Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 956,082	$ 757,051
Other comprehensive gain (loss) attributable to Belden before reclassifications	66,160	119,343
Amounts reclassified from accumulated other comprehensive income	(1,465)	1,942
Net current period other comprehensive gain (loss) attributable to Belden	64,695	121,285
Ending balance	1,143,950	956,082
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(70,566)	(191,851)
Ending balance	(5,871)	(70,566)
Foreign Currency Translation Component
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(41,468)	(131,181)
Other comprehensive gain (loss) attributable to Belden before reclassifications	42,531	90,690
Amounts reclassified from accumulated other comprehensive income	(3,007)	(977)
Net current period other comprehensive gain (loss) attributable to Belden	39,524	89,713
Ending balance	(1,944)	(41,468)
Pension and Other Postretirement Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(29,098)	(60,670)
Other comprehensive gain (loss) attributable to Belden before reclassifications	23,629	28,653
Amounts reclassified from accumulated other comprehensive income	1,542	2,919
Net current period other comprehensive gain (loss) attributable to Belden	25,171	31,572
Ending balance	$ (3,927)	$ (29,098)