Statements of Consolidated Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 517,417	$ 466,449	$ 444,861
Cost of products sold	351,175	312,436	304,266
GROSS PROFIT	166,242	154,013	140,595
Costs and expenses
Selling	40,539	35,637	36,609
General and administrative	55,257	56,335	51,806
Research and engineering	19,188	17,625	17,187
Other operating expenses - net	3,709	4,209	2,366
Total costs and expenses	118,693	113,806	107,968
OPERATING INCOME	47,549	40,207	32,627
Other income (expense)
Interest income	169	259	783
Interest expense	(2,023)	(2,396)	(2,217)
Other income - net	3,201	2,501	265
Total other income (expense)	1,347	364	(1,169)
INCOME BEFORE INCOME TAXES	48,896	40,571	31,458
Income tax expense	13,175	10,810	8,122
NET INCOME	35,721	29,761	23,336
Net loss (income) attributable to noncontrolling interests	8	42	(33)
NET INCOME ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS	$ 35,729	$ 29,803	$ 23,303
AVERAGE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING:
Basic	4,907	4,923	5,031
Diluted	4,970	4,984	5,087
EARNINGS PER SHARE OF COMMON STOCK ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS:
Basic	$ 7.28	$ 6.05	$ 4.63
Diluted	$ 7.19	$ 5.98	$ 4.58