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, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,143,950	$ 956,082
Other comprehensive income (loss) attributable to Belden before reclassifications	(34,127)	66,160
Amounts reclassified from accumulated other comprehensive income	(1,281)	(1,465)
Net current period other comprehensive income (loss) attributable to Belden	(35,408)	64,695
Ending balance	1,166,302	1,143,950
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,871)	(70,566)
Ending balance	(41,279)	(5,871)
Foreign Currency Translation Component
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,944)	(41,468)
Other comprehensive income (loss) attributable to Belden before reclassifications	(24,431)	42,531
Amounts reclassified from accumulated other comprehensive income	(139)	(3,007)
Net current period other comprehensive income (loss) attributable to Belden	(24,570)	39,524
Ending balance	(26,514)	(1,944)
Pension and Other Postretirement Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(3,927)	(29,098)
Other comprehensive income (loss) attributable to Belden before reclassifications	(9,696)	23,629
Amounts reclassified from accumulated other comprehensive income	(1,142)	1,542
Net current period other comprehensive income (loss) attributable to Belden	(10,838)	25,171
Ending balance	$ (14,765)	$ (3,927)