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Acquisitions - Schedule of Pro Forma Information (Details) - Precision Acquisition - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Business Combination [Line Items]
Revenues	$ 636,138	$ 1,210,852
Net income attributable to Belden stockholders	$ 46,626	$ 82,018
Diluted income per share attributable to Belden stockholders (in usd per share)	$ 1.13	$ 1.98

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