Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 64,317	$ (55,058)	$ (376,776)
Foreign currency translation, net of tax	88,290	(112,562)	24,121
Adjustments to pension and postretirement liability, net of tax	31,572	(15,477)	(12,168)
Other comprehensive income (loss), net of tax	119,862	(128,039)	11,953
Comprehensive income (loss)	184,179	(183,097)	(364,823)
Less: Comprehensive income (loss) attributable to noncontrolling interest	(1,031)	498	703
Comprehensive income (loss) attributable to Belden	$ 185,210	$ (183,595)	$ (365,526)