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Statements of Consolidated Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive Income Net Of Tax [Abstract]
Net income	$ 29,761	$ 23,336	$ 26,581
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	3,835	2,028	(12,285)
Recognized net actuarial gains	363	397	386
Loss on unfunded pension obligations	(1,396)	(195)	(244)
Other comprehensive income (loss), net of tax	2,802	2,230	(12,143)
Less: Comprehensive income attributable to noncontrolling interests	42	(33)	0
Comprehensive income attributable to Preformed Line Products Company shareholders	$ 32,605	$ 25,533	$ 14,438

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