Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Comprehensive Income Net Of Tax [Abstract]
Net income	$ 7,177	$ 3,653
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(4,829)	(16,881)
Recognized net actuarial gain (net of tax provision of $35 and $31 for the three months ended March 31, 2021 and 2020, respectively).	114	98
Other comprehensive loss, net of tax	(4,715)	(16,783)
Comprehensive loss attributable to noncontrolling interests	2	45
Comprehensive income (loss) attributable to Preformed Line Products Company shareholders	$ 2,464	$ (13,085)