Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 119,217	$ 108,413	$ 331,212	$ 315,467
Cost of products sold	79,874	74,922	226,798	215,255
GROSS PROFIT	39,343	33,491	104,414	100,212
Costs and expenses
Selling	9,410	8,965	26,868	27,297
General and administrative	13,275	11,655	38,486	33,859
Research and engineering	4,240	3,706	12,809	11,013
Other operating expense - net	775	1,150	1,447	2,950
Total costs and expenses	27,700	25,476	79,610	75,119
OPERATING INCOME	11,643	8,015	24,804	25,093
Other income (expense)
Interest income	211	111	613	340
Interest expense	(735)	(364)	(1,688)	(992)
Other income - net	138	94	306	267
Total other income (expense)	(386)	(159)	(769)	(385)
INCOME BEFORE INCOME TAXES	11,257	7,856	24,035	24,708
Income tax expense (benefit)	3,213	(1,198)	6,302	3,390
NET INCOME	8,044	9,054	17,733	21,318
Less: Net income attributable to noncontrolling interests	93	0	54	0
NET INCOME ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS	$ 7,951	$ 9,054	$ 17,679	$ 21,318
AVERAGE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING:
Basic	5,024	5,025	5,039	5,038
Diluted	5,119	5,138	5,077	5,088
EARNINGS PER SHARE OF COMMON STOCK ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS:
Basic	$ 1.58	$ 1.80	$ 3.51	$ 4.23
Diluted	$ 1.55	$ 1.76	$ 3.48	$ 4.19