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Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Comprehensive Income Net Of Tax [Abstract]        
Net income $ 8,891 $ 10,488 $ 16,068 $ 14,141
Other comprehensive income (loss), net of tax        
Foreign currency translation adjustment 4,311 5,472 (518) (11,409)
Recognized net actuarial gain (net of tax provision of $35 and $39 for the three months ended June 30, 2021 and 2020, respectively). Recognized net actuarial gain (net of tax provision of $70 for both six-month periods ended June 30, 2021 and 2020). 113 91 227 189
Other comprehensive gain (loss), net of tax 4,424 5,563 (291) (11,220)
Comprehensive (loss) gain attributable to noncontrolling interests (22) (7) (20) 38
Comprehensive income attributable to Preformed Line Products Company shareholders $ 13,293 $ 16,044 $ 15,757 $ 2,959