Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 138,223	$ 117,553
Cost of products sold	96,272	77,361
GROSS PROFIT	41,951	40,192
Costs and expenses
Selling	10,661	9,601
General and administrative	16,309	14,394
Research and engineering	4,774	4,611
Other operating expense - net	756	818
Total costs and expenses	32,500	29,424
OPERATING INCOME	9,451	10,768
Other income (expense)
Interest income	113	21
Interest expense	(526)	(463)
Other income - net	5,103	228
Total other income (expense)	4,690	(214)
INCOME BEFORE INCOME TAXES	14,141	10,554
Income tax expense	1,840	3,377
NET INCOME	12,301	7,177
Net (gain) loss attributable to noncontrolling interests	(16)	2
NET INCOME ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS	$ 12,285	$ 7,179
AVERAGE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING:
Basic	4,928	4,917
Diluted	4,943	4,936
EARNINGS PER SHARE OF COMMON STOCK ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS:
Basic	$ 2.49	$ 1.46
Diluted	$ 2.49	$ 1.45