Income Per Share - Schedule of Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Income from continuing operations	$ 198,414	$ 242,556	$ 267,748
Less: Net income (loss) attributable to noncontrolling interest	(19)	(203)	159
Income from continuing operations attributable to Belden common stockholders	198,433	242,759	267,589
Add: Loss from discontinued operations, net of tax	0	0	(3,685)
Add: Loss on disposal of discontinued operations, net of tax	0	0	(9,241)
Net income attributable to Belden common stockholders	$ 198,433	$ 242,759	$ 254,663
Denominator:
Weighted average shares outstanding, basic (in shares)	40,694	42,237	43,845
Effect of dilutive common stock equivalents (in shares)	605	622	692
Weighted average shares outstanding, diluted (in shares)	41,299	42,859	44,537