0	(9,241)
Net income	198,414	242,556	254,822
Less: Net income (loss) attributable to noncontrolling interest	(19)	(203)	159
Net income attributable to Belden common stockholders	$ 198,433	$ 242,759	$ 254,663
Weighted average number of common shares and equivalents:
Basic (in shares)	40,694	42,237	43,845
Diluted (in shares)	41,299	42,859	44,537
Basic income (loss) per share attributable to Belden common stockholders:
Continuing operations (in dollars per share)	$ 4.88	$ 5.75	$ 6.10
Discontinued operations (in dollars per share)	0	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	0	(0.21)
Net income (in dollars per share)	4.88	5.75	5.81
Diluted income (loss) per share attributable to Belden common stockholders:
Continuing operation (in dollars per share)	4.80	5.66	6.01
Discontinued operations (in dollars per share)	0	0	(0.08)
Disposal of discontinued operations (in dollars per share)	0	0	(0.21)
Net income (in dollars per share)	$ 4.80	$ 5.66	$ 5.72