Preformed Line Products (PLPC) 10-Q 30 Jul 21 2021 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 26, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Trading Symbol	PLPC
Entity Registrant Name	Preformed Line Products Company
Entity Central Index Key	0000080035
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		4,906,559
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	0-31164
Entity Tax Identification Number	34-0676895
Entity Address, Address Line One	660 Beta Drive
Entity Address, City or Town	Mayfield Village
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44143
City Area Code	440
Local Phone Number	461-5200
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Common stock, par value $2.00 per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	OH
Entity Interactive Data Current	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 33,454	$ 45,175
Accounts receivable, less allowances of $3,605 ($3,464 in 2020)	104,674	92,686
Inventories - net	105,428	97,537
Prepaids	10,169	15,289
Prepaid taxes	1,728	2,371
Other current assets	3,149	3,256
TOTAL CURRENT ASSETS	258,602	256,314
Property, plant and equipment - net	148,511	125,965
Operating lease, right-of-use assets	13,414	13,139
Intangibles - net	13,655	14,443
Goodwill	29,316	29,508
Deferred income taxes	9,191	10,863
Other assets	10,720	10,855
TOTAL ASSETS	483,409	461,087
LIABILITIES AND SHAREHOLDERS’ EQUITY
Trade accounts payable	38,737	31,646
Notes payable to banks	14,661	17,428
Operating lease liabilities, current	2,108	2,240
Current portion of long-term debt	6,717	5,216
Accrued compensation and amounts withheld from employees	19,950	14,736
Accrued expenses and other liabilities	18,412	17,508
Accrued profit-sharing and other benefits	5,022	8,252
Dividends payable	1,222	1,292
Income taxes payable	617	5,456
TOTAL CURRENT LIABILITIES	107,446	103,774
Long-term debt, less current portion	42,066	33,333
Unfunded pension obligation	5,218	5,826
Operating lease liabilities, non-current	9,202	8,743
Deferred income taxes	2,817	2,921
Other noncurrent liabilities	13,017	14,421
Shareholders’ equity:
Common shares - $2 par value per share, 15,000,000 shares authorized, 4,906,559 and 4,902,233 issued and outstanding, at June 30, 2021 and December 31, 2020, respectively	13,170	13,028
Common shares issued to rabbi trust, 262,181 and 265,508 shares at June 30, 2021 and December 31, 2020, respectively	(10,850)	(10,940)
Deferred compensation liability	10,850	10,940
Paid-in capital	45,564	43,134
Retained earnings	393,032	379,035
Treasury shares, at cost, 1,678,317 and 1,611,927 shares at June 30, 2021 and December 31, 2020, respectively	(93,292)	(88,568)
Accumulated other comprehensive loss	(54,842)	(54,551)
TOTAL PREFORMED LINE PRODUCTS, COMPANY SHAREHOLDERS’ EQUITY	303,632	292,078
Noncontrolling interest	11	(9)
TOTAL SHAREHOLDERS’ EQUITY	303,643	292,069
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 483,409	$ 461,087

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Accounts receivable, less allowances	$ 3,605	$ 3,464
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	4,906,559	4,902,233
Common stock, shares outstanding	4,906,559	4,902,233
Common stock, shares issued to rabbi trust	262,181	265,508
Treasury stock shares	1,678,317	1,611,927

Statements of Consolidated Inco

Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 133,038	$ 117,629	$ 250,591	$ 220,481
Cost of products sold	89,999	78,063	167,360	148,005
GROSS PROFIT	43,039	39,566	83,231	72,476
Costs and expenses
Selling	10,099	8,439	19,701	17,344
General and administrative	13,770	12,432	28,164	25,865
Research and engineering	4,763	4,113	9,374	8,408
Other operating expense - net	1,669	(225)	2,486	1,408
Total costs and expenses	30,301	24,759	59,725	53,025
OPERATING INCOME	12,738	14,807	23,506	19,451
Other income (expense)
Interest income	26	79	47	190
Interest expense	(457)	(719)	(920)	(1,428)
Other income (expense) - net	270	(282)	498	776
Total other income (expense)	(161)	(922)	(375)	(462)
INCOME BEFORE INCOME TAXES	12,577	13,885	23,131	18,989
Income tax expense	3,686	3,397	7,063	4,848
NET INCOME	8,891	10,488	16,068	14,141
Net loss attributable to noncontrolling interests	(22)	(7)	(20)	38
NET INCOME ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS	$ 8,869	$ 10,481	$ 16,048	$ 14,179
AVERAGE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING:
Basic	4,912	4,966	4,914	4,987
Diluted	4,930	4,973	4,935	4,994
EARNINGS PER SHARE OF COMMON STOCK ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS:
Basic	$ 1.81	$ 2.11	$ 3.27	$ 2.84
Diluted	$ 1.80	$ 2.11	$ 3.25	$ 2.84

Statements of Consolidated Comp

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

Statements of Consolidated Co_2

Statements of Consolidated Comprehensive Income (Loss) (Unaudited) (Parenthetical) - 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 of tax provision on recognized net actuarial gain	$ 35	$ 39	$ 70	$ 70

Statements of Consolidated Cash

Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net income		$ 16,068	$ 14,141
Adjustments to reconcile net income to net cash provided by (used in) operations:
Depreciation and amortization		6,832	6,661
Provision for accounts receivable allowances		1,046	678
Provision for inventory reserves		1,033	1,001
Deferred income taxes		1,575	677
Share-based compensation expense		1,927	1,588
Gain on sale of property and equipment		(30)	0
Other - net		318	(330)
Changes in operating assets and liabilities
Accounts receivable		(13,446)	(15,713)
Inventories		(9,470)	(4,780)
Prepaid expenses		5,758	(121)
Trade accounts payable and accrued liabilities		9,040	4,710
Income taxes - net		(4,815)	95
Other - net		(1,775)	577
NET CASH PROVIDED BY OPERATING ACTIVITIES		14,061	9,184
INVESTING ACTIVITIES
Capital expenditures	[1]	(7,338)	(11,820)
Proceeds from the sale of property and equipment	[1]	23	0
NET CASH USED IN INVESTING ACTIVITIES	[1]	(7,315)	(11,820)
FINANCING ACTIVITIES
(Decrease) increase in notes payable to banks	[1]	(2,183)	5,148
Proceeds from long-term debt	[1]	42,954	41,163
Payments of long-term debt	[1]	(53,029)	(36,717)
Dividends paid	[1]	(2,114)	(2,173)
Proceeds from issuance of common shares	[1]	364	266
Purchase of common shares for treasury	[1]	(176)	(4,613)
Purchase of common shares for treasury from related parties	[1]	(4,548)	(2,378)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	[1]	(18,732)	696
Effects of exchange rate changes on cash and cash equivalents		265	(817)
Net decrease in cash, cash equivalents and restricted cash		(11,721)	(2,757)
Cash, cash equivalents and restricted cash at beginning of year		45,175	39,263
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD		$ 33,454	$ 36,506
[1]	Non-cash investing and financing activities:  The Company purchased a new corporate aircraft during six-month period ended June 30, 2021 with a term loan in the principal amount of $20.5 million.  For further information regarding this transaction, refer to Note P, “Debt Arrangements.

Statements of Consolidated Ca_2

Statements of Consolidated Cash Flows (Unaudited) (Parenthetical) $ in Millions	6 Months Ended
	Jun. 30, 2021USD ($)
Corporate Aircraft [Member]
Non cash term loan	$ 20.5

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	NOTE A – BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements of Preformed Line Products Company and subsidiaries (the “Company” or “PLPC”) have been prepared in accordance with United States of America (U.S.) generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. The preparation of these consolidated financial statements requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from these estimates. In the opinion of management, these consolidated financial statements contain all estimates and adjustments, consisting of normal recurring accruals, required to fairly present the financial position, results of operations, and cash flows for the interim periods. Operating results for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the full-year ending December 31, 2021. Noncontrolling interests are presented in the Company’s consolidated financial statements as if parent company investors (controlling interests) and other minority investors (noncontrolling interests) in partially-owned subsidiaries have similar economic interests in a single entity. As a result, investments in noncontrolling interests are reported as equity in the Company’s consolidated financial statements. Additionally, the Company’s consolidated financial statements include 100% of a controlled subsidiary’s earnings, rather than only its share. Transactions between the parent company and noncontrolling interests are reported in equity as transactions between stockholders, provided that these transactions do not create a change in control. The Consolidated Balance Sheet at December 31, 2020 has been derived from the audited consolidated financial statements but does not include all of the information and notes required by U.S. GAAP for complete financial statements. For further information, refer to the consolidated financial statements and notes to consolidated financial statements included in the Company’s 2020 Annual Report on Form 10-K filed on March 5, 2021 with the Securities and Exchange Commission.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2021
Revenue From Contract With Customer [Abstract]
Revenue	NOTE B – REVENUE Revenue recognition Net sales include products and shipping and handling charges, net of estimates for product returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products. All revenue is recognized when the Company satisfies the performance obligations under the contract and control of the product is transferred to the customer, primarily based on shipping terms. Revenue for shipping and handling charges are recognized at the time the products are shipped to, delivered to or picked up by the customer. The Company estimates product returns based on historical return rates. Disaggregated revenue The Company’s revenues by segment and product type are as follows: Three Months Ended June 30, 2021 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 61 % 65 % 51 % 65 % 60 % Communications 35 31 44 3 30 Special Industries 4 4 5 32 10 Total 100 % 100 % 100 % 100 % 100 % Three Months Ended June 30, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 65 % 78 % 60 % 74 % 68 % Communications 30 18 33 4 23 Special Industries 5 4 7 22 9 Total 100 % 100 % 100 % 100 % 100 % Six Months Ended June 30, 2021 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 59 % 70 % 55 % 67 % 61 % Communications 36 26 39 5 30 Special Industries 5 4 6 28 9 Total 100 % 100 % 100 % 100 % 100 % Six Months Ended June 30, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 64 % 76 % 57 % 74 % 67 % Communications 30 18 35 4 24 Special Industries 6 6 8 22 9 Total 100 % 100 % 100 % 100 % 100 %

Other Financial Statement Infor

Other Financial Statement Information	6 Months Ended
	Jun. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Other Financial Statement Information	NOTE C – OTHER FINANCIAL STATEMENT INFORMATION Inventories – net June 30, 2021 December 31, 2020 Raw materials $ 60,987 $ 53,947 Work-in-process 10,654 9,272 Finished Goods 40,065 38,801 111,706 102,020 Excess of current cost over LIFO cost (6,278 ) (4,483 ) Net Inventory $ 105,428 $ 97,537 Cost of inventories for certain material is determined using the last-in-first-out (LIFO) method and totaled approximately $32.4 million at June 30, 2021 and $32.0 million at December 31, 2020. An actual valuation of inventories under the LIFO method can be made only at the end of the year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs. Because these estimates are subject to change and may be different than the actual inventory levels and costs at the end of the year, interim results are subject to the final year-end LIFO inventory valuation. During the three and six-month periods ended June 30, 2021, the net change in LIFO inventories resulted in expense of $1.3 million and $1.8 million, respectively, to Income before income taxes. During the three and six-month periods ended June 30, 2020, the net change in LIFO inventories resulted in expense of less than $.1 million and $.2 million, respectively, to Income before income taxes. Property, plant and equipment—net Major classes of Property, plant and equipment are stated at cost and were as follows: June 30, 2021 December 31, 2020 Land and improvements $ 21,875 $ 22,132 Buildings and improvements 100,377 97,909 Machinery, equipment and aircraft 199,447 176,377 Construction in progress 12,577 9,563 334,276 305,981 Less accumulated depreciation (185,765 ) (180,016 ) $ 148,511 $ 125,965 Legal proceedings The Company can be party to a variety of pending legal proceedings and claims arising in the normal course of business, including, but not limited to, litigation relating to employment, workers’ compensation, product liability, environmental and intellectual property. The Company has liability insurance to cover many of these claims. Although the outcomes of these matters are not predictable with certainty, the Company records a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. In the event the Company determines that a loss is not probable, but is reasonably possible, and the likelihood to develop what the Company believes to be a reasonable range of potential loss exists, the Company will include disclosure related to such matters. To the extent that there is a reasonable possibility the losses could exceed amounts already accrued, the Company will adjust the accrual in the period in which the determination is made, disclose an estimate of the additional loss or range of loss and if the amount of such adjustment cannot be reasonably estimated, disclose that an estimate cannot be made. As of June 30, 2021 and December 31, 2020, the Company has accrued approximately $2.2 million, representing its best estimate for losses to be incurred on a variety of global legal matters. The Company and its subsidiaries Helix Uniformed Ltd. (“Helix”) and Preformed Line Products (Canada) Limited (“PLPC Canada”), were each named, jointly and severally, with each of SNC-Lavalin ATP, Inc. (“SNC ATP”), HD Supply Canada Inc., by its trade names HD Supply Power Solutions and HD Supply Utilities (“HD Supply”), and Anixter Power Solutions Canada Inc. (the corporate successor to HD Supply), “Anixter” and, together with the Company, PLPC Canada, Helix, SNC ATP and HD Supply, the (“Defendants”) in a complaint filed by Altalink, L.P. (the “Plaintiff”) in the Court of Queen’s Bench of Alberta in Alberta, Canada in November 2016 (the “Complaint”). The Complaint states that Plaintiff engaged SNC ATP to design, engineer, procure and construct numerous power distribution and transmission facilities in Alberta (the “Projects”) and that through SNC ATP and HD Supply (now Anixter), spacer dampers manufactured by Helix were procured and installed in the Projects. The Complaint alleges that the spacer dampers have and may continue to become loose, open and detach from the conductors, resulting in damage and potential injury and a failure to perform the intended function of providing spacing and damping to the Project. The Plaintiffs are seeking an estimated $56.0 million Canadian dollars in damages jointly and severally from the Defendants, representing the costs of monitoring and replacing the spacer dampers and remediating property damage, due to alleged defects in the design and construction of, and supply of materials for, the Projects by SNC ATP and HD Supply/Anixter and in the design of the spacer dampers by Helix. The Company believes the claims against it are without merit and intends to vigorously defend against such claims. The Company is unable to predict the outcome of this case, however, it has recorded a reserve for the low end of the range for potential loss associated with this matter. If this matter is concluded in a manner adverse to the Company, it could have a material effect on the Company’s financial results. The Company is not a party to any other pending legal proceedings that the Company believes would, individually or in the aggregate, have a material adverse effect on its financial condition, results of operations or cash flows.

Shareholders Equity

Shareholders Equity	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Shareholders Equity	NOTE D – SHAREHOLDERS EQUITY The following table reflects the changes in shareholders equity for the six months ended June 30, 2021 and 2020: Accumulated Other Comprehensive Income (Loss) Common Shares Common Shares Issued to Rabbi Trust Deferred Compensation Liability Paid in Capital Retained Earnings Treasury Shares Cumulative Translation Adjustment Unrecognized Pension Benefit Cost Total Preformed Line Products Company Equity Noncontrolling Interests Total Equity (In thousands, except share and per share data) Balance at December 31, 2020 $ 13,028 $ (10,940 ) $ 10,940 $ 43,134 $ 379,035 $ (88,568 ) $ (47,847 ) $ (6,704 ) $ 292,078 $ (9 ) $ 292,069 Net income (loss) 7,179 7,179 (2 ) 7,177 Foreign currency translation adjustment (4,829 ) (4,829 ) (4,829 ) Recognized net actuarial gain, net of tax provision of $35 114 114 114 Total comprehensive income 2,464 (2 ) 2,462 Share-based compensation 1,034 (40 ) 994 994 Purchase of 52,590 common shares (3,678 ) (3,678 ) (3,678 ) Issuance of 63,316 common shares 127 270 397 397 Common shares distributed from rabbi trust of 3,727, net 120 (120 ) 0 0 Cash dividends declared - $.20 per share (116 ) (990 ) (1,106 ) (1,106 ) Balance at March 31, 2021 $ 13,155 $ (10,820 ) $ 10,820 $ 44,322 $ 385,184 $ (92,246 ) $ (52,676 ) $ (6,590 ) $ 291,149 $ (11 ) $ 291,138 Net income (loss) 8,869 8,869 22 8,891 Foreign currency translation adjustment 4,311 4,311 4,311 Recognized net actuarial gain, net of tax provision of $35 113 113 113 Total comprehensive income 13,293 22 13,315 Share-based compensation 893 (40 ) 853 853 Purchase of 13,800 common shares (1,046 ) (1,046 ) (1,046 ) Issuance of 7,400 common shares 15 349 364 364 Common shares issued to rabbi trust of 400, net (30 ) 30 0 0 Cash dividends declared - $.20 per share (981 ) (981 ) (981 ) Balance at June 30, 2021 $ 13,170 $ (10,850 ) $ 10,850 $ 45,564 $ 393,032 $ (93,292 ) $ (48,365 ) $ (6,477 ) $ 303,632 $ 11 $ 303,643 Accumulated Other Comprehensive Income (Loss) Common Shares Common Shares Issued to Rabbi Trust Deferred Compensation Liability Paid in Capital Retained Earnings Treasury Shares Cumulative Translation Adjustment Unrecognized Pension Benefit Cost Total Preformed Line Products Company Equity Noncontrolling Interests Total Equity (In thousands, except share and per share data) Balance at December 31, 2019 $ 12,848 $ (10,981 ) $ 10,981 $ 38,854 $ 353,292 $ (79,106 ) $ (51,682 ) $ (5,671 ) $ 268,535 $ 33 $ 268,568 Net income (loss) 3,698 3,698 (45 ) 3,653 Foreign currency translation adjustment (16,881 ) (16,881 ) (16,881 ) Recognized net actuarial gain, net of tax provision of $31 98 98 98 Total comprehensive income (13,085 ) (45 ) (13,130 ) Share-based compensation 976 (43 ) 933 933 Purchase of 75,246 common shares (3,980 ) (3,980 ) (3,980 ) Issuance of 77,381 common shares 155 155 155 Common shares distributed from rabbi trust of 3,358, net 101 (101 ) 0 0 Cash dividends declared - $.20 per share (83 ) (963 ) (1,046 ) (1,046 ) Balance at March 31, 2020 $ 13,003 $ (10,880 ) $ 10,880 $ 39,747 $ 355,984 $ (83,086 ) $ (68,563 ) $ (5,573 ) $ 251,512 $ (12 ) $ 251,500 Net income 10,481 10,481 7 10,488 Foreign currency translation adjustment 5,472 5,472 5,472 Recognized net actuarial gain, net of tax provision of $31 91 91 91 Total comprehensive income 16,044 7 16,051 Share-based compensation 612 (26 ) 586 586 Purchase of 29,724 common shares (3,011 ) (3,011 ) (3,011 ) Issuance of 525 common shares 26 26 26 Common shares distributed from rabbi trust of 525, net (30 ) 30 0 0 Cash dividends declared - $.20 per share (996 ) (996 ) (996 ) Balance at June 30, 2020 $ 13,003 $ (10,910 ) $ 10,910 $ 40,385 $ 365,443 $ (86,097 ) $ (63,091 ) $ (5,482 ) $ 264,161 $ (5 ) $ 264,156

Pension Plans

Pension Plans	6 Months Ended
	Jun. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Pension Plans	NOTE E – PENSION PLANS The Company uses a December 31 measurement date for the Preformed Line Products Company Employees’ Retirement Plan (the “Plan”). Net periodic pension cost for this plan included the following components: Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Service cost $ 0 $ 90 $ 0 $ 181 Interest cost 282 326 564 653 Expected return on plan assets (586 ) (556 ) (1,172 ) (1,113 ) Recognized net actuarial loss 149 130 298 259 Net periodic pension cost (benefit) $ (155 ) $ (10 ) $ (310 ) $ (20 ) There were no contributions to the Plan during the six months ended June 30, 2021. The Company does not plan to contribute additional funds to the Plan during the remainder of 2021.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income ("AOCI")	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income ("AOCI")	NOTE F – ACCUMULATED OTHER COMPREHENSIVE INCOME (“AOCI”) The following tables set forth the total changes in AOCI by component, net of tax: Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Unrecognized pension benefit cost Currency Translation Adjustment Total Unrecognized pension benefit cost Currency Translation Adjustment Total Balance at April 1 $ (6,590 ) $ (52,676 ) $ (59,266 ) $ (5,573 ) $ (68,563 ) $ (74,136 ) Other comprehensive income before reclassifications: Gain on foreign currency translation adjustment 0 4,311 4,311 0 5,472 5,472 Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial gain (a) 113 0 113 91 0 91 Net current period other comprehensive income 113 4,311 4,424 91 5,472 5,563 Balance at June 30 $ (6,477 ) $ (48,365 ) $ (54,842 ) $ (5,482 ) $ (63,091 ) $ (68,573 ) Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 Defined pension plan activity Currency Translation Adjustment Total Defined benefit pension plan activity Currency Translation Adjustment Total Balance at January 1 $ (6,704 ) $ (47,847 ) $ (54,551 ) $ (5,671 ) $ (51,682 ) $ (57,353 ) Other comprehensive loss before reclassifications: Loss on foreign currency translation adjustment 0 (518 ) (518 ) 0 (11,409 ) (11,409 ) Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial gain (a) 227 0 227 189 0 189 Net current period other comprehensive income (loss) 227 (518 ) (291 ) 189 (11,409 ) (11,220 ) Balance at June 30 $ (6,477 ) $ (48,365 ) $ (54,842 ) $ (5,482 ) $ (63,091 ) $ (68,573 ) (a) This AOCI component is included in the computation of net periodic pension costs.

Computation of Earnings Per Sha

Computation of Earnings Per Share	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Computation of Earnings Per Share	NOTE G – COMPUTATION OF EARNINGS PER SHARE Basic earnings per share were computed by dividing Net income by the weighted-average number of common shares outstanding for each respective period. Diluted earnings per share were calculated by dividing Net income by the weighted-average of all potentially dilutive common stock that was outstanding during the periods presented. The calculation of basic and diluted earnings per share for the three and six-month periods ended June 30, 2021 and 2020 was as follows: Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Numerator Net income $ 8,869 $ 10,481 $ 16,048 $ 14,179 Denominator Determination of shares Weighted-average common shares outstanding 4,912 4,966 4,914 4,987 Dilutive effect - share-based awards 18 7 21 7 Diluted weighted-average common shares outstanding 4,930 4,973 4,935 4,994 Earnings per common share Basic $ 1.81 $ 2.11 $ 3.27 $ 2.84 Diluted $ 1.80 $ 2.11 $ 3.25 $ 2.84 For the three and six-month periods ended June 30, 2021, 0 and 10,000 stock options, respectively, were excluded from the calculation of diluted earnings per share as the effect would have been anti-dilutive. For the three and six-month periods ended June 30, 2020, 40,313 and 30,157 stock options, respectively, were excluded from the calculation of diluted earnings per share as the effect would have been anti-dilutive.

Goodwill and Other Intangibles

Goodwill and Other Intangibles	6 Months Ended
	Jun. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	NOTE H – GOODWILL AND OTHER INTANGIBLES The Company’s finite and indefinite-lived intangible assets consist of the following: June 30, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Finite-lived intangible assets Patents $ 4,813 $ (4,806 ) $ 4,806 $ (4,806 ) Land use rights 1,346 (442 ) 1,286 (396 ) Trademarks 1,872 (1,509 ) 1,756 (1,474 ) Technology 7,593 (2,657 ) 7,673 (2,402 ) Customer relationships 16,399 (8,954 ) 16,441 (8,441 ) $ 32,023 $ (18,368 ) $ 31,962 $ (17,519 ) Indefinite-lived intangible assets Goodwill $ 29,316 $ 29,508 The aggregate amortization expense for other intangibles with finite lives for the three and six-month periods ended June 30, 2021 was $.5 million and $.9 million, respectively. The aggregate amortization expense for other intangibles with finite lives for the three and six-month periods ended June 30, 2020 was $.4 million and $.9 million, respectively. Amortization expense is estimated to be $.8 million for the remainder of 2021, $1.7 million for 2022 and 2023, $1.6 million for 2024 and $1.4 million for 2025. The combined weighted-average remaining amortization period is approximately 12.1 years. The weighted-average remaining amortization period by intangible asset class is as follows: patents, 0 years; land use rights, 55.0 years; trademarks, 6.4 years; technology, 9.6 years; and customer relationships, 9.1 years. The Company’s measurement date for its annual impairment test for goodwill is October 1st of each year. The Company performs its annual impairment test for goodwill utilizing a discounted cash flow methodology, market comparables, and an overall market capitalization reasonableness test in computing fair value by reporting unit. The Company then compares the fair value of the reporting unit to its carrying value to assess if goodwill has been impaired. Based on the assumptions as to growth, discount rates and the weighting used for each respective valuation methodology, results of the valuations could be significantly different. However, the Company believes that the methodologies and weightings used are reasonable and result in appropriate fair values of the reporting units. The Company’s valuation method uses Level 3 inputs under the fair value hierarchy. As of the Company’s most recent annual impairment assessment date, the Asia-Pacific reporting unit’s fair value exceeded carrying value by approximately 15%. Accordingly, the reporting unit is potentially at risk of impairment in the future if there is a continued negative impact on the long-term outlook resulting from the continued effects of the COVID-19 pandemic or other factors such as a postponement of government capital spending. Total goodwill associated with this reporting unit was $7.6 million at June 30, 2021. The Company’s only intangible asset with an indefinite life is goodwill. The changes in the carrying amount of goodwill, by segment, for the six months ended June 30, 2021 are as follows: USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2021 $ 3,078 $ 4,251 $ 14,449 $ 7,730 $ 29,508 Currency translation 0 159 (227 ) (124 ) (192 ) Balance at June 30, 2021 $ 3,078 $ 4,410 $ 14,222 $ 7,606 $ 29,316

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	NOTE I – SHARE-BASED COMPENSATION Long Term Incentive Plan of 2008 and 2016 Incentive Plan The Company maintains an equity award program to give the Company a competitive advantage in attracting, retaining, and motivating officers, employees and directors and to provide an incentive to those individuals to increase shareholder value through long-term incentives directly linked to the Company’s performance. Under the Preformed Line Products Company Long Term Incentive Plan of 2008 (the “LTIP”), certain employees, officers, and directors were eligible to receive awards of options, restricted shares and restricted share units (RSUs). The total number of Company common shares reserved for awards under the LTIP was 900,000, of which 800,000 common shares were reserved for RSUs and 100,000 common shares have been reserved for share options. The LTIP was terminated and replaced with the Preformed Line Products Company 2016 Incentive Plan (the “Incentive Plan”) in May 2016 upon approval by the Company’s Shareholders at the 2016 Annual Meeting of Shareholders on May 10, 2016. No further awards will be made under the LTIP and previously granted awards remain outstanding in accordance with their terms. Under the Incentive Plan, certain employees, officers, and directors will be eligible to receive awards of options, restricted shares and RSUs. The total number of Company common shares reserved for awards under the Incentive Plan is 1,000,000 of which 900,000 common shares have been reserved for restricted share awards and 100,000 common shares have been reserved for share options. The Incentive Plan expires on May 10, 2026. Restricted Share Units For the regular annual grants, a portion of the RSUs is subject to time-based cliff vesting and a portion is subject to vesting based upon the Company’s performance over a set period for all participants except the CEO. All of the CEO’s regular annual RSUs are subject to vesting based upon the Company’s performance over a set-year period. The RSUs are offered at no cost to the employees. The fair value of RSUs is based on the market price of a common share on the grant date and the shares underlying the awards are not issued until they vest. Dividends declared are accrued in cash. A summary of the RSUs outstanding under the LTIP for the six months ended June 30, 2021 is as follows: Restricted Share Units Performance and Service Required (1) Service Required Total Restricted Share Units Weighted-Average Grant-Date Fair Value Nonvested as of January 1, 2021 183,777 15,786 199,563 $ 60.33 Granted 51,308 12,285 63,593 71.84 Vested (56,973 ) 0 (56,973 ) 73.86 Forfeited 0 0 0 0.00 Nonvested as of June 30, 2021 178,112 28,071 206,183 $ 60.49 (1) Nonvested, performance-based RSUs are reflected above at the maximum performance achievement level with the exception of the 2021 grant, which is currently recorded at its target rate. For time-based RSUs, the Company recognizes stock-based compensation expense on a straight-line basis over the requisite service period of the award in General and administrative expense in the accompanying Statements of Consolidated Income. Compensation expense related to the time-based RSUs for three and six-month periods ended June 30, 2021 was $.1 million and $.3 million, respectively. Compensation expense related to the time-based RSUs for both three and six-month periods ended June 30, 2020 was $.1 million and $.2 million, respectively. As of June 30, 2021, there was $1.1 million of total unrecognized compensation cost related to time-based RSUs that is expected to be recognized over the weighted-average remaining period of approximately 2.1 years. For the performance-based RSUs, the number of RSUs in which the participants will vest depends on the Company’s level of performance measured by growth in either operating or pre-tax income and sales growth over a requisite performance period. Depending on the extent to which the performance criterions are satisfied under the LTIP and the Incentive Plan, the participants are eligible to earn common shares over the vesting period. Performance-based compensation expense for the three and six-month periods ended June 30, 2021 was $.8 million and $1.5 million, respectively. Performance-based compensation expense for the three and six-month periods ended June 30, 2020 was $.5 million and $1.3 million, respectively. As of June 30, 2021, the remaining compensation expense of $4.0 million for outstanding performance-based RSUs is expected to be recognized over the weighted-average period of approximately 1.8 years. In the event of a Change in Control (as defined in the LTIP and the Incentive Plan), vesting of the RSUs will be accelerated and all restrictions will lapse. Unvested performance-based awards will vest on a target potential payout. To satisfy the vesting of its RSU awards, the Company has reserved new shares from its authorized but unissued shares. Any additional awards granted will also be issued from the Company’s authorized but unissued shares. Share Option Awards The LTIP permitted and now the Incentive Plan permits the grant of 100,000 options to buy common shares of the Company to certain employees at not less than fair market value of the shares on the date of grant. Options issued to date under the LTIP and the Incentive Plan vest 50% after one year following the date of the grant, 75% after two years, and 100% after three years, and expire from five to ten years from the date of grant. Shares issued as a result of stock option exercises will be funded with the issuance of new shares. The Company utilizes the Black-Scholes option pricing model for estimating fair values of options. The Black-Scholes model requires assumptions regarding the volatility of the Company’s stock, the expected life of the stock award and the Company’s dividend yield. The Company utilizes historical data in determining these assumptions. The risk-free rate for periods within the contractual life of the option is based on the U.S. zero coupon Treasury yield in effect at the time of grant. There were no options granted during the six-month period ended June 30, 2021 and 25,500 granted during the six-month period ended June 30, 2020. Stock option activity under the Company’s LTIP for six months ended June 30, 2021 was as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (000's) Outstanding at January 1, 2021 50,950 $ 54.81 Granted 0 Exercised (7,000 ) $ 47.66 Forfeited 0 Outstanding (vested and expected to vest) at June 30, 2021 43,950 $ 55.95 6.7 $ 802 Exercisable at June 30, 2021 27,450 $ 58.91 5.5 $ 420 There were 7,000 stock option exercises during the six-month period ended June 30, 2021 and no stock option shares were exercised during the six-month period ended June 30, 2020. For the three and six-month periods ended June 30, 2021, the Company recorded compensation expense related to the stock options currently vested of less than $.1 million and $.1 million, respectively. For the each of three and six-month periods ended June 30, 2020, the Company recorded compensation expense related to the stock options currently vested of less than $.1 Deferred Compensation Plan The Company maintains a trust, commonly referred to as a rabbi trust, in connection with the Company’s deferred compensation plan. This plan allows for two deferrals. First, Directors make elective deferrals of Director fees payable and held in the rabbi trust. The deferred compensation plan allows the Directors to elect to receive Director fees in common shares of the Company at a later date instead of fees paid each quarter in cash. Second, this plan allows certain Company employees to defer restricted shares or RSUs for future distribution in the form of common shares. Assets of the rabbi trust are consolidated, and the value of the Company’s common shares held in the rabbi trust is classified in Shareholders’ equity and generally accounted for in a manner similar to treasury stock. The Company recognizes the original amount of the deferred compensation (fair value of the deferred stock award at the date of grant) as the basis for recognition in common shares issued to the rabbi trust. Changes in the fair value of amounts owed to certain employees or Directors are not recognized as the Company’s deferred compensation plan does not permit diversification and must be settled by the delivery of a fixed number of the Company’s common shares. As of June 30, 2021, 262,181 shares have been deferred and are being held in the rabbi trust.

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities	NOTE J – FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES The Company measures and records certain assets and liabilities at fair value. A fair value hierarchy is used for those assets and liabilities measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s assumptions (unobservable inputs). The hierarchy consists of the following three levels: Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets. Level 2 Inputs other than Level 1 inputs that are either directly or indirectly observable, which may include: o Quoted prices for similar assets in active markets; o Quoted prices for identical or similar assets or liabilities in inactive markets; o Inputs other than quoted prices that are observable for the asset or liability; and o Inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 Inputs to the valuation methodology are unobservable and developed using estimates and assumptions developed by the Company which reflect those that a market participant would use. The following table summarizes the Company’s assets and liabilities, recorded and measured at fair value, on the Company’s Consolidated Balance Sheets as of June 30, 2021 and December 31, 2020: Description Balance as of June 30, 2021 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Foreign currency forward contracts $ 295 $ 0 $ 295 $ 0 Total Assets $ 295 $ 0 $ 295 $ 0 Liabilities: Supplemental profit sharing plan $ 7,330 $ 0 $ 7,330 $ 0 Foreign currency forward contracts 155 0 155 0 Total Liabilities $ 7,485 $ 0 $ 7,485 $ 0 Description Balance as of December 31, 2020 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Foreign currency forward contracts $ 359 $ 0 $ 359 $ 0 Total Assets $ 359 $ 0 $ 359 $ 0 Liabilities: Supplemental profit sharing plan $ 7,143 $ 0 $ 7,143 $ 0 Foreign currency forward contracts 56 0 56 0 Total Liabilities $ 7,199 $ 0 $ 7,199 $ 0 The Company operates internationally and enters into intercompany transactions denominated in foreign currencies. Consequently, the Company is subject to market risk arising from exchange rate movements between the dates when foreign currency transactions occur and the dates they are settled. The Company currently uses foreign currency forward contracts to reduce the risk related to some of these transactions. These contracts usually have maturities of 90 days or less and generally require an exchange of foreign currencies for U.S. dollars at maturity at rates stated in the contracts. These contracts are not designated as hedging instruments under U.S. GAAP. Accordingly, the changes in the fair value of the foreign currency forward contracts are recognized in each accounting period in “Other operating expense - net” on the Consolidated Statements of Income together with the transaction gain or loss from the related balance sheet position. For the three and six-month periods ended June 30, 2021, the Company recognized net losses of $1.3 million and $.9 million, respectively, on foreign currency forward contracts. For the three and six-month periods ended June 30, 2020, the Company recognized a net loss of $.3 million and a net gain of $.9 million, respectively, on foreign currency forward contracts. T he Company has a non-qualified Supplemental Profit Sharing Plan for its executives and directors . The liability for this unfunded Supplemental Profit Sharing Plan was $ million and $ 7.1 million at June 30 , 202 1 and December 31, 20 20 , respectively . These amounts are recorded within Other noncurrent liabilities on the Company’s C onsolidated B alance S heets. The Supplemental Profit Sharing Plan allows participants the ability to hypothetically invest their proportionate award into various investment options, which primarily include mutual funds. The Company credits earnings, gains and losses to the participants’ deferred compensation account balances based on the investments selected by the participants. The Company measures the fair value of the Supplemental Profit Sharing Plan liability using the market values of the participants’ underlying investment accounts.

Recently Adopted Accounting Pro

Recently Adopted Accounting Pronouncements	6 Months Ended
	Jun. 30, 2021
Accounting Changes And Error Corrections [Abstract]
Recently Adopted Accounting Pronouncements	NOTE K – RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS In March 2020, the FASB issued Accounting Standards Update ("ASU" No. 2020-04), Reference Rate Reform (“Topic 848”). Certain amendments were provided for in ASU No. 2021-01, Reference Rate Reform (Topic 848) Scope, which was issued in January 2021. ASU 2020-04 provides temporary optional guidance to ease the financial reporting burden associated with the expected market transition from the London Inter-Bank Offer Rate ("LIBOR") to alternative reference rates. This guidance is available immediately and may be implemented in any period prior to the guidance expiration on December 31, 2022. The Company is currently assessing which of its various contracts will require an update for a new reference rate and will determine the timing for implementation of this guidance after completing that analysis. On January 1, 2021, the Company adopted Account Standards Update (ASU) 2019-12, Income Taxes (ASC 740) – Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in ASC 740 and also clarifies and amends existing guidance to improve consistent application. The adoption of ASU 2019-12 did not result in any material adjustments

New Accounting Standards to be

New Accounting Standards to be Adopted	6 Months Ended
	Jun. 30, 2021
Accounting Changes And Error Corrections [Abstract]
New Accounting Standards to be Adopted	NOTE L – NEW ACCOUNTING STANDARDS TO BE ADOPTED The Company considers the applicability and impact of all ASUs. Recently issued ASUs that are not considered were assessed and determined to be not applicable in the current reporting period.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Information	NOTE M – SEGMENT INFORMATION The following tables present a summary of the Company’s reportable segments for the three and six months ended June 30, 2021 and 2020. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profit in inventory. Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Net sales PLP-USA $ 62,087 $ 53,966 $ 118,316 $ 100,567 The Americas 18,625 17,486 36,146 34,727 EMEA 27,352 21,048 50,834 41,408 Asia-Pacific 24,974 25,129 45,295 43,779 Total net sales $ 133,038 $ 117,629 $ 250,591 $ 220,481 Intersegment sales PLP-USA $ 3,779 $ 2,129 $ 6,164 $ 5,001 The Americas 2,556 2,813 4,622 4,677 EMEA 1,421 1,156 1,932 1,622 Asia-Pacific 4,812 3,910 8,465 6,004 Total intersegment sales $ 12,568 $ 10,008 $ 21,183 $ 17,304 Income taxes PLP-USA $ 2,481 $ 2,025 $ 4,859 $ 2,871 The Americas 659 812 1,268 1,445 EMEA 409 445 854 531 Asia-Pacific 137 115 82 1 Total income taxes $ 3,686 $ 3,397 $ 7,063 $ 4,848 Net income attributable to Preformed Line Products Company shareholders PLP-USA $ 6,319 $ 6,135 $ 11,895 $ 9,686 The Americas 1,962 1,695 3,153 2,690 EMEA 1,043 2,247 2,239 2,583 Asia-Pacific (455 ) 404 (1,239 ) (780 ) Total net income attributable to Preformed Line Products Company shareholders $ 8,869 $ 10,481 $ 16,048 $ 14,179 June 30, 2021 December 31, 2020 Assets PLP-USA $ 163,557 $ 137,689 The Americas 77,422 75,438 EMEA 106,629 106,922 Asia-Pacific 135,801 141,038 Total identifiable assets $ 483,409 $ 461,087

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	NOTE N – INCOME TAXES The Company’s effective tax rate was 29% and 24% for the three-month periods ended June 30, 2021 and 2020, respectively, and 31% and 26% for the six months ended June 30, 2021 and 2020, respectively. The higher effective tax rate for the three and six months ended June 30, 2021 and 2020 compared to the U.S. federal statutory rate of 21% was primarily due to an increase in U.S. permanent items primarily related to limitations on the deductibility of executive compensation, plus adjustments due to foreign income and an increase in earnings in jurisdictions with higher tax rates than the U.S. federal statutory rate where such earnings are permanently reinvested. The effective tax rate increase for the second quarter of 2021 compared to the second quarter of 2020 is primarily due to a greater increase in pre-tax earnings along with the permanent items having a less significant change in the second quarter of 2021 compared to the second quarter of 2020. The Company provides valuation allowances against deferred tax assets when it is more likely than not that some portion or all of its deferred tax assets will not be realized. No significant changes to the valuation allowances were reflected for the periods ended June 30, 2021 or December 31, 2020. There were no significant changes to any of the balances of unrecognized tax benefits on for the six months ended June 30, 2021 or the year ended December 31, 2020.

Product Warranty Reserve

Product Warranty Reserve	6 Months Ended
	Jun. 30, 2021
Guarantees [Abstract]
Product Warranty Reserve	NOTE O – PRODUCT WARRANTY RESERVE The Company records an accrual for estimated warranty costs to Costs of products sold in the Statements of Consolidated Income. These amounts are recorded in Accrued expenses and other liabilities on the Company’s Consolidated Balance Sheets. The Company records and accounts for its warranty reserve based on specific claim incidents. Should the Company become aware of a specific potential warranty claim for which liability is probable and reasonably estimable, a specific charge is recorded and accounted for accordingly. Adjustments are made quarterly to the accruals as claim information changes. The following is a rollforward of the product warranty reserve: Six Months Ended June 30 2021 2020 Beginning of period balance $ 1,282 $ 1,309 Additions charged to income 1,325 48 Warranty usage (244 ) (28 ) Currency translation 0 (87 ) End of period balance $ 2,363 $ 1,242

Debt Arrangements

Debt Arrangements	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Debt Arrangements	NOTE P – DEBT ARRANGEMENTS On January 19, 2021, the Company received funding for a term loan from PNC Equipment Finance, LLC in the principal amount of $20.5 million to fund the purchase of a corporate aircraft. In September 2020, the Company made a deposit of $6.8 million toward the purchase of the aircraft which was subsequently refunded in January 2021 and the full amount of the $20.5 million purchase price was drawn on the loan. The aircraft replaces the Company’s previously owned aircraft, which was sold in December 2020. The proceeds of the sale were used to pay off the debt associated with the previously-owned aircraft. The term of the new loan is 120 months at a fixed interest rate of 2.744%. The loan is payable in 119 equal monthly installments, which commenced on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date. Of the $19.8 million outstanding on this debt facility at June 30, 2021, $2.1 million was classified as current. The loan is secured by the aircraft. On April 17, 2020, the Company extended the term on its $65 million credit facility from June 30, 2021 to June 30, 2024 and added its Austrian subsidiary as a borrower on the facility. All other terms remain the same, including the interest rate at LIBOR plus 1.125% unless the Company’s funded debt to Earnings before Interest, Taxes and Depreciation ratio exceeds 2.25 to 1, at which point the LIBOR spread becomes 1.500%. At June 30, 2021, the U.S. borrowed $5.9 million on the facility with a term expiring June 30, 2024. . At June 30 , 202 1 , the Company’s Polish subsidiary had borrowed $ million U.S. dollars at a rate of % plus the Warsaw Interbank Offer Rate with a term expiring June 30, 202 4 . At June 30 , 202 1 , the Company’s Australian subsidiary had borrowed $ 3.7 million U.S. dollars, also with a term expiring June 30, 202 4 . At June 30 , 2021, the Company’s Austrian subsidiary had borrowed $.6 million U.S. dollars with a term expiring June 30, 2024 . At June 30 , 202 1 , the interest rates on the U.S., Polish , Australian and Austrian line of credit agreement were %, % , % and % , respectively. Under the credit facility, at June 30 , 202 1 , the Company had utilized $ million with $ 45.2 million available under the line of credit, net of long-term outstanding letters of credit of $.1 million . The line of credit agreement contains, among other provisions, requirements for maintaining levels of net worth and profitability. At June 30 , 202 1 , the Company was in compliance with these covenants. On April 25, 2019, the Company borrowed $8.0 million U.S. dollars on behalf of its Indonesian subsidiary at a rate of 3.501% with a term expiring on April 30, 2024. At June 30, 2021, $6.3 million was outstanding on this debt facility, of which $.8 million is classified as current. On August 14, 2019, the Company’s New Zealand subsidiary borrowed $5.3 million U.S. dollars at a rate of 3.900% with a term expiring on August 26, 2021. At June 30, 2021, $3.8 million was outstanding on this facility, all of which is classified as current and has an interest rate of 3.150%. This loan is secured by the Company’s New Zealand subsidiary’s land and building. For the periods ended June 30, 2021 and December 31, 2020, the Company’s Asia-Pacific segment had $.3 million and $.6 million, respectively, in restricted cash used to secure bank debt. The restricted cash is shown on the Company’s Consolidated Balance Sheets in Cash and cash equivalents.

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	NOTE Q – LEASES The Company regularly enters into leases in the normal course of business. As of June 30, 2021, the leases in effect were related to land, buildings, vehicles, office equipment and other production equipment under operating leases with lease terms of up to 99 years. The Company often has the option to renew lease terms for buildings and other assets. The exercise of lease renewal options are generally at the Company’s sole discretion. In addition, certain lease arrangements may be terminated prior to their original expiration date at the Company’s discretion. The Company evaluates renewal and termination options at the lease commencement date to determine if the Company is reasonably certain to exercise the option on the basis of economic factors. The weighted average remaining lease term for the Company’s operating and financing leases as of June 30, 2021 was 17.9 and 3.0 years, respectively. Lease expense is recognized for these leases on a straight-line basis over the lease term with variable lease payments recognized in the period those payments are incurred. The components of operating and finance lease costs are recognized in Costs and expenses and Interest expense, respectively, on the Company’s Consolidated Statements of Income. The Company’s operating and finance lease costs for the six months ended June 30, 2021 and 2020 were as follows: Six Months Ended June 30, 2021 June 30, 2020 Components of lease expense Operating lease cost $ 1,483 $ 1,442 Finance lease cost Amortization of right-of-use assets 205 32 Interest on lease liabilities 16 5 Total lease cost $ 1,704 $ 1,479 The discount rate implicit within each lease is often not determinable and, therefore, the Company establishes the discount rate based on its incremental borrowing rate. The incremental borrowing rate for the Company’s leases is determined based on lease term and currency in which lease payments are made, adjusted for impacts of collateral. The weighted average discount rate used to measure the Company’s operating and finance lease liabilities as of June 30, 2021 was 4.92% and 4.14%, respectively. Future maturities of the Company’s lease liabilities as of June 30, 2021 are as follows: Operating Leases Finance Leases 2021 $ 1,241 $ 202 2022 2,342 231 2023 1,688 130 2024 988 81 2025 and thereafter 11,098 88 Total lease payments 17,357 732 Less amount of lease payment representing interest 6,047 45 Total present value of lease payments $ 11,310 $ 687 The total minimum sublease rentals under noncancelable subleases to be received through 2023 is $2.1 million. Supplemental cash flow information related to leases for the six-month period ended June 30, 2021 was as follows: June 30, 2021 June 30, 2020 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,440 $ 1,341 Operating cash flows from finance leases 16 5 Financing cash flows from finance leases 209 57

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	NOTE R – RELATED PARTY TRANSACTIONS On January 4, 2021, the Company purchased 1,160 shares of the Company from a retired Officer at a price per share of $66.01, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On February 3, 2021, the Company purchased 29,676 shares of the Company from current and retired Officers at a price per share of $69.19, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On March 10, 2021, the Company purchased 19,497 shares of the Company from current Officers at a price per share of $71.10, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On March 15, 2021, the Company purchased 2,257 shares of the Company from a current employee at a price per share of $71.91, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On June 9, 2021, the Company purchased 1,500 shares of the Company from a current employee at a price per share of $74.09, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On June 15, 2021, the Company purchased 10,000 shares of the Company from a current Officer at a price per share of $75.87, which was calculated from a 30-day average market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction.

Revenue (Policies)

Revenue (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Revenue Recognition	Revenue recognition Net sales include products and shipping and handling charges, net of estimates for product returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products. All revenue is recognized when the Company satisfies the performance obligations under the contract and control of the product is transferred to the customer, primarily based on shipping terms. Revenue for shipping and handling charges are recognized at the time the products are shipped to, delivered to or picked up by the customer. The Company estimates product returns based on historical return rates.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue From Contract With Customer [Abstract]
Revenues by Segment and Product Type	The Company’s revenues by segment and product type are as follows: Three Months Ended June 30, 2021 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 61 % 65 % 51 % 65 % 60 % Communications 35 31 44 3 30 Special Industries 4 4 5 32 10 Total 100 % 100 % 100 % 100 % 100 % Three Months Ended June 30, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 65 % 78 % 60 % 74 % 68 % Communications 30 18 33 4 23 Special Industries 5 4 7 22 9 Total 100 % 100 % 100 % 100 % 100 % Six Months Ended June 30, 2021 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 59 % 70 % 55 % 67 % 61 % Communications 36 26 39 5 30 Special Industries 5 4 6 28 9 Total 100 % 100 % 100 % 100 % 100 % Six Months Ended June 30, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 64 % 76 % 57 % 74 % 67 % Communications 30 18 35 4 24 Special Industries 6 6 8 22 9 Total 100 % 100 % 100 % 100 % 100 %

Other Financial Statement Inf_2

Other Financial Statement Information (Tables)	6 Months Ended
	Jun. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Inventories - Net	Inventories – net June 30, 2021 December 31, 2020 Raw materials $ 60,987 $ 53,947 Work-in-process 10,654 9,272 Finished Goods 40,065 38,801 111,706 102,020 Excess of current cost over LIFO cost (6,278 ) (4,483 ) Net Inventory $ 105,428 $ 97,537
Property, Plant and Equipment - Net	Major classes of Property, plant and equipment are stated at cost and were as follows: June 30, 2021 December 31, 2020 Land and improvements $ 21,875 $ 22,132 Buildings and improvements 100,377 97,909 Machinery, equipment and aircraft 199,447 176,377 Construction in progress 12,577 9,563 334,276 305,981 Less accumulated depreciation (185,765 ) (180,016 ) $ 148,511 $ 125,965

Shareholders Equity (Tables)

Shareholders Equity (Tables)	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Summary of Changes in Shareholders Equity	The following table reflects the changes in shareholders equity for the six months ended June 30, 2021 and 2020: Accumulated Other Comprehensive Income (Loss) Common Shares Common Shares Issued to Rabbi Trust Deferred Compensation Liability Paid in Capital Retained Earnings Treasury Shares Cumulative Translation Adjustment Unrecognized Pension Benefit Cost Total Preformed Line Products Company Equity Noncontrolling Interests Total Equity (In thousands, except share and per share data) Balance at December 31, 2020 $ 13,028 $ (10,940 ) $ 10,940 $ 43,134 $ 379,035 $ (88,568 ) $ (47,847 ) $ (6,704 ) $ 292,078 $ (9 ) $ 292,069 Net income (loss) 7,179 7,179 (2 ) 7,177 Foreign currency translation adjustment (4,829 ) (4,829 ) (4,829 ) Recognized net actuarial gain, net of tax provision of $35 114 114 114 Total comprehensive income 2,464 (2 ) 2,462 Share-based compensation 1,034 (40 ) 994 994 Purchase of 52,590 common shares (3,678 ) (3,678 ) (3,678 ) Issuance of 63,316 common shares 127 270 397 397 Common shares distributed from rabbi trust of 3,727, net 120 (120 ) 0 0 Cash dividends declared - $.20 per share (116 ) (990 ) (1,106 ) (1,106 ) Balance at March 31, 2021 $ 13,155 $ (10,820 ) $ 10,820 $ 44,322 $ 385,184 $ (92,246 ) $ (52,676 ) $ (6,590 ) $ 291,149 $ (11 ) $ 291,138 Net income (loss) 8,869 8,869 22 8,891 Foreign currency translation adjustment 4,311 4,311 4,311 Recognized net actuarial gain, net of tax provision of $35 113 113 113 Total comprehensive income 13,293 22 13,315 Share-based compensation 893 (40 ) 853 853 Purchase of 13,800 common shares (1,046 ) (1,046 ) (1,046 ) Issuance of 7,400 common shares 15 349 364 364 Common shares issued to rabbi trust of 400, net (30 ) 30 0 0 Cash dividends declared - $.20 per share (981 ) (981 ) (981 ) Balance at June 30, 2021 $ 13,170 $ (10,850 ) $ 10,850 $ 45,564 $ 393,032 $ (93,292 ) $ (48,365 ) $ (6,477 ) $ 303,632 $ 11 $ 303,643 Accumulated Other Comprehensive Income (Loss) Common Shares Common Shares Issued to Rabbi Trust Deferred Compensation Liability Paid in Capital Retained Earnings Treasury Shares Cumulative Translation Adjustment Unrecognized Pension Benefit Cost Total Preformed Line Products Company Equity Noncontrolling Interests Total Equity (In thousands, except share and per share data) Balance at December 31, 2019 $ 12,848 $ (10,981 ) $ 10,981 $ 38,854 $ 353,292 $ (79,106 ) $ (51,682 ) $ (5,671 ) $ 268,535 $ 33 $ 268,568 Net income (loss) 3,698 3,698 (45 ) 3,653 Foreign currency translation adjustment (16,881 ) (16,881 ) (16,881 ) Recognized net actuarial gain, net of tax provision of $31 98 98 98 Total comprehensive income (13,085 ) (45 ) (13,130 ) Share-based compensation 976 (43 ) 933 933 Purchase of 75,246 common shares (3,980 ) (3,980 ) (3,980 ) Issuance of 77,381 common shares 155 155 155 Common shares distributed from rabbi trust of 3,358, net 101 (101 ) 0 0 Cash dividends declared - $.20 per share (83 ) (963 ) (1,046 ) (1,046 ) Balance at March 31, 2020 $ 13,003 $ (10,880 ) $ 10,880 $ 39,747 $ 355,984 $ (83,086 ) $ (68,563 ) $ (5,573 ) $ 251,512 $ (12 ) $ 251,500 Net income 10,481 10,481 7 10,488 Foreign currency translation adjustment 5,472 5,472 5,472 Recognized net actuarial gain, net of tax provision of $31 91 91 91 Total comprehensive income 16,044 7 16,051 Share-based compensation 612 (26 ) 586 586 Purchase of 29,724 common shares (3,011 ) (3,011 ) (3,011 ) Issuance of 525 common shares 26 26 26 Common shares distributed from rabbi trust of 525, net (30 ) 30 0 0 Cash dividends declared - $.20 per share (996 ) (996 ) (996 ) Balance at June 30, 2020 $ 13,003 $ (10,910 ) $ 10,910 $ 40,385 $ 365,443 $ (86,097 ) $ (63,091 ) $ (5,482 ) $ 264,161 $ (5 ) $ 264,156

Pension Plans (Tables)

Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Pension Cost	Net periodic pension cost for this plan included the following components: Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Service cost $ 0 $ 90 $ 0 $ 181 Interest cost 282 326 564 653 Expected return on plan assets (586 ) (556 ) (1,172 ) (1,113 ) Recognized net actuarial loss 149 130 298 259 Net periodic pension cost (benefit) $ (155 ) $ (10 ) $ (310 ) $ (20 )

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income ("AOCI") (Tables)	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Summary of Total Changes in AOCI by Component, Net of Tax	The following tables set forth the total changes in AOCI by component, net of tax: Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Unrecognized pension benefit cost Currency Translation Adjustment Total Unrecognized pension benefit cost Currency Translation Adjustment Total Balance at April 1 $ (6,590 ) $ (52,676 ) $ (59,266 ) $ (5,573 ) $ (68,563 ) $ (74,136 ) Other comprehensive income before reclassifications: Gain on foreign currency translation adjustment 0 4,311 4,311 0 5,472 5,472 Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial gain (a) 113 0 113 91 0 91 Net current period other comprehensive income 113 4,311 4,424 91 5,472 5,563 Balance at June 30 $ (6,477 ) $ (48,365 ) $ (54,842 ) $ (5,482 ) $ (63,091 ) $ (68,573 ) Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 Defined pension plan activity Currency Translation Adjustment Total Defined benefit pension plan activity Currency Translation Adjustment Total Balance at January 1 $ (6,704 ) $ (47,847 ) $ (54,551 ) $ (5,671 ) $ (51,682 ) $ (57,353 ) Other comprehensive loss before reclassifications: Loss on foreign currency translation adjustment 0 (518 ) (518 ) 0 (11,409 ) (11,409 ) Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial gain (a) 227 0 227 189 0 189 Net current period other comprehensive income (loss) 227 (518 ) (291 ) 189 (11,409 ) (11,220 ) Balance at June 30 $ (6,477 ) $ (48,365 ) $ (54,842 ) $ (5,482 ) $ (63,091 ) $ (68,573 ) (a) This AOCI component is included in the computation of net periodic pension costs.

Computation of Earnings Per S_2

Computation of Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	The calculation of basic and diluted earnings per share for the three and six-month periods ended June 30, 2021 and 2020 was as follows: Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Numerator Net income $ 8,869 $ 10,481 $ 16,048 $ 14,179 Denominator Determination of shares Weighted-average common shares outstanding 4,912 4,966 4,914 4,987 Dilutive effect - share-based awards 18 7 21 7 Diluted weighted-average common shares outstanding 4,930 4,973 4,935 4,994 Earnings per common share Basic $ 1.81 $ 2.11 $ 3.27 $ 2.84 Diluted $ 1.80 $ 2.11 $ 3.25 $ 2.84

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	6 Months Ended
	Jun. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Finite and Indefinite-Lived Intangible Assets	The Company’s finite and indefinite-lived intangible assets consist of the following: June 30, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Finite-lived intangible assets Patents $ 4,813 $ (4,806 ) $ 4,806 $ (4,806 ) Land use rights 1,346 (442 ) 1,286 (396 ) Trademarks 1,872 (1,509 ) 1,756 (1,474 ) Technology 7,593 (2,657 ) 7,673 (2,402 ) Customer relationships 16,399 (8,954 ) 16,441 (8,441 ) $ 32,023 $ (18,368 ) $ 31,962 $ (17,519 ) Indefinite-lived intangible assets Goodwill $ 29,316 $ 29,508
Changes in Carrying Amount of Goodwill by Segment	The changes in the carrying amount of goodwill, by segment, for the six months ended June 30, 2021 are as follows: USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2021 $ 3,078 $ 4,251 $ 14,449 $ 7,730 $ 29,508 Currency translation 0 159 (227 ) (124 ) (192 ) Balance at June 30, 2021 $ 3,078 $ 4,410 $ 14,222 $ 7,606 $ 29,316

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Summary of RSUs Outstanding Under LTIP	A summary of the RSUs outstanding under the LTIP for the six months ended June 30, 2021 is as follows: Restricted Share Units Performance and Service Required (1) Service Required Total Restricted Share Units Weighted-Average Grant-Date Fair Value Nonvested as of January 1, 2021 183,777 15,786 199,563 $ 60.33 Granted 51,308 12,285 63,593 71.84 Vested (56,973 ) 0 (56,973 ) 73.86 Forfeited 0 0 0 0.00 Nonvested as of June 30, 2021 178,112 28,071 206,183 $ 60.49 (1) Nonvested, performance-based RSUs are reflected above at the maximum performance achievement level with the exception of the 2021 grant, which is currently recorded at its target rate.
Long Term Incentive Plan [Member]
Stock Option Activity in Company's Plan	Stock option activity under the Company’s LTIP for six months ended June 30, 2021 was as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (000's) Outstanding at January 1, 2021 50,950 $ 54.81 Granted 0 Exercised (7,000 ) $ 47.66 Forfeited 0 Outstanding (vested and expected to vest) at June 30, 2021 43,950 $ 55.95 6.7 $ 802 Exercisable at June 30, 2021 27,450 $ 58.91 5.5 $ 420

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Recorded and Measured at Fair Value	The following table summarizes the Company’s assets and liabilities, recorded and measured at fair value, on the Company’s Consolidated Balance Sheets as of June 30, 2021 and December 31, 2020: Description Balance as of June 30, 2021 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Foreign currency forward contracts $ 295 $ 0 $ 295 $ 0 Total Assets $ 295 $ 0 $ 295 $ 0 Liabilities: Supplemental profit sharing plan $ 7,330 $ 0 $ 7,330 $ 0 Foreign currency forward contracts 155 0 155 0 Total Liabilities $ 7,485 $ 0 $ 7,485 $ 0 Description Balance as of December 31, 2020 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Foreign currency forward contracts $ 359 $ 0 $ 359 $ 0 Total Assets $ 359 $ 0 $ 359 $ 0 Liabilities: Supplemental profit sharing plan $ 7,143 $ 0 $ 7,143 $ 0 Foreign currency forward contracts 56 0 56 0 Total Liabilities $ 7,199 $ 0 $ 7,199 $ 0

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Summary of Company's Reportable Segments	The following tables present a summary of the Company’s reportable segments for the three and six months ended June 30, 2021 and 2020. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profit in inventory. Three Months Ended June 30 Six Months Ended June 30 2021 2020 2021 2020 Net sales PLP-USA $ 62,087 $ 53,966 $ 118,316 $ 100,567 The Americas 18,625 17,486 36,146 34,727 EMEA 27,352 21,048 50,834 41,408 Asia-Pacific 24,974 25,129 45,295 43,779 Total net sales $ 133,038 $ 117,629 $ 250,591 $ 220,481 Intersegment sales PLP-USA $ 3,779 $ 2,129 $ 6,164 $ 5,001 The Americas 2,556 2,813 4,622 4,677 EMEA 1,421 1,156 1,932 1,622 Asia-Pacific 4,812 3,910 8,465 6,004 Total intersegment sales $ 12,568 $ 10,008 $ 21,183 $ 17,304 Income taxes PLP-USA $ 2,481 $ 2,025 $ 4,859 $ 2,871 The Americas 659 812 1,268 1,445 EMEA 409 445 854 531 Asia-Pacific 137 115 82 1 Total income taxes $ 3,686 $ 3,397 $ 7,063 $ 4,848 Net income attributable to Preformed Line Products Company shareholders PLP-USA $ 6,319 $ 6,135 $ 11,895 $ 9,686 The Americas 1,962 1,695 3,153 2,690 EMEA 1,043 2,247 2,239 2,583 Asia-Pacific (455 ) 404 (1,239 ) (780 ) Total net income attributable to Preformed Line Products Company shareholders $ 8,869 $ 10,481 $ 16,048 $ 14,179 June 30, 2021 December 31, 2020 Assets PLP-USA $ 163,557 $ 137,689 The Americas 77,422 75,438 EMEA 106,629 106,922 Asia-Pacific 135,801 141,038 Total identifiable assets $ 483,409 $ 461,087

Product Warranty Reserve (Table

Product Warranty Reserve (Tables)	6 Months Ended
	Jun. 30, 2021
Guarantees [Abstract]
Roll Forward of Product Warranty Reserve	The following is a rollforward of the product warranty reserve: Six Months Ended June 30 2021 2020 Beginning of period balance $ 1,282 $ 1,309 Additions charged to income 1,325 48 Warranty usage (244 ) (28 ) Currency translation 0 (87 ) End of period balance $ 2,363 $ 1,242

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Summary of Components of Lease Expense	The Company’s operating and finance lease costs for the six months ended June 30, 2021 and 2020 were as follows: Six Months Ended June 30, 2021 June 30, 2020 Components of lease expense Operating lease cost $ 1,483 $ 1,442 Finance lease cost Amortization of right-of-use assets 205 32 Interest on lease liabilities 16 5 Total lease cost $ 1,704 $ 1,479
Schedule of Future Maturities of Lease Liabilities	Future maturities of the Company’s lease liabilities as of June 30, 2021 are as follows: Operating Leases Finance Leases 2021 $ 1,241 $ 202 2022 2,342 231 2023 1,688 130 2024 988 81 2025 and thereafter 11,098 88 Total lease payments 17,357 732 Less amount of lease payment representing interest 6,047 45 Total present value of lease payments $ 11,310 $ 687
Summary of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases for the six-month period ended June 30, 2021 was as follows: June 30, 2021 June 30, 2020 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,440 $ 1,341 Operating cash flows from finance leases 16 5 Financing cash flows from finance leases 209 57

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Percentage of ownership in earnings of subsidiary	100.00%

Revenue - Revenues by Segment a

Revenue - Revenues by Segment and Product Type (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	60.00%	68.00%	61.00%	67.00%
Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	30.00%	23.00%	30.00%	24.00%
Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	10.00%	9.00%	9.00%	9.00%
PLP-USA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
PLP-USA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	61.00%	65.00%	59.00%	64.00%
PLP-USA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	35.00%	30.00%	36.00%	30.00%
PLP-USA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	4.00%	5.00%	5.00%	6.00%
The Americas [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
The Americas [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	65.00%	78.00%	70.00%	76.00%
The Americas [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	31.00%	18.00%	26.00%	18.00%
The Americas [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	4.00%	4.00%	4.00%	6.00%
EMEA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
EMEA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	51.00%	60.00%	55.00%	57.00%
EMEA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	44.00%	33.00%	39.00%	35.00%
EMEA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	5.00%	7.00%	6.00%	8.00%
Asia-Pacific [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
Asia-Pacific [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	65.00%	74.00%	67.00%	74.00%
Asia-Pacific [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	3.00%	4.00%	5.00%	4.00%
Asia-Pacific [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	32.00%	22.00%	28.00%	22.00%

Other Financial Statement Inf_3

Other Financial Statement Information - Inventories - Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 60,987	$ 53,947
Work-in-process	10,654	9,272
Finished Goods	40,065	38,801
Inventory, gross	111,706	102,020
Excess of current cost over LIFO cost	(6,278)	(4,483)
Net Inventory	$ 105,428	$ 97,537

Other Financial Statement Inf_4

Other Financial Statement Information - Additional Information (Detail) - USD ($) $ in Millions	Nov. 02, 2016	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Inventory [Line Items]
Cost of inventories for certain materials using LIFO method		$ 32.4		$ 32.4		$ 32
Expense (benefit) charge to earnings from LIFO inventory changes		$ 1.3		1.8	$ 0.2
Accrued estimate for losses				$ 2.2		$ 2.2
Name of plaintiff				Altalink, L.P.
Complaint filling date				November 2016
Estimated damages from defendants	$ 56
Maximum [Member]
Inventory [Line Items]
Expense (benefit) charge to earnings from LIFO inventory changes			$ 0.1

Other Financial Statement Inf_5

Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	$ 334,276	$ 305,981
Less accumulated depreciation	(185,765)	(180,016)
Property, plant and equipment - Net	148,511	125,965
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	21,875	22,132
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	100,377	97,909
Machinery, Equipment and Aircraft [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	199,447	176,377
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	$ 12,577	$ 9,563

Shareholders Equity - Summary o

Shareholders Equity - Summary of Changes in Shareholders Equity (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders Equity Note [Line Items]
Beginning Balance	$ 291,138	$ 292,069	$ 251,500	$ 268,568	$ 292,069	$ 268,568
Net income (loss)	8,891	7,177	10,488	3,653	16,068	14,141
Foreign currency translation adjustment	4,311	(4,829)	5,472	(16,881)	(518)	(11,409)
Recognized net actuarial gain, net of tax provision	113	114	91	98	227	189
Total comprehensive income	13,315	2,462	16,051	(13,130)
Share-based compensation	853	994	586	933
Purchase of common shares	(1,046)	(3,678)	(3,011)	(3,980)
Issuance of common shares	364	397	26	155
Common shares distributed from rabbi trust	0	0	0	0
Cash dividends declared per share	(981)	(1,106)	(996)	(1,046)
Ending Balance	303,643	291,138	264,156	251,500	303,643	264,156
Common Shares [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	13,155	13,028	13,003	12,848	13,028	12,848
Issuance of common shares	15	127		155
Ending Balance	13,170	13,155	13,003	13,003	13,170	13,003
Common Shares Issued to Rabbi Trust [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	(10,820)	(10,940)	(10,880)	(10,981)	(10,940)	(10,981)
Common shares distributed from rabbi trust	(30)	120	(30)	101
Ending Balance	(10,850)	(10,820)	(10,910)	(10,880)	(10,850)	(10,910)
Deferred Compensation Liability [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	10,820	10,940	10,880	10,981	10,940	10,981
Common shares distributed from rabbi trust	30	(120)	30	(101)
Ending Balance	10,850	10,820	10,910	10,880	10,850	10,910
Paid In Capital [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	44,322	43,134	39,747	38,854	43,134	38,854
Share-based compensation	893	1,034	612	976
Issuance of common shares	349	270	26
Cash dividends declared per share		(116)		(83)
Ending Balance	45,564	44,322	40,385	39,747	45,564	40,385
Retained Earnings [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	385,184	379,035	355,984	353,292	379,035	353,292
Net income (loss)	8,869	7,179	10,481	3,698
Share-based compensation	(40)	(40)	(26)	(43)
Cash dividends declared per share	(981)	(990)	(996)	(963)
Ending Balance	393,032	385,184	365,443	355,984	393,032	365,443
Treasury Stock [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	(92,246)	(88,568)	(83,086)	(79,106)	(88,568)	(79,106)
Purchase of common shares	(1,046)	(3,678)	(3,011)	(3,980)
Ending Balance	(93,292)	(92,246)	(86,097)	(83,086)	(93,292)	(86,097)
Cumulative Translation Adjustment [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	(52,676)	(47,847)	(68,563)	(51,682)	(47,847)	(51,682)
Foreign currency translation adjustment	4,311	(4,829)	5,472	(16,881)
Ending Balance	(48,365)	(52,676)	(63,091)	(68,563)	(48,365)	(63,091)
Unrecognized Pension Benefit Cost [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	(6,590)	(6,704)	(5,573)	(5,671)	(6,704)	(5,671)
Recognized net actuarial gain, net of tax provision	113	114	91	98
Ending Balance	(6,477)	(6,590)	(5,482)	(5,573)	(6,477)	(5,482)
Total Preformed Line Products, Company Equity [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	291,149	292,078	251,512	268,535	292,078	268,535
Net income (loss)	8,869	7,179	10,481	3,698
Foreign currency translation adjustment	4,311	(4,829)	5,472	(16,881)
Recognized net actuarial gain, net of tax provision	113	114	91	98
Total comprehensive income	13,293	2,464	16,044	(13,085)
Share-based compensation	853	994	586	933
Purchase of common shares	(1,046)	(3,678)	(3,011)	(3,980)
Issuance of common shares	364	397	26	155
Common shares distributed from rabbi trust	0	0	0	0
Cash dividends declared per share	(981)	(1,106)	(996)	(1,046)
Ending Balance	303,632	291,149	264,161	251,512	303,632	264,161
Noncontrolling Interests [Member]
Stockholders Equity Note [Line Items]
Beginning Balance	(11)	(9)	(12)	33	(9)	33
Net income (loss)	22	(2)	7	(45)
Total comprehensive income	22	(2)	7	(45)
Ending Balance	$ 11	$ (11)	$ (5)	$ (12)	$ 11	$ (5)

Shareholders Equity - Summary_2

Shareholders Equity - Summary of Changes in Shareholders Equity (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders Equity Note [Line Items]
Tax provision (benefit) for recognized net actuarial loss (gain)	$ (35)		$ (39)		$ (70)	$ (70)
Unrecognized Pension Benefit Cost [Member]
Stockholders Equity Note [Line Items]
Tax provision (benefit) for recognized net actuarial loss (gain)	$ 35	$ 35	$ 31	$ 31
Treasury Stock [Member]
Stockholders Equity Note [Line Items]
Purchase of common shares	13,800	52,590	29,724	75,246
Common Shares [Member]
Stockholders Equity Note [Line Items]
Issuance of common shares	7,400	63,316	525	77,381
Common Shares Issued to Rabbi Trust [Member]
Stockholders Equity Note [Line Items]
Common shares distributed from rabbi trust	400	3,727	525	3,358
Deferred Compensation Liability [Member]
Stockholders Equity Note [Line Items]
Common shares distributed from rabbi trust	400	3,727	525	3,358
Retained Earnings [Member]
Stockholders Equity Note [Line Items]
Cash dividends declared per share	$ 0.20	$ 0.20	$ 0.20	$ 0.20

Pension Plans - Components of N

Pension Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 0	$ 90	$ 0	$ 181
Interest cost	282	326	564	653
Expected return on plan assets	(586)	(556)	(1,172)	(1,113)
Recognized net actuarial loss	149	130	298	259
Net periodic pension cost (benefit)	$ (155)	$ (10)	$ (310)	$ (20)

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021USD ($)
Compensation And Retirement Disclosure [Abstract]
Contribution to pension plan	$ 0
Pension plan contributions to be made during the remainder of 2021	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income ("AOCI") - Summary of Total Changes in AOCI by Component, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 292,078
Other comprehensive income (loss) before reclassifications:
Gain (loss) on foreign currency translation adjustment	$ 4,311	$ 5,472	(518)	$ (11,409)
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial gain	113	91	227	189
Net current period other comprehensive income (loss)	4,424	5,563	(291)	(11,220)
Ending Balance	303,632		303,632
Unrecognized Pension Benefit Cost [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6,590)	(5,573)	(6,704)	(5,671)
Other comprehensive income (loss) before reclassifications:
Gain (loss) on foreign currency translation adjustment	0	0	0	0
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial gain	113	91	227	189
Net current period other comprehensive income (loss)	113	91	227	189
Ending Balance	(6,477)	(5,482)	(6,477)	(5,482)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(52,676)	(68,563)	(47,847)	(51,682)
Other comprehensive income (loss) before reclassifications:
Gain (loss) on foreign currency translation adjustment	4,311	5,472	(518)	(11,409)
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial gain	0	0	0	0
Net current period other comprehensive income (loss)	4,311	5,472	(518)	(11,409)
Ending Balance	(48,365)	(63,091)	(48,365)	(63,091)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(59,266)	(74,136)	(54,551)	(57,353)
Amounts reclassified from AOCI:
Ending Balance	$ (54,842)	$ (68,573)	$ (54,842)	$ (68,573)

Computation of Earnings Per S_3

Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator
Net income	$ 8,869	$ 10,481	$ 16,048	$ 14,179
Determination of shares
Weighted-average common shares outstanding	4,912	4,966	4,914	4,987
Dilutive effect - share-based awards	18	7	21	7
Diluted weighted-average common shares outstanding	4,930	4,973	4,935	4,994
Earnings per common share
Basic	$ 1.81	$ 2.11	$ 3.27	$ 2.84
Diluted	$ 1.80	$ 2.11	$ 3.25	$ 2.84

Computation of Earnings Per S_4

Computation of Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from calculation of earnings per share	0	40,313	10,000	30,157

Goodwill and Other Intangible_2

Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-lived intangible assets
Gross Carrying Amount	$ 32,023	$ 31,962
Accumulated Amortization	(18,368)	(17,519)
Indefinite-lived intangible assets Goodwill	29,316	29,508
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,813	4,806
Accumulated Amortization	(4,806)	(4,806)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,346	1,286
Accumulated Amortization	(442)	(396)
Trademarks [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,872	1,756
Accumulated Amortization	(1,509)	(1,474)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	7,593	7,673
Accumulated Amortization	(2,657)	(2,402)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	16,399	16,441
Accumulated Amortization	$ (8,954)	$ (8,441)

Goodwill and Other Intangible_3

Goodwill and Other Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 500	$ 400	$ 900	$ 900
2021	800		800
2022	1,700		1,700
2023	1,700		1,700
2024	1,600		1,600
2025	1,400		$ 1,400
Remaining amortization period			12 years 1 month 6 days
Goodwill	$ 29,316		$ 29,316		$ 29,508
Asia-Pacific [Member]
Finite Lived Intangible Assets [Line Items]
Percentage of fair value of reporting unit exceeded carrying value	15.00%		15.00%
Goodwill	$ 7,606		$ 7,606		$ 7,730
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			0 years
Land Use Rights [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			55 years
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			6 years 4 months 24 days
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			9 years 7 months 6 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			9 years 1 month 6 days

Goodwill and Other Intangible_4

Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Goodwill [Line Items]
Beginning Balance	$ 29,508
Currency translation	(192)
Ending Balance	29,316
USA [Member]
Goodwill [Line Items]
Beginning Balance	3,078
Currency translation	0
Ending Balance	3,078
The Americas [Member]
Goodwill [Line Items]
Beginning Balance	4,251
Currency translation	159
Ending Balance	4,410
EMEA [Member]
Goodwill [Line Items]
Beginning Balance	14,449
Currency translation	(227)
Ending Balance	14,222
Asia-Pacific [Member]
Goodwill [Line Items]
Beginning Balance	7,730
Currency translation	(124)
Ending Balance	$ 7,606

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)shares	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)Deferralshares	Jun. 30, 2020USD ($)shares	Dec. 31, 2020shares	May 10, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred shares and held by the rabbi trust	262,181		262,181		265,508
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards	800,000		800,000
Long Term Incentive Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards	100,000		100,000
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses | $	$ 100,000	$ 100,000	$ 300,000	$ 200,000
Compensation cost expected to be recognized over period | $	1,100,000		$ 1,100,000
Weighted-average period			2 years 1 month 6 days
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period			1 year 9 months 18 days
Performance-based compensation expense (income) | $	800,000	500,000	$ 1,500,000	$ 1,300,000
Remaining compensation expense | $	$ 4,000,000		$ 4,000,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards	900,000		900,000
2016 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards						1,000,000
Incentive plan expiry date			May 10, 2026
2016 Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards						900,000
2016 Incentive Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards						100,000
Long Term Incentive Plan and 2016 Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option issued under plan vest and expire			5 years
Long Term Incentive Plan and 2016 Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option issued under plan vest and expire			10 years
Long Term Incentive Plan and 2016 Incentive Plan [Member] | After One Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards vesting percentage			50.00%
Long Term Incentive Plan and 2016 Incentive Plan [Member] | After Two Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards vesting percentage			75.00%
Long Term Incentive Plan and 2016 Incentive Plan [Member] | After Three Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards vesting percentage			100.00%
Long Term Incentive Plan Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Shares			0	25,500
Exercised, Number of Shares			7,000	0
Long Term Incentive Plan Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses | $	$ 100,000	$ 100,000	$ 100,000	$ 100,000
Weighted-average period			1 year 8 months 12 days
Expected compensation cost related to unvested awards not yet recognized | $	$ 200,000		$ 200,000
Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of deferrals | Deferral			2

Share-Based Compensation - Summ

Share-Based Compensation - Summary of RSUs Outstanding Under LTIP (Detail)	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2021	199,563
Granted	63,593
Vested	(56,973)
Forfeited	0
Nonvested as of June 30, 2021	206,183
Nonvested as of January 1, 2021, Weighted-Average Grant-Date Fair Value | $ / shares	$ 60.33
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	71.84
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	73.86
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	0
Nonvested as of June 30, 2021, Weighted-Average Grant-Date Fair Value | $ / shares	$ 60.49
Performance and Service Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2021	183,777
Granted	51,308
Vested	(56,973)
Forfeited	0
Nonvested as of June 30, 2021	178,112
Service Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2021	15,786
Granted	12,285
Vested	0
Forfeited	0
Nonvested as of June 30, 2021	28,071

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity under Company's Plan - Long Term Incentive Plan (Detail) - Long Term Incentive Plan Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2021, Number of Shares	50,950
Granted, Number of Shares	0	25,500
Exercised, Number of Shares	(7,000)	0
Forfeited, Number of Shares	0
Outstanding (vested and expected to vest) at June 30, 2021, Number of Shares	43,950
Exercisable at June 30, 2021, Number of Shares	27,450
Outstanding at January 1, 2021, Weighted Average Exercise Price per Share	$ 54.81
Exercised, Weighted Average Exercise Price per Share	47.66
Outstanding (vested and expected to vest) at June 30, 2021, Weighted Average Exercise Price per Share	55.95
Exercisable at June 30, 2021, Weighted Average Exercise Price per Share	$ 58.91
Outstanding (vested and expected to vest) at June 30, 2021, Weighted Average Remaining Contractual Term	6 years 8 months 12 days
Exercisable at June 30, 2021, Weighted Average Remaining Contractual Term	5 years 6 months
Outstanding (vested and expected to vest) at June 30, 2021, Aggregate Intrinsic Value	$ 802
Exercisable at June 30, 2021, Aggregate Intrinsic Value	$ 420

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities - Summary of Assets and Liabilities Recorded and Measured at Fair Value (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	$ 295	$ 359
Total Assets	295	359
Supplemental profit sharing plan	7,330	7,143
Foreign currency forward contracts	155	56
Total Liabilities	7,485	7,199
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	0	0
Total Assets	0	0
Supplemental profit sharing plan	0	0
Foreign currency forward contracts	0	0
Total Liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	295	359
Total Assets	295	359
Supplemental profit sharing plan	7,330	7,143
Foreign currency forward contracts	155	56
Total Liabilities	7,485	7,199
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	0	0
Total Assets	0	0
Supplemental profit sharing plan	0	0
Foreign currency forward contracts	0	0
Total Liabilities	$ 0	$ 0

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts Maturity Period			90 days
Foreign currency transaction gains and (losses)	$ (1,300)	$ (300)	$ (900)	$ 900
Supplemental profit sharing plan	7,330		7,330		$ 7,143
Profit Sharing Plan [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Supplemental profit sharing plan	$ 7,300		$ 7,300		$ 7,100

Recently Adopted Accounting P_2

Recently Adopted Accounting Pronouncements - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021
Accounting Changes And Error Corrections [Abstract]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201912Member
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true

Segment Information - Summary o

Segment Information - Summary of Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Net sales
Net sales	$ 133,038	$ 117,629	$ 250,591	$ 220,481
Income taxes
Income taxes	3,686	3,397	7,063	4,848
Net income attributable to Preformed Line Products Company shareholders
Net income attributable to Preformed Line Products Company shareholders	8,869	10,481	16,048	14,179
Assets
Identifiable assets	483,409		483,409		$ 461,087
PLP-USA [Member]
Net sales
Net sales	62,087	53,966	118,316	100,567
Income taxes
Income taxes	2,481	2,025	4,859	2,871
Net income attributable to Preformed Line Products Company shareholders
Net income attributable to Preformed Line Products Company shareholders	6,319	6,135	11,895	9,686
Assets
Identifiable assets	163,557		163,557		137,689
The Americas [Member]
Net sales
Net sales	18,625	17,486	36,146	34,727
Income taxes
Income taxes	659	812	1,268	1,445
Net income attributable to Preformed Line Products Company shareholders
Net income attributable to Preformed Line Products Company shareholders	1,962	1,695	3,153	2,690
Assets
Identifiable assets	77,422		77,422		75,438
EMEA [Member]
Net sales
Net sales	27,352	21,048	50,834	41,408
Income taxes
Income taxes	409	445	854	531
Net income attributable to Preformed Line Products Company shareholders
Net income attributable to Preformed Line Products Company shareholders	1,043	2,247	2,239	2,583
Assets
Identifiable assets	106,629		106,629		106,922
Asia-Pacific [Member]
Net sales
Net sales	24,974	25,129	45,295	43,779
Income taxes
Income taxes	137	115	82	1
Net income attributable to Preformed Line Products Company shareholders
Net income attributable to Preformed Line Products Company shareholders	(455)	404	(1,239)	(780)
Assets
Identifiable assets	135,801		135,801		$ 141,038
Intersegment Eliminations [Member]
Net sales
Net sales	(12,568)	(10,008)	(21,183)	(17,304)
Intersegment Eliminations [Member] | PLP-USA [Member]
Net sales
Net sales	(3,779)	(2,129)	(6,164)	(5,001)
Intersegment Eliminations [Member] | The Americas [Member]
Net sales
Net sales	(2,556)	(2,813)	(4,622)	(4,677)
Intersegment Eliminations [Member] | EMEA [Member]
Net sales
Net sales	(1,421)	(1,156)	(1,932)	(1,622)
Intersegment Eliminations [Member] | Asia-Pacific [Member]
Net sales
Net sales	$ (4,812)	$ (3,910)	$ (8,465)	$ (6,004)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	29.00%	24.00%	31.00%	26.00%
U.S. federal statutory tax rate	21.00%	21.00%	21.00%	21.00%
Changes in the valuation allowances			$ 0		$ 0
Changes in balances of unrecognized tax benefits			$ 0		$ 0

Product Warranty Reserve - Roll

Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period balance	$ 1,282	$ 1,309
Additions charged to income	1,325	48
Warranty usage	(244)	(28)
Currency translation	0	(87)
End of period balance	$ 2,363	$ 1,242

Debt Arrangements - Additional

Debt Arrangements - Additional Information (Detail) - USD ($)		Jan. 19, 2021	Apr. 17, 2020	Aug. 14, 2019	Apr. 25, 2019	Aug. 22, 2016	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Sep. 30, 2020
Debt Instrument [Line Items]
Line of credit utilized borrowing capacity							$ 16,800,000
Debt to earnings before Interest, Taxes and Depreciation ratio			225.00%
Line of credit remaining borrowing capacity							45,200,000
Letters of credit outstanding amount							100,000
Proceeds from long-term debt	[1]						42,954,000	$ 41,163,000
U.S. [Member]
Debt Instrument [Line Items]
Borrowings							$ 5,900,000
Expiration date							Jun. 30, 2024
Interest rate for Line of credit							1.236%
Asia Pacific [Member]
Debt Instrument [Line Items]
Restricted cash used to secure bank debt							$ 300,000		$ 600,000
LIBOR [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus			1.125%
LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus			1.50%
Austrian Subsidiary [Member]
Debt Instrument [Line Items]
Interest rate							1.216%
Increased borrowing capacity			$ 65,000,000
Extended debt instrument date			Jun. 30, 2024			Jun. 30, 2021
Borrowings							$ 600,000
Expiration date							Jun. 30, 2024
Polish Subsidiary [Member]
Debt Instrument [Line Items]
Borrowings							$ 6,600,000
Interest rate for Line of credit							1.305%
Polish Subsidiary [Member] | Warsaw Interbank Offer Rate [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus							1.125%
Expiration date							Jun. 30, 2024
Australian Subsidiary [Member]
Debt Instrument [Line Items]
Borrowings							$ 3,700,000
Interest rate for Line of credit							1.15%
Expiration date							Jun. 30, 2024
Indonesian Subsidiary [Member]
Debt Instrument [Line Items]
Interest rate					3.501%
Line of credit utilized borrowing capacity							$ 6,300,000
Outstanding letters of credit, current							$ 800,000
Expiration date					Apr. 30, 2024
Proceeds from long-term debt					$ 8,000,000
New Zealand Subsidiary {Member}
Debt Instrument [Line Items]
Interest rate				3.90%			3.15%
Outstanding letters of credit, current							$ 3,800,000
Expiration date				Aug. 26, 2021
Proceeds from long-term debt				$ 5,300,000
Corporate Aircraft [Member]
Debt Instrument [Line Items]
Debt instrument, face amount										$ 6,800,000
Corporate Aircraft [Member] | Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 20,500,000
Debt instrument, payment terms		120 months
Interest rate		2.744%
Debt instrument, frequency of periodic payment		The loan is payable in 119 equal monthly installments
Debt instrument, date of first required payment		Mar. 1, 2021
Debt instrument, description							The loan is payable in 119 equal monthly installments, which commenced on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date.
Line of credit utilized borrowing capacity							$ 19,800,000
Outstanding letters of credit, current							$ 2,100,000
[1]	Non-cash investing and financing activities:  The Company purchased a new corporate aircraft during six-month period ended June 30, 2021 with a term loan in the principal amount of $20.5 million.  For further information regarding this transaction, refer to Note P, “Debt Arrangements.

Leases - Additional Information

Leases - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2021USD ($)
Leases [Line Items]
Leases, term of description	the leases in effect were related to land, buildings, vehicles, office equipment and other production equipment under operating leases with lease terms of up to 99 years.
Finance lease, weighted average remaining lease term	3 years
Operating lease, weighted average remaining lease term	17 years 10 months 24 days
Operating lease, weighted average discount rate, percent	4.92%
Finance lease, weighted average discount rate, percent	4.14%
Total minimum sublease rentals under noncancelable subleases	$ 2.1
Maximum [Member]
Leases [Line Items]
Leases, term of contract	99 years

Leases - Summary of Components

Leases - Summary of Components of Lease Expense (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Components of lease expense
Operating lease cost	$ 1,483	$ 1,442
Finance lease cost
Amortization of right-of-use assets	205	32
Interest on lease liabilities	16	5
Total lease cost	$ 1,704	$ 1,479

Leases - Schedule of Future Mat

Leases - Schedule of Future Maturities of Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2021USD ($)
Operating Leases
2021	$ 1,241
2022	2,342
2023	1,688
2024	988
2025 and thereafter	11,098
Total lease payments	17,357
Less amount of lease payment representing interest	6,047
Total present value of lease payments	11,310
Finance Leases
2021	202
2022	231
2023	130
2024	81
2025 and thereafter	88
Total lease payments	732
Less amount of lease payment representing interest	45
Total present value of lease payments	$ 687

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,440	$ 1,341
Operating cash flows from finance leases	16	5
Financing cash flows from finance leases	$ 209	$ 57

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - $ / shares	Jun. 15, 2021	Jun. 09, 2021	Mar. 15, 2021	Mar. 10, 2021	Feb. 03, 2021	Jan. 04, 2021
Retired Officer [Member]
Related Party Transaction [Line Items]
Purchase of shares						1,160
Shares price per share						$ 66.01
Number of trading days to be considered for average price of stock repurchased						30 days
Current Officers and Retired Officer [Member]
Related Party Transaction [Line Items]
Purchase of shares					29,676
Shares price per share					$ 69.19
Number of trading days to be considered for average price of stock repurchased					30 days
Officer [Member]
Related Party Transaction [Line Items]
Purchase of shares	10,000			19,497
Shares price per share	$ 75.87			$ 71.10
Number of trading days to be considered for average price of stock repurchased	30 days			30 days
Employee [Member]
Related Party Transaction [Line Items]
Purchase of shares		1,500	2,257
Shares price per share		$ 74.09	$ 71.91
Number of trading days to be considered for average price of stock repurchased		30 days	30 days