Preformed Line Products (PLPC) 10-K 5 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 01, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Trading Symbol	PLPC
Entity Registrant Name	Preformed Line Products Company
Entity Central Index Key	0000080035
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell company	false
Entity Common Stock, Shares Outstanding		4,932,008
Entity Public Float			$ 115,197,295
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 Annual Report	true
Document Transition Report	false
Title of 12(b) Security	Common Shares, $2 par value per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	OH
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	Portions of the Definitive Proxy Statement for the Annual Meeting of Shareholders to be held May 5, 2020 are incorporated by reference into Part III, Items 10, 11, 12, 13 and 14.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 45,175	$ 38,929
Accounts receivable, less allowances of $3,464 ($3,849 in 2019)	92,686	83,517
Inventories - net	97,537	95,718
Prepaids	15,289	6,921
Prepaid taxes	2,371	2,601
Other current assets	3,256	4,289
TOTAL CURRENT ASSETS	256,314	231,975
Property, plant and equipment - net	125,965	124,018
Operating lease, right-of-use assets	13,139	12,453
Intangibles - net	14,443	15,116
Goodwill	29,508	27,840
Deferred income taxes	10,863	7,564
Other assets	10,855	14,605
TOTAL ASSETS	461,087	433,571
LIABILITIES AND SHAREHOLDERS' EQUITY
Trade accounts payable	31,646	28,282
Notes payable to banks	17,428	8,696
Operating lease liabilities, current	2,240	2,062
Current portion of long-term debt	5,216	3,354
Accrued compensation and amounts withheld from employees	14,736	11,817
Accrued expenses and other liabilities	17,508	16,718
Accrued profit-sharing and other benefits	8,252	7,213
Dividends payable	1,292	1,173
Income taxes payable	5,456	1,758
TOTAL CURRENT LIABILITIES	103,774	81,073
Long-term debt, less current portion	33,333	53,722
Unfunded pension obligation	5,826	5,278
Operating lease liabilities, non-current	8,743	8,246
Deferred income taxes	2,921	3,116
Other noncurrent liabilities	14,421	13,568
Shareholders' equity:
Common shares - $2 par value per share, 15,000,000 shares authorized, 4,902,233 and 4,992,979 issued and outstanding, at December 31, 2020 and December 31, 2019, respectively	13,028	12,848
Common shares issued to rabbi trust, 265,508 and 267,641 shares at December 31, 2020 and December 31, 2019, respectively	(10,940)	(10,981)
Deferred compensation liability	10,940	10,981
Paid-in capital	43,134	38,854
Retained earnings	379,035	353,292
Treasury shares, at cost, 1,611,927 and 1,431,235 shares at December 31, 2020 and December 31, 2019, respectively	(88,568)	(79,106)
Accumulated other comprehensive loss	(54,551)	(57,353)
TOTAL PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS' EQUITY	292,078	268,535
Noncontrolling interest	(9)	33
TOTAL SHAREHOLDERS' EQUITY	292,069	268,568
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 461,087	$ 433,571

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Accounts receivable, less allowances	$ 3,464	$ 3,849
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	4,902,233	4,992,979
Common stock, shares outstanding	4,902,233	4,992,979
Common stock, shares issued to rabbi trust	265,508	267,641
Treasury stock shares	1,611,927	1,431,235

Statements of Consolidated Inco

Statements of Consolidated Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 466,449	$ 444,861	$ 420,878
Cost of products sold	312,436	304,266	288,647
GROSS PROFIT	154,013	140,595	132,231
Costs and expenses
Selling	35,637	36,609	36,358
General and administrative	56,335	51,806	45,398
Research and engineering	17,625	17,187	15,107
Other operating expenses - net	4,209	2,366	2,434
Total costs and expenses	113,806	107,968	99,297
OPERATING INCOME	40,207	32,627	32,934
Other income (expense)
Interest income	259	783	486
Interest expense	(2,396)	(2,217)	(1,290)
Other income	2,501	265	458
Total other income (expense)	364	(1,169)	(346)
INCOME BEFORE INCOME TAXES	40,571	31,458	32,588
Income taxes	10,810	8,122	6,007
NET INCOME	29,761	23,336	26,581
Net income (loss) attributable to noncontrolling interests	42	(33)	0
NET INCOME ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS	$ 29,803	$ 23,303	$ 26,581
AVERAGE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING:
Basic	4,923	5,031	5,032
Diluted	4,984	5,087	5,107
EARNINGS PER SHARE OF COMMON STOCK ATTRIBUTABLE TO PREFORMED LINE PRODUCTS COMPANY SHAREHOLDERS:
Basic	$ 6.05	$ 4.63	$ 5.28
Diluted	$ 5.98	$ 4.58	$ 5.21

Statements of Consolidated Comp

Statements of Consolidated Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive Income Net Of Tax [Abstract]
Net income	$ 29,761	$ 23,336	$ 26,581
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	3,835	2,028	(12,285)
Recognized net actuarial gains	363	397	386
Loss on unfunded pension obligations	(1,396)	(195)	(244)
Other comprehensive income (loss), net of tax	2,802	2,230	(12,143)
Less: Comprehensive income attributable to noncontrolling interests	42	(33)	0
Comprehensive income attributable to Preformed Line Products Company shareholders	$ 32,605	$ 25,533	$ 14,438

Statements of Consolidated Cash

Statements of Consolidated Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net income	$ 29,761	$ 23,336	$ 26,581
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	13,838	13,748	12,444
Provision for accounts receivable allowances	2,053	2,132	1,206
Provision for inventory reserves	2,035	1,283	2,402
Deferred income taxes	(3,380)	(1,274)	314
Share-based compensation expense	4,089	4,396	4,236
Loss (gain) on sale of property and equipment	1,108	10	(156)
Other - net	6	292	192
Changes in operating assets and liabilities assets:
Accounts receivable	(10,539)	(9,777)	(4,499)
Inventories	80	(9,455)	(13,703)
Prepaid expenses	(8,786)	(932)	(3,723)
Trade accounts payables and accrued liabilities	6,952	6,087	3,048
Income taxes, net	3,470	634	(1,896)
Contributions to company pension plan	(330)	0	(5,340)
Other - net	1,285	(3,263)	1,870
NET CASH PROVIDED BY OPERATING ACTIVITIES	41,642	27,217	22,976
INVESTING ACTIVITIES
Capital expenditures	(24,569)	(29,467)	(9,528)
Proceeds from the sale of property and equipment	10,525	54	195
Purchase of marketable securities	0	(496)	(4,690)
Proceeds from sale of marketable securities	0	2,309	2,953
Purchase of company owned life insurance policies	0	(2,309)	(2,953)
Acquisition of businesses, net of cash	0	(18,894)	0
NET CASH USED IN INVESTING ACTIVITIES	(14,044)	(48,803)	(14,023)
FINANCING ACTIVITIES
Increase (decrease) in notes payable to banks	9,465	(355)	8,446
Proceeds from long-term debt	90,847	93,036	76,030
Payments of long-term debt	(110,083)	(64,124)	(85,496)
Dividends paid	(4,184)	(4,230)	(4,088)
Proceeds from issuance of common shares	252	213	222
Purchase of common shares for treasury	(5,836)	(2,800)	(191)
Purchase of common shares for treasury from related parties	(3,626)	(4,026)	(3,974)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(23,165)	17,714	(9,051)
Effects of exchange rate changes on cash and cash equivalents	1,479	(775)	(1,591)
Net increase (decrease) in cash, cash equivalents and restricted cash	5,912	(4,647)	(1,689)
Cash, cash equivalents and restricted cash at beginning of year	39,263	43,910	45,599
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR	$ 45,175	$ 39,263	$ 43,910

Statements of Consolidated Shar

Statements of Consolidated Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Common Shares Issued to Rabbi Trust [Member]	Deferred Compensation Liability [Member]	Paid In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Cumulative Translation Adjustment [Member]	Unrecognized Pension Benefit Cost [Member]	Total Preformed Line Products, Company Equity [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2017	$ 238,537	$ 12,593	$ (11,834)	$ 11,834	$ 29,734	$ 311,765	$ (68,115)	$ (41,425)	$ (6,015)	$ 238,537	$ 0
Net income	26,581					26,581				26,581
Foreign currency translation adjustment	(12,285)							(12,285)		(12,285)
Recognized net actuarial gain, net of tax provision of $139, $123 and $112 for 2018, 2019 and 2020 respectively	386								386	386
Loss on unfunded pension obligations, net of tax benefit of $77, $60 and $433 for 2018, 2019 and 2020 respectively	(244)								(244)	(244)
Total comprehensive income	14,438									14,438	0
Share-based compensation	4,084				4,236	(152)				4,084
Purchase of 52,318, 120,848 and 180,692 common shares for 2018, 2019 and 2020 respectively	(4,165)						(4,165)			(4,165)
Issuance of 34,521, 88,377 and 89,946 common shares for 2018, 2019 and 2020 respectively	500	69			431					500
Common shares distributed from rabbi trust of 19,396, 1,989 and 2,133 for 2018, 2019 and 2020 net	0		826	(826)						0
Cash dividends declared $.80, $.80 and $.80 per share for 2018, 2019 and 2020 respectively	(4,024)					(4,024)				(4,024)
Ending Balance at Dec. 31, 2018	249,370	12,662	(11,008)	11,008	34,401	334,170	(72,280)	(53,710)	(5,873)	249,370	0
Net income	23,336					23,303				23,303	33
Foreign currency translation adjustment	2,028							2,028		2,028
Recognized net actuarial gain, net of tax provision of $139, $123 and $112 for 2018, 2019 and 2020 respectively	397								397	397
Loss on unfunded pension obligations, net of tax benefit of $77, $60 and $433 for 2018, 2019 and 2020 respectively	(195)							0	(195)	(195)
Total comprehensive income	25,566									25,533	33
Share-based compensation	4,229				4,396	(167)				4,229
Purchase of 52,318, 120,848 and 180,692 common shares for 2018, 2019 and 2020 respectively	(6,826)						(6,826)			(6,826)
Issuance of 34,521, 88,377 and 89,946 common shares for 2018, 2019 and 2020 respectively	243	186			57					243
Common shares distributed from rabbi trust of 19,396, 1,989 and 2,133 for 2018, 2019 and 2020 net	0		27	(27)						0
Cash dividends declared $.80, $.80 and $.80 per share for 2018, 2019 and 2020 respectively	(4,014)					(4,014)				(4,014)
Ending Balance at Dec. 31, 2019	268,568	12,848	(10,981)	10,981	38,854	353,292	(79,106)	(51,682)	(5,671)	268,535	33
Net income	29,761					29,803				29,803	(42)
Foreign currency translation adjustment	3,835							3,835		3,835
Recognized net actuarial gain, net of tax provision of $139, $123 and $112 for 2018, 2019 and 2020 respectively	363								363	363
Loss on unfunded pension obligations, net of tax benefit of $77, $60 and $433 for 2018, 2019 and 2020 respectively	(1,396)							0	(1,396)	(1,396)
Total comprehensive income	32,563									32,605	(42)
Share-based compensation	3,941				4,089	(148)				3,941
Purchase of 52,318, 120,848 and 180,692 common shares for 2018, 2019 and 2020 respectively	(9,462)						(9,462)			(9,462)
Issuance of 34,521, 88,377 and 89,946 common shares for 2018, 2019 and 2020 respectively	371	180			191					371
Common shares distributed from rabbi trust of 19,396, 1,989 and 2,133 for 2018, 2019 and 2020 net	0		41	(41)						0
Cash dividends declared $.80, $.80 and $.80 per share for 2018, 2019 and 2020 respectively	(3,912)					(3,912)				(3,912)
Ending Balance at Dec. 31, 2020	$ 292,069	$ 13,028	$ (10,940)	$ 10,940	$ 43,134	$ 379,035	$ (88,568)	$ (47,847)	$ (6,704)	$ 292,078	$ (9)

Statements of Consolidated Sh_2

Statements of Consolidated Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Tax provision (benefit) for recognized net actuarial loss (gain)	$ 112	$ 123
Tax provision (benefit)	$ (433)	$ (60)
Common Shares [Member]
Issuance of common shares	89,946	88,377	34,521
Common Shares Issued to Rabbi Trust [Member]
Common shares distributed from rabbi trust	2,133	1,989	19,396
Deferred Compensation Liability [Member]
Common shares distributed from rabbi trust	2,133	1,989	19,396
Paid In Capital [Member]
Issuance of common shares	89,946	88,377	34,521
Retained Earnings [Member]
Cash dividends declared per share	$ 0.80	$ 0.80	$ 0.80
Treasury Stock [Member]
Purchase of common shares	180,692	120,848	52,318
Unrecognized Pension Benefit Cost [Member]
Tax provision (benefit) for recognized net actuarial loss (gain)	$ 112	$ 123	$ 139
Tax provision (benefit)	$ (433)	$ (60)	$ (77)

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	Note A - Significant Accounting Policies Nature of Operations Preformed Line Products Company and subsidiaries (the “Company”) is a designer and manufacturer of products and systems employed in the construction and maintenance of overhead and underground networks for the energy, telecommunication, cable operators, data communication and other similar industries. The Company’s primary products support, protect, connect, terminate and secure cables and wires. The Company also provides solar hardware systems and mounting hardware for a variety of solar power applications. The Company’s customers include public and private energy utilities and communication companies, cable operators, governmental agencies, contractors and subcontractors, distributors and value-added resellers. The Company serves its worldwide markets through strategically located domestic and international manufacturing facilities. Principles of Consolidation and Noncontrolling Interests The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries for which it has a controlling interest. All intercompany accounts and transactions have been eliminated upon consolidation. 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 our Consolidated Financial Statements. Additionally, the Company’s Consolidated Financial Statements include 100% of a controlled subsidiary’s earnings, rather than only our 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. Cash and Cash Equivalents Cash, cash equivalents and restricted cash (“Cash”) are stated at fair value and consist of highly liquid investments with original maturities of three months or less at the time of acquisition. Restricted cash is included on the Cash and cash equivalents on the Company’s Consolidated Balance Sheets. Allowances for Doubtful Accounts The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Prior to the adoption of Financial Accounting Standards Board (“FASB”) ASU 2016-13 “Financial Instruments – Credit Losses (Topic 326), the allowances for uncollectible accounts receivable were based upon the number of days the accounts are past due, the current business and macroeconomic environment, geographic considerations and specific information such as bankruptcy or liquidity issues of its customers. Rather than recognizing losses when they are deemed to be probable, the Company now uses a current expected credit loss model in order to immediately recognize an estimate of credit losses that are expected to occur over the life of the financial instruments, mainly trade receivables. Additionally, the allowance is based upon identified delinquent accounts, customer payment patterns and other analyses of historical data trends. The Company also maintains an allowance for future sales credits related to sales recorded during the year. The estimated allowance is based on historical sales credits issued in the subsequent year related to the prior year and any significant, preapproved open return good authorizations as of the balance sheet date. Inventories The Company uses the last-in, first-out (“LIFO”) method of determining cost for the majority of its material portion of inventories in PLP-USA. All other inventories are determined by the first-in, first-out (“FIFO”) or average cost methods. Inventories are carried at net realizable value. Reserves are maintained for estimated obsolescence or excess inventory based on past usage and future demand. Fair Value of Financial Instruments Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) 825, “Disclosures about Fair Value of Financial Instruments,” requires disclosures of the fair value of financial instruments. The estimated fair value of financial instruments was principally based on market prices where such prices were available, and when unavailable, fair values were estimated based on market prices of similar instruments. Property, Plant and Equipment and Depreciation Property, plant, and equipment is recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives. The estimated useful lives used, when purchased new, are: land improvements, ten years; buildings, forty years; building improvements, five to forty years; machinery and equipment, three to ten years; and aircraft, fifteen years. Appropriate reductions in estimated useful lives are made for property, plant and equipment purchased in connection with an acquisition of a business or in a used condition when purchased. Long-Lived Assets The Company records impairment losses on long-lived assets used in operations when events and circumstances indicate that the carrying value of the assets are impaired and the undiscounted future cash flows estimated to be generated by such assets are less than the carrying value. The Company’s cash flows are based on historical results adjusted to reflect the Company’s best estimate of future market and operating conditions. The net carrying value of assets not recoverable is then reduced to fair value. The estimate of fair value represents the Company’s best estimate based on industry trends and reference to market rates and transactions. The Company did not record any impairment to long-lived assets during the years ended December 31, 2020 and 2019. Goodwill and Other Intangibles Goodwill and other intangible assets generally result from business acquisitions. Goodwill is not subject to amortization but is subject to annual impairment testing. Intangible assets with definite lives, consisting primarily of purchased customer relationships, patents, technology, customer backlogs, trademarks and land use rights, are generally amortized over periods from less than one year to twenty years. The Company’s intangible assets with finite lives are generally amortized over the period in which the economic benefits of the intangibles are consumed, using either a projected cash flow basis method or the straight-line method. The straight-line method is used in circumstances in which it better reflects the pattern in which the economic benefits of the intangible asset are consumed or otherwise expire compared to using a projected cash flow basis method. An evaluation of the remaining useful life of intangible assets with a determinable life is performed on a periodic basis and when events and circumstances warrant an evaluation. The Company assesses intangible assets with a determinable life for impairment consistent with its policy for assessing other long-lived assets. Goodwill and intangible assets are also reviewed for impairment annually or more frequently when changes in circumstances indicate the carrying amount may be impaired, or in the case of finite-lived intangible assets, when the carrying amount may not be recoverable. Events or circumstances that would result in an impairment review primarily include operations reporting losses or a significant change in the use of an asset. Impairment charges are recognized pursuant to FASB ASC 350-20, “Goodwill.” The Company performs its annual impairment test for goodwill utilizing a combination of the income approach, which uses a discounted cash flow methodology, and the market approach, which uses comparable market multiples, 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 with its carrying value to assess if goodwill has been impaired. The fair value estimates are subjective and sensitive to significant assumptions, such as revenue growth rates, operating margins, the weighted-average cost of capital (WACC), and estimated market multiples, of which are affected by expectations of future market or economic conditions. The Company believes that the methodologies, significant assumptions, and weightings used are reasonable and result in appropriate fair values of the reporting units. The Company performed its annual impairment test for goodwill as of October 1, 2020 and 2019 and determined that no adjustment to the carrying value was required for the years ended December 31, 2020 and 2019. 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. Research and Development Research and development costs for new products are expensed as incurred and totaled $2.8 million in 2020, $3.0 million in 2019 and $2.4 million in 2018. Income Taxes Income taxes are computed in accordance with the provisions of FASB ASC 740, “Income taxes” and includes U.S. (federal and state) and foreign income taxes. In the Consolidated Financial Statements, the benefits of a consolidated return have been reflected where such returns have or could be filed based on the entities and jurisdictions included in the financial statements. Provisions of the U.S. Tax Cuts and Jobs Act ("U.S. Tax Act") became effective for the Company in 2018. The Foreign-Derived Intangible Income (“FDII”) provision generates a deduction against the Company’s U.S. taxable income for U.S. earnings derived offshore that utilize intangibles held by the Company in the U.S. Conversely, the Global Intangible Low-Taxed Income (“GILTI”) provision requires the Company to subject to U.S. taxation a portion of its foreign subsidiary earnings that exceed an allowable return. The Company elects to treat any Global Intangible Low-Taxed Income (“GILTI”) inclusion as a period expense in the year incurred. Deferred Tax Assets Deferred taxes are recognized at currently enacted tax rates for temporary differences between the financial reporting and income tax basis of assets and liabilities and operating loss and tax credit carryforwards. The Company establishes a valuation allowance to record deferred tax assets at an amount that is more-likely-than-not to be realized. In the event the Company were to determine that it would be able to realize our deferred tax assets in the future in excess of the recorded amount, an adjustment to the valuation allowance would increase income in the period such determination was made. Likewise, should the Company determine that it would not be able to realize all or part of the net deferred tax assets in the future, an adjustment to the valuation allowance would be charged to expense in the period such determination was made. Uncertain Tax Positions The Company identifies tax positions taken on the federal, state, local and foreign income tax returns filed or to be filed. A tax position can include: a reduction in taxable income reported in a previously filed tax return or expected to be reported on a future tax return that impacts the measurement of current or deferred income tax assets or liabilities in the period being reported; a decision not to file a tax return; an allocation or a shift of income between jurisdictions; the characterization of income or a decision to exclude reporting taxable income in a tax return; or a decision to classify a transaction, entity or other position in a tax return as tax exempt. The Company determines whether a tax position is an uncertain or a routine business transaction tax position that is more-likely-than-not to be sustained at the full amount upon examination. Under FASB ASC 740, “Tax Benefits from Uncertain Tax Positions” that reduce our current or future income tax liability are reported in our financial statements only to the extent that each benefit is recognized and measured under a two-step approach. The first step requires us to assess whether each tax position based on its technical merits and facts and circumstances as of the reporting date, is more-likely-than-not to be sustained upon examination. The second step measures the amount of tax benefit that we would recognize in the financial statements based on a cumulative probability approach. A tax position that meets the more-likely-than-not threshold that is not highly certain is measured based on the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority, assuming that the tax authority has examined the position and has full knowledge of all relevant information. ASC 740 requires subjectivity to identify outcomes and to assign probability in order to estimate the settlement amount. The Company provides estimates in order to determine settlement amounts. During the year ended December 31, 2020, the Company recorded $.1 million of reserves for uncertain tax positions. Advertising Advertising costs are expensed as incurred and totaled $.3 million in 2020 and $1.9 million in both 2019 and 2018. Foreign Currency Translation Asset and liability accounts are translated into U.S. dollars using exchange rates in effect at the date of the Consolidated Balance Sheet. The translation adjustments are recorded in Accumulated other comprehensive income (loss). Revenues and expenses are translated at weighted average exchange rates in effect during the period. Transaction gains and losses arising from exchange rate changes on transactions denominated in a currency other than the functional currency are included in income and expense as incurred. Aggregate transaction losses, including hedge activity, for the years ended December 31, 2020, 2019 and 2018 were $1.0 million, Effective July 1, 2018, Argentina was designated as a highly inflationary economy as the projected three-year 2% Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. Business Combinations Upon acquisition of a business, the Company uses the income, market or cost approach (or a combination thereof) for the valuation as appropriate. The valuation inputs in these models and analyses are based on market participant assumptions. Market participants are considered to be buyers and sellers unrelated to the Company in the principal or most advantageous market for the asset or liability. In the event there is an earn-out associated with an acquisition, the Company uses a valuation model to measure the contingent consideration, which may include significant assumptions such as revenue projections and discount rates. The Company uses a discounted cash flow model to measure the useful lives of intangible assets. The significant assumptions used to estimate the fair value of the intangible assets include discount rates and certain assumptions that form the basis of future cash flows (such as revenue growth rates, attrition rates, and royalty rates). These assumptions relate to the future performance of the acquired businesses, are forward-looking and could be affected by future economic and market conditions. Fair value estimates are based on a series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. Management values property, plant and equipment using the cost approach supported where available by observable market data, which includes consideration of obsolescence. Acquired inventories are marked to fair value. For certain items, the carrying value is determined to be a reasonable approximation of fair value based on information available to the Company Derivative Financial Instruments 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 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. The Company records the contracts at fair value in the Consolidated Balance Sheets. The Company does not hold derivatives for trading purposes. Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes” (ASU 2019-12”) which simplifies certain specific aspects of ASC 740. ASU 2019-12 addresses the income tax accounting implications of hybrid tax regimes, which includes tax regimes that impose the greater of two taxes, one based on income or one based on items other than income, the treatment of tax basis step-up of goodwill in a transaction that does not qualify as a business combination, the application of the intra-period tax allocation rules in certain situations involving a valuation allowance, the income tax accounting impact on the change of the ownership of an investment from a subsidiary to an equity method investment and a change in an investment from an equity method investment to a subsidiary, income tax accounting related to interim reporting, including the treatment of enacted changes in tax law during interim periods and the treatment of year-to-date loss limitations. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim periods therein. Early adoption of the standard is permitted, including adoption in interim or annual periods for which financial statements have not been issued. The Company has not adopted ASU 2019-12, as ASU 2019-12 would not have a material effect on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which will modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, including the removal of certain disclosure requirements. The amendments in ASU 2018-13 are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company adopted the new disclosure requirements beginning in the period ending March 31, 2020. The additional components of this release did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans (“Topic 715”). ASU 2018-14 modifies disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Among other requirements, the ASU requires an entity to disclose the reasons for significant gains and losses related to changes in the benefit obligation. Refer to Note C to the Consolidated Financial Statements for further details. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (“Topic 326”): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes how entities will measure credit losses for most financial assets and other instruments that are not measured at fair value through net income. This update introduces the current expected credit loss (CECL) model, which will require an entity to measure credit losses for certain financial instruments and financial assets, including trade receivables. Under this update, on initial recognition and at each reporting period, an entity will be required to recognize an allowance that reflects the entity’s current estimate of credit losses expected to be incurred over the life of the financial instrument. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company has completed its evaluation process and the January 1, 2020 adoption did not have a material impact to the Company’s consolidated financial statements for the twelve months ended December 31, 2020 . New Accounting Standards To Be Adopted In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (“Topic 848”): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides for temporary optional expedients and exceptions to the current guidance on certain contract modifications and hedging relationships to ease the burdens related to the expected market transition from the London Inter-bank Offered Rate (“LIBOR”) or other reference rates to alternative reference rates. The guidance is available 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 at the completion of that analysis.

Other Financial Statement Infor

Other Financial Statement Information	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Other Financial Statement Information	Note B - Other Financial Statement Information Inventories – net December 31 2020 2019 Raw materials $ 53,947 $ 49,729 Work-in-process 9,272 9,352 Finished products 38,801 45,760 102,020 104,841 Excess of current cost over LIFO cost (4,483 ) (4,667 ) Noncurrent portion of inventory 0 (4,456 ) $ 97,537 $ 95,718 Costs for inventories of certain material are determined using the LIFO method and totaled approximately $32.0 million at each of the years ended December 31, 2020 and 2019. The Company’s reserves for slow-moving and obsolete inventory at December 31, 2020 and 2019 were $9.9 million and $8.9 million, respectively. Noncurrent portion of inventory is included in Other assets on the Company’s Consolidated Balance Sheets. Property and equipment – net Major classes of property, plant and equipment are as follows: December 31 2020 2019 Land and improvements $ 22,132 $ 22,218 Buildings and improvements 97,909 82,811 Machinery, equipment and aircraft 176,377 180,221 Construction in progress 9,563 9,460 305,981 294,710 Less accumulated depreciation (180,016 ) (170,692 ) $ 125,965 $ 124,018 Depreciation of property and equipment was $12.2 million in 2020, $12.3 million in 2019 and $12.1 million in 2018. Machinery, equipment and aircraft includes $.3 million of financing leases at both years ended December 31, 2020 and 2019. 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. During the year ended December 31, 2020, the Company 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.

Pension Plans

Pension Plans	12 Months Ended
	Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract]
Pension Plans	Note C - Pension Plans PLP-USA hourly employees of the Company who meet specific requirements as to age and length and date of service are covered by a defined benefit pension plan (“Plan”). On December 12, 2012, the Company approved a freeze on further benefit accruals under the Plan and notified the participants of the freeze on December 19, 2012. Beginning February 1, 2013, participants ceased earning additional benefits under the Plan and no new participants entered the Plan. The Company uses a December 31 measurement date for its Plan. Net periodic pension cost for the Plan consists of the following components for the year ended December 31: 2020 2019 2018 Service cost $ 0 $ 299 $ 250 Interest cost 1,301 1,411 1,349 Expected return on plan assets (2,251 ) (1,946 ) (1,985 ) Recognized net actuarial loss 475 520 525 Net periodic pension cost $ (475 ) $ 284 $ 139 The following tables set forth benefit obligations, plan assets and the accrued benefit cost of the Plan at December 31: 2020 2019 Projected benefit obligation at beginning of the year $ 37,936 $ 33,931 Service cost 0 299 Interest cost 1,301 1,411 Actuarial loss (gain) 4,590 3,528 Benefits paid (1,245 ) (1,233 ) Projected benefit obligation at end of year $ 42,582 $ 37,936 Fair value of plan assets at beginning of the year $ 32,658 $ 28,672 Actual return on plan assets 5,013 5,219 Employer contributions 330 0 Benefits paid (1,245 ) (1,233 ) Fair value of plan assets at end of the year $ 36,756 $ 32,658 Unfunded pension obligation $ 5,826 $ 5,278 The actuarial loss in 2020 was primarily the result of a decrease in the Plan discount rate from 3.50% in 2019 to 2.69% in 2020. In accordance with ASC 715-20, the Company recognizes the underfunded status of the Plan as a liability. The amount recognized in Accumulated other comprehensive loss related to the Plan at December 31 is comprised of the following: 2020 2019 Balance at January 1 $ (5,671 ) $ (5,873 ) Reclassification adjustments: Pre-tax amortized net actuarial loss 475 520 Tax provision (112 ) (123 ) 363 397 Adjustment to recognize gain (loss) on unfunded pension obligations: Pre-tax loss (1,829 ) (255 ) Tax provision 433 60 (1,396 ) (195 ) Balance at December 31 $ (6,704 ) $ (5,671 ) The 2020 pre-tax unfunded pension obligation loss of $1.8 million included a loss of $5 million due to an .81% decrease in the discount rate to 2.69%, a gain of $.2 million associated with the industry updates to the mortality table used, a gain of $.2 million due to demographic changes combined and a gain of $2.8 million resulting from asset performance above the 6.50% rate of return assumption. There is no prior service cost to be amortized in the future. The Plan had accumulated benefit obligations in excess of Plan assets as follows: 2020 2019 Accumulated benefit obligation $ 42,582 $ 37,936 Fair market value of assets $ 36,756 $ 32,658 Weighted-average assumptions used to determine benefit obligations at December 31 2020 2019 Discount rate 2.69% 3.50% Rate of compensation increase n/a n/a Weighted-average assumptions used to determine net periodic benefit cost at December 31 2020 2019 2018 Discount rate 3.50% 3.50% 4.25% Rate of compensation increase n/a n/a n/a Expected long-term return on plan assets 7.00 7.00 8.00 The net periodic pension cost for 2020 was based on a long-term asset rate-of-return of 7.00%. This rate is based upon management’s estimate of future long-term rates of return on similar assets and is consistent with historical returns on such assets. During the year ended December 31, 2019, the Company changed its Plan asset base from a combined Level 1 and Level 2 allocation to utilize net asset value (“NAV”) as the practical expedient for its pooled investment funds and the assets are no longer classified in the fair value hierarchy. At December 31, 2020 and 2019, the Plan’s pooled investment funds were measured at fair value using the NAV. The NAV is based on the value of the assets owned by the plan, less liabilities. These pooled assets are not quoted on an active exchange. The fair value of the Plan assets as of December 31, 2020 and 2019, by category, are as follows: 2020 2019 Assets measured at net asset value Pooled investment fund $ 36,756 $ 32,658 Total $ 36,756 $ 32,658 The Plan weighted-average asset allocations at December 31, 2020 and 2019, by asset category, are as follows: Plan assets at December 31 2020 2019 Asset category Equity securities 47 % 48 % Debt securities 53 51 Cash and equivalents 0 1 100 % 100 % Management seeks to maximize the long-term total return of financial assets consistent with the fiduciary standards of ERISA. The ability to achieve these returns is dependent upon the need to accept moderate risk to achieve long-term capital appreciation. In recognition of the expected returns and volatility from financial assets, Plan assets are invested in the following ranges with the target allocation noted: Range Target Equities 40-60% 50% Fixed Income 40-60% 50% Cash Equivalents 0-10% 0.0% Investment in these markets is projected to provide performance consistent with expected long-term returns with appropriate diversification. The Company's policy is to fund amounts deductible for federal income tax purposes. The Company does not currently expect to contribute to the Plan in 2021. The benefits expected to be paid out of the Plan assets in each of the next five years and the aggregate benefits expected to be paid for the subsequent five years are as follows: Year Pension Benefits 2021 $ 1,273 2022 1,359 2023 1,449 2024 1,540 2025 1,616 2026-2030 9,344 The Company also provides retirement benefits through various defined contribution plans including PLP-USA’s Profit Sharing Plan. Expense for these defined contribution plans was $5.9 million in 2020, $4.9 million in 2019 and $5.6 million in 2018. Further, the Company also provides retirement benefits through the Supplemental Profit Sharing Plan. To the extent an employee’s award under PLP-USA’s Profit Sharing Plan exceeds the maximum allowable contribution permitted under existing tax laws, the excess is accrued for (but not funded) under a non-qualified Supplemental Profit Sharing Plan. The Supplemental Profit Sharing Plan allows participants the ability to hypothetically invest their proportionate award into various investment options, which primarily includes mutual funds. Expense for the Supplemental Profit Sharing Plan was $1.1

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income ("AOCI")	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income ("AOCI")	Note D - Accumulated Other Comprehensive Income (“AOCI”) The following tables set forth the total changes in AOCI by component, net of tax: Year Ended December 31, 2020 Year Ended December 31, 2019 Cumulative Cumulative Unrecognized Translation Unrecognized Translation Benefit Cost Adjustment Total Benefit Cost Adjustment Total Balance at January 1 $ (5,671 ) $ (51,682 ) $ (57,353 ) $ (5,873 ) $ (53,710 ) $ (59,583 ) Other comprehensive income before reclassifications: Gain (loss) on foreign currency translation adjustment 0 3,835 3,835 0 2,028 2,028 Loss on unfunded pension obligations (1,396 ) 0 (1,396 ) (195 ) 0 (195 ) Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial loss (a) 363 0 363 397 0 397 Net current period other comprehensive income (loss) (1,033 ) 3,835 2,802 202 2,028 2,230 Balance at December 31 $ (6,704 ) $ (47,847 ) $ (54,551 ) $ (5,671 ) $ (51,682 ) $ (57,353 ) (a) This AOCI component is included in the computation of net periodic pension costs as noted in Note C – Pension Plans.

Debt and Credit Arrangements

Debt and Credit Arrangements	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt and Credit Arrangements	Note E - Debt and Credit Arrangements December 31 2020 2019 Short-term debt Secured notes Thailand Bhat denominated at 3.60% $ 5,291 $ 3,670 Thailand Bhat denominated at 3.29% 2,384 1,882 Thailand Bhat denominated at 2.97% 957 0 France Euro denominated at 2.50% 6,142 0 Brazil Real denominated at 2.83% 0 1,152 Brazil Real denominated at 5.40% 1,854 752 Brazil Real denominated at 9.40% 0 1,240 Brazil Real denominated at 3.30% 800 0 Current portion of long-term debt U.S. dollar denominated at 2.71% 0 1,448 Austria Euro denominated at 2.48% 25 30 Austria Euro denominated at 1.40% 0 560 Austria Euro denominated at 3.00% 22 22 Indonesia U.S. Dollar denominated at 3.50% 800 800 New Zealand U.S. Dollar denominated at 3.25% 4,369 494 Total short-term debt 22,644 12,050 Long-term debt U.S. Dollar denominated at 1.27%, due 2024 12,706 21,552 U.S. Dollar denominated at 2.71%, due 2026 0 9,535 Brazilian Real denominated at 4.60% due 2022 68 147 Brazilian Real denominated at 8.30% due 2025 1,800 0 Poland Zloty denominated at 1.33% due 2024 6,696 6,524 Australian Dollar denominated at 1.15%, due 2024 5,288 5,526 Austria Euro denominated at 2.48% due 2022 25 0 Austria Euro denominated at 2.32% due 2030 128 224 Austria Euro denominated at 2.76% due 2022 67 0 Austria Euro denominated at 1.27% due 2024 614 560 Austria Euro denominated at 3.00% due 2025 121 134 Indonesia U.S Dollar denominated at 3.50% due 2024 6,667 7,467 New Zealand Dollar denominated at 3.25% due 2021 4,369 0 New Zealand Dollar denominated at 3.90% due 2021 0 5,407 Total long-term debt 38,549 57,076 Less current portion (5,216 ) (3,354 ) Total long-term debt, less current portion 33,333 53,722 Total debt $ 55,977 $ 65,772 On April 17, 2020, the Company extended the term on its $65.0 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 its 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 December 31, 2020, the Company’s Polish subsidiary had borrowed $6.7 million U.S. dollars at a rate of 1.125% plus the Warsaw Interbank Offer Rate with a term expiring June 30, 2024. At December 31, 2020, the Company’s Australian subsidiary had borrowed $5.3 million U.S. dollars, also with a term expiring June 30, 2024. At December 31, 2020, the interest rates on the U.S., Polish and Australian line of credit agreement were 1.269%, 1.325% and 1.145%, respectively. Under the credit facility, at December 31, 2020, the Company had utilized $25.4 million with $39.6 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 December 31, 2020, the Company was in compliance with these covenants. On December 22, 2020, the Company sold its corporate aircraft which had an outstanding balance of $8.1 million, of which $1.4 was classified as current. At December 31, 2020, the balance on this credit facility was zero. In September 2020, the company placed a $6.8 million deposit on a new corporate aircraft. Subsequently, in January 2021, the Company purchased the new corporate aircraft and the deposit was refunded and then included in the principal value of the loan. See Note Q for more information regarding this transaction. On February 28, 2019, the Company acquired its Austrian subsidiary, SubCon Electrical Fittings GmbH (“SubCon”), headquartered in Dornbirn, Austria. The Company’s Austrian subsidiary had a 1.0 million euros, or $1.1 million U.S. dollars line of credit with a term expiration of May 31, 2021 with the option to renew for an additional twelve months indefinitely. On June 26, 2020, the Company’s Austrian subsidiary borrowed $.6 million on the Company’s line of credit at an interest rate of 1.273%. The proceeds were used to repay the previously outstanding local line of credit. At repayment, the local line of credit was cancelled. 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 December 31, 2020, $6.7 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 December 31, 2020, $4.4 million was outstanding on this facility, all of which is classified as current and has an interest rate of 3.250%. This loan is secured by the Company’s New Zealand subsidiary’s land and building. The Company’s Asia Pacific segment had $.6 million and $.3 million in restricted cash at December 31, 2020 and 2019, respectively. The restricted cash was used to secure bank debt and is included in Cash and cash equivalents and Other current assets on the Company’s Consolidated Balance Sheets at December 31, 2020 and 2019, respectively. Aggregate maturities of long-term debt during the next five years are as follows: $22.6 million for 2021, $1.0 million for 2022, $.8 million for 2023, $26.1 million for 2024 and $5.4 million thereafter. Interest paid was $1.9 million in 2020, $2.0 million in 2019 and $1.8 million in 2018. Guarantees and Letters of Credit The Company has provided financial guarantees for uncompleted work and financial commitments. The terms of these guarantees vary with end dates ranging from the current year through the completion of such transactions. The guarantees would typically be triggered in the event of non-performance. As of December 31, 2020, the Company had total outstanding guarantees of $9.8 million. Additionally, certain domestic and foreign customers require the Company to issue letters of credit or performance bonds as a condition of placing an order. As of December 31, 2020, the Company had total outstanding letters of credit of $8.0 million.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Note F - Leases The Company adopted guidance effective in ASU 2016-02, “Leases (Topic 842)” on January 1, 2019. Adoption of this guidance did not change the Company’s balance sheet or income statement recognition of finance leases. As a result of adopting this guidance, the Company recorded short and long-term lease liabilities and corresponding right-of-use assets related to its operating leases. The Company regularly enters into leases in the normal course of business. As of December 31, 2020, 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 is 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 December 31, 2020 was 17.7 and 3.6 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 year ended December 31, 2020 were as follows: Year Ended December 31 2020 2019 Components of lease expense Operating lease cost $ 2,957 $ 3,138 Finance lease cost Amortization of right-of-use assets 66 67 Interest on lease liabilities 9 11 Total lease cost $ 3,032 $ 3,216 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 December 31, 2020 and December 31, 2019 was 4.46% and 4.33%, respectively. Future maturities of the Company’s lease liabilities as of December 31, 2020 are as follows: Year Ended December 31, 2020 Operating Leases Finance Leases 2021 $ 2,580 $ 83 2022 2,156 64 2023 1,482 60 2024 777 30 2025 and thereafter 9,928 19 Total lease payments $ 16,923 $ 256 Less amount of lease payment representing interest 5,940 19 Total present value of lease payments $ 10,983 $ 237 Amounts recognized as finance lease obligations are reported in Accrued expense and other liabilities and Other noncurrent liabilities in the Consolidated Balance sheets. The total minimum sublease rentals under noncancelable subleases to be received through 2023 is $2.6 million. Supplemental cash flow information related to leases for the year ended December 31, 2020 was as follows: Year Ended December 31 2020 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2,793 $ 5,321 Operating cash flows from finance leases 9 11 Financing cash flows from finance leases 118 100

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Note G - Income Taxes The Company recorded net tax provisions of $10.8 million, $8.1 million, and $6.0 million for the years ended December 31, 2020, 2019, and 2018, respectively. Cash taxes paid net of refunds were $7.7 million, $7.8 million, and $5.6 million for the years ending December 31, 2020, 2019, and 2018, respectively. Income before income taxes was derived from the following sources: 2020 2019 2018 United States $ 22,725 $ 11,353 $ 10,268 Foreign 17,846 20,105 22,320 $ 40,571 $ 31,458 $ 32,588 The components of income taxes for the years ended December 31 are as follows: 2020 2019 2018 Current Federal $ 7,909 $ 2,835 $ (904 ) Foreign 5,093 6,170 6,247 State and local 1,188 391 350 14,190 9,396 5,693 Deferred Federal (2,290 ) (10 ) 801 Foreign (445 ) (1,347 ) (608 ) State and local (645 ) 83 121 (3,380 ) (1,274 ) 314 Income taxes $ 10,810 $ 8,122 $ 6,007 The differences between the provision for income taxes at the U.S. federal statutory rate and the tax shown in the Statements of Consolidated Income for the years ended December 31 are summarized as follows: 2020 2019 2018 U. S. federal statutory tax rate 21% 21% 21% Federal tax at statutory rate $ 8,520 $ 6,606 $ 6,843 State and local taxes, net of federal benefit 942 308 273 U.S. federal permanent items 1,323 621 240 Global intangible low-taxed income 1,222 1,738 1,721 Foreign tax credits (1,204 ) (1,422 ) (1,707 ) Transition tax 0 0 (1,780 ) Non-U.S. tax rate variances 1,330 929 1,011 Valuation allowance (245 ) (346 ) (57 ) Tax credits (349 ) (464 ) (295 ) Tax act impact, deferred rate 0 0 (680 ) Other, net (729 ) 152 438 $ 10,810 $ 8,122 $ 6,007 Deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the tax basis of assets and liabilities and their carrying value for financial statement purposes. The tax effects of temporary differences that give rise to the Company’s deferred tax assets and liabilities at December 31 are as follows: 2020 2019 Deferred tax assets: Accrued compensation and benefits $ 1,518 $ 1,180 Inventory valuation reserves 2,535 2,384 Allowance for doubtful accounts 480 473 Benefit plan reserves 7,564 7,586 Net operating loss carryforwards 1,851 3,003 Other accrued expenses 3,825 3,012 Unrealized foreign exchange 799 718 Other 284 0 Gross deferred tax assets 18,856 18,356 Valuation allowance (2,912 ) (3,137 ) Net deferred tax assets 15,944 15,219 Deferred tax liabilities: Depreciation and other basis differences (4,514 ) (6,867 ) Intangibles (3,419 ) (3,742 ) Other (69 ) (162 ) Deferred tax liabilities (8,002 ) (10,771 ) Net deferred tax assets $ 7,942 $ 4,448 2020 2019 Change in net deferred tax assets: Deferred income tax expense Ordinary movement $ 3,380 $ 1,275 Deferred tax balances from business acquisition 0 (1,883 ) Items of other comprehensive income (loss) 319 (62 ) Currency translation (205 ) (71 ) Total change in net deferred tax assets $ 3,494 $ (741 ) Deferred taxes are recorded at a rate at which such items are expected to reverse based on currently enacted tax rates for temporary differences between the financial reporting and income tax basis of assets and liabilities and operating loss and tax credit carryforwards. At December 31, 2020, the Company had $7.0 million of foreign net operating loss carryforwards of which $5.4 million has an indefinite carryforward and $1.6 million will expire between the years 2024 and 2030. The Company assesses the available positive and negative evidence to determine if it is more likely than not sufficient future taxable income will be generated to utilize the existing deferred tax assets by jurisdiction. Based on this evaluation, the Company has established a valuation allowance of $2.9 million at December 31, 2020 in order to measure only the portion of the deferred tax asset that is more likely than not to be realized. The net decrease in the valuation allowance during the year was $.3 million, of which $.2 million impacts the income tax provision and the remainder relates to currency translation. The Company considers the majority of the earnings in our non-U.S. subsidiaries to be permanently reinvested and accordingly did not record any associated deferred income taxes on such earnings. Accordingly, the Company intends to continue to invest approximately $115.8 million of such earnings, as well as our capital in these subsidiaries, indefinitely outside of the U.S. The Company is subject to taxation in the U.S. and various state and foreign jurisdictions. As of December 31, 2020, with few exceptions, the Company is no longer subject to U.S. federal examinations by tax authorities for years before 2015 and state, local or foreign examinations by tax authorities for years before 2014. The following is a tabular reconciliation of the total amounts of unrecognized tax benefits related to uncertain tax positions, excluding interest and penalties, for the year ended December 31: 2020 2019 2018 Balance at January 1 $ 118 $ 0 $ 0 Additions for tax positions of current year 0 0 0 Additions for tax positions of prior years 0 118 0 Reductions for tax positions of prior years 0 0 0 Expiration of statutes of limitations (52 ) 0 0 Balance at December 31 $ 66 $ 118 $ 0 The Company records accrued interest as well as penalties related to unrecognized tax benefits as part of the provision for income taxes. During the year ended December 31, 2020, the 2016 portion of the Company’s uncertain tax position in the amount of $.1 million expired due to the stature of limitation taking effect. The Company had no significant activity with regard to unrecognized tax benefits. The Company had less than $.1 million of accrued interest and penalties as of December 31, 2020 and 2019. There was no accrued interest or penalties as of December 31, 2018. The remaining balance of $.1 million will expire within the next twelve months due to the statute of limitations .

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	Note H - 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 were reserved for share options. The Preformed Line Products Company 2016 Incentive Plan (the “Incentive Plan”) was put in place 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. As of December 31, 2020, 40,500 options and 316,685 restricted shares have been granted under the Incentive Plan. 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, however, the participant must remain employed with the Company until the restrictions on the RSUs lapse. The fair value of RSUs is based on the market price of a common share on the grant date. Dividends declared are accrued. A summary of the RSUs for the year ended December 31, 2020 is as follows: Restricted Share Awards Performance Total Weighted-Average and Service Service Restricted Grant-Date Required Required Awards Fair Value Nonvested as of January 1, 2020 196,342 15,292 211,634 $ 53.68 Granted 71,539 9,547 81,086 54.25 Vested (73,053 ) (6,290 ) (79,343 ) 56.13 Forfeited (11,051 ) (2,763 ) (13,814 ) 61.29 Nonvested as of December 31, 2020 183,777 15,786 199,563 $ 60.33 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. Annual compensation expense related to the time-based RSUs for the years ended December 31, 2020, 2019 and 2018 was $.4 million, $.5 million and $.5 million, respectively. During the year ended December 31, 2020, a former Officer of the Company forfeited 2,763 RSUs granted during 2020, 2019 and 2018. As of December 31, 2020, there was $.5 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 1.7 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 pre-tax income and sales growth over a requisite performance period. Depending on the extent to which the performance criteria are satisfied under the LTIP, the participants are eligible to earn common shares over the vesting period. Performance-based compensation expense for the years ended December 31, 2020, 2019 and 2018 was $3.5 million, $3.9 million and $3.7 million, respectively. During the year ended December 31, 2020, a former Officer of the Company forfeited 11,051 RSUs granted during 2020, 2019 and 2018. As of December 31, 2020, the remaining performance-based RSUs compensation expense of $3.6 million is expected to be recognized over a period of approximately 1.7 years. The excess tax benefits from service and performance-based RSUs was $.4 million, $.5 million and $.2 million for the years ended December 31, 2020, 2019 and 2018, respectively. This represents the reduction in income taxes otherwise payable during the period attributable to the actual gross tax benefits in excess of the expected tax benefits for restricted shares vested in the current period . In the event of a Change in Control (as defined in the LTIP and Incentive Plan), vesting of the RSUs will be accelerated and all restrictions will lapse. Nonvested performance-based awards are based on a maximum target potential payout. Actual shares awarded at the end of the performance period may be less than the maximum potential payout level depending on achievement of performance-based award objectives. To satisfy the vesting of its RSUs, the Company has reserved new shares from its authorized but unissued shares. Any additional granted awards will also be issued from the Company’s authorized but unissued shares. 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 stock 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 December 31, 2020, 265,508 LTIP shares have been deferred and are being held by the rabbi trust. 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 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. Forfeitures have been estimated to be zero. There were 25,500 options granted during the year ended December 31, 2020 and 5,000 granted in both years ended December 31, 2019 and 2018. The fair values for the stock options granted were estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions: 2020 2019 2018 Risk-free interest rate 1.8 % 1.8 % 2.8 % Dividend yield 1.6 % 1.6 % 1.6 % Expected life (years) 5 5 5 Expected volatility 42.0 % 42.0 % 40.0 % Activity in the Company’s LTIP and Incentive Plan for the year ended December 31, 2020 was as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at January 1, 2020 31,750 $ 58.77 Granted 25,500 $ 48.13 Exercised (5,050 ) $ 47.68 Forfeited (1,250 ) $ 48.00 Outstanding (vested and expected to vest) at December 31, 2020 50,950 $ 54.81 7.5 $ 726 Exercisable at December 31, 2020 21,700 $ 61.77 5.0 $ 151 The weighted-average grant-date fair value of options granted during 2020 was $48.13 There were 5,050, 4,000, and 3,500 stock options exercised during the years ended December 31, 2020, 2019 and 2018, respectively. The total intrinsic value of stock options exercised was less than $.1 million for the year ended December 31, 2020 and $.1 For the year ended December 31, 2020, the Company recorded compensation expense related to the stock options currently vested of $.1 million and less than $.1 The excess tax benefits from share-based awards for each of the years ended December 31, 2020, 2019 and 2018 was less than $.1

Computation of Earnings Per Sha

Computation of Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Note I - 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 shares that were outstanding during the years presented. The calculation of basic and diluted earnings per share for the year ended December 31 was as follows: 2020 2019 2018 Numerator Net income $ 29,803 $ 23,303 $ 26,581 Denominator Determination of shares (in thousands) Weighted-average common shares outstanding 4,923 5,031 5,032 Dilutive effect - share-based awards 61 56 75 Diluted weighted-average common shares outstanding 4,984 5,087 5,107 Earnings per common share Basic $ 6.05 $ 4.63 $ 5.28 Diluted $ 5.98 $ 4.58 $ 5.21 For the year ended December 31, 2020, 2019 and 2018, 37,919, 15,041 and 260 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	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	Note J - Goodwill and Other Intangibles The Company’s finite and indefinite-lived intangible assets consist of the following: December 31, 2020 December 31, 2019 Gross Accumulated Gross Carrying Accumulated Amount Amortization Amount Amortization Finite-lived intangible assets Patents $ 4,806 $ (4,806 ) $ 4,806 $ (4,806 ) Land use rights 1,286 (396 ) 1,128 (331 ) Trademark 1,756 (1,474 ) 1,718 (1,358 ) Technology 7,673 (2,402 ) 7,185 (1,708 ) Customer relationships 16,441 (8,441 ) 15,811 (7,329 ) $ 31,962 $ (17,519 ) $ 30,648 $ (15,532 ) Indefinite-lived intangible assets Goodwill $ 29,508 $ 27,840 The Company performs its annual impairment test for goodwill utilizing a combination of the income approach, which uses a discounted cash flow methodology, and the market approach, which uses comparable market multiples, 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 with its carrying value to assess if goodwill has been impaired. The fair value estimates are subjective and sensitive to significant assumptions, such as revenue growth rates, operating margins, the weighted-average cost of capital (WACC), and estimated market multiples, of which are affected by expectations of future market or economic conditions. The Company believes that the methodologies, significant assumptions, and weightings used are reasonable and result in appropriate fair values of the reporting units. The Company performed its annual impairment test for goodwill as of October 1, 2020 and October 1, 2019 and determined that no adjustment to the carrying value was required. USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2019 $ 3,078 $ 3,997 $ 1,355 $ 7,191 $ 15,621 Currency translation 0 161 (45 ) (29 ) 87 Goodwill acquired during the year 0 0 18,619 0 18,619 Purchase price allocation adjustments 0 0 (6,487 ) 0 (6,487 ) Balance at December 31, 2019 3,078 4,158 13,442 7,162 27,840 Currency translation 0 93 1,007 568 1,668 Balance at December 31, 2020 $ 3,078 $ 4,251 $ 14,449 $ 7,730 $ 29,508 The Company’s only intangible asset with an indefinite life is goodwill. The Company’s goodwill is not deductible for tax purposes. Of the $6.5 million in purchase price allocation adjustments at December 31, 2019, $6.3 million represented an allocation to definite lived intangible assets and $.2 million represented an inventory step-up allocation. Refer to Note O “Business Combinations” for additional details regarding the Company’s purchase price allocations during fiscal 2019. The aggregate amortization expense for other intangibles with finite lives, ranging from 4 to 82 years, for the year ended December 31, 2020 was $1.8 million and was $1.5 million for both years ended December 31, 2019 and 2018. Amortization expense is estimated to be $1.7 million for 2021, $1.6

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities	Note K - 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: • Quoted prices for similar assets in active markets; • Quoted prices for identical or similar assets or liabilities in inactive markets; • Inputs other than quoted prices that are observable for the asset or liability; and • 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, in the consolidated balance sheets as of December 31, 2020 and 2019: 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 Earn-out 0 0 0 0 Total Liabilities $ 7,199 $ 0 $ 7,199 $ 0 Description Balance as of December 31, 2019 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Liabilities: Supplemental profit sharing plan $ 6,059 $ 0 $ 6,059 $ 0 Earn-out 581 0 0 581 Total Liabilities $ 6,640 $ 0 $ 6,059 $ 581 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 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 twelve months ended December 31, 2020 and 2019, the Company recognized a net gain of $.4 million and loss of $.2 million, respectively, on foreign currency forward contracts. The gains and losses on foreign currency forward contracts are recorded in Other operating expense, net on the Company’s Statement of Consolidated Income. The Company has a non-qualified Supplemental Profit Sharing Plan for its executives. The liability for this unfunded Supplemental Profit Sharing Plan was $7.1 million at December 31, 2020 and $6.1 million at December 31, 2019. These amounts are recorded within Other noncurrent liabilities on the Company’s Consolidated Balance Sheets. The Supplemental Profit Sharing Plan allows participants the ability to hypothetically invest their proportionate award into various investment options, which primarily includes 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. The earn-out represents the estimated fair value of additional cash consideration payable in connection with a recent acquisition that is contingent upon the achievement of certain performance milestones using expected future cash flows over the earn-out period and applied a discount rate that appropriately captures the risk associated with the obligation. These are considered to be Level 3 inputs. The contingent liabilities of $0 and $.6 million are recorded in Other noncurrent liabilities on the Company’s Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. The carrying value of the Company’s current financial instruments, which include cash and cash equivalents, accounts receivable, accounts payable and short-term debt, approximates fair value because of the short-term maturity of these instruments. At December 31, 20 20 , the fair value of the Company’s long-term debt was estimated using discounted cash flows analysis, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements that are considered to be Level 2 inputs. Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt are as follows: December 31, 2020 December 31, 2019 Fair Carrying Value Fair Value Carrying Value Long-term debt and related current maturities $ 38,726 $ 38,549 $ 56,539 $ 57,076

Revenue

Revenue	12 Months Ended
	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Revenue	Note L - 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: Year Ended December 31, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 62 % 78 % 57 % 70 % 66 % Communications 32 % 17 % 36 % 4 % 24 % Special Industries 6 % 5 % 7 % 26 % 10 % Total 100 % 100 % 100 % 100 % 100 % Year Ended December 31, 2019 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 62 % 67 % 68 % 72 % 67 % Communications 30 % 27 % 24 % 6 % 22 % Special Industries 8 % 6 % 8 % 22 % 11 % Total 100 % 100 % 100 % 100 % 100 %

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	Note M - Segment Information The Company designs, manufactures and sells hardware employed in the construction and maintenance of telecommunication, energy and other utility networks, data communication products and mounting hardware for solar power applications. Principal products include cable anchoring, control hardware and splice enclosures, which are sold primarily to customers in North and South America, Europe, South Africa and Asia-Pacific. The Company reports its segments in four geographic regions: PLP-USA, The Americas, EMEA (Europe, Middle East & Africa) and Asia-Pacific in accordance with accounting standards codified in Financial Accounting Standards Board “FASB” Accounting Standards Codification “ASC” 280, “Segment Reporting”. Each segment distributes a full range of the Company’s primary products. The PLP-USA segment is comprised of U.S. operations manufacturing the Company’s traditional products primarily supporting domestic energy, telecommunications and solar products. The other three segments, The Americas, EMEA and Asia-Pacific support the Company’s energy, telecommunications, data communication and solar products in each respective geographical region. The segment managers responsible for each region report directly to the Company’s Chief Executive Officer, who is the chief operating decision maker and are accountable for the financial results and performance of their entire segment for which they are responsible. The business components within each segment are managed to maximize the results of the entire company rather than the results of any individual business component of the segment. The amount of each segment’s performance reported to the chief operating decision maker is for purposes of making decisions about allocating resources to the segment and assessing its performance. The Company evaluates segment performance and allocates resources based on several factors primarily based on sales and income from continuing operations, net of tax. The accounting policies of the operating segments are the same as those described in Note A in the Notes to Consolidated Financial Statements. No single customer accounts for more than ten percent of the Company’s consolidated revenue. U.S. net sales for the year ended December 31, 2020, 2019, and 2018 were $201.3 million, $178.3 million and $169.0 million, respectively. U.S. long-lived assets as of December 31, 2020 and 2019 were $44.2 million and $51.1 million, respectively. The following table presents a summary of the Company’s reportable segments for the year ended December 31, 2020, 2019 and 2018. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profits in inventory. Year Ended December 31 2020 2019 2018 Net sales PLP-USA $ 201,277 $ 178,301 $ 169,040 The Americas 74,192 68,293 66,868 EMEA 91,108 79,158 69,773 Asia-Pacific 99,872 119,109 115,197 Total net sales $ 466,449 $ 444,861 $ 420,878 Intersegment sales PLP-USA $ 9,702 $ 10,757 $ 11,648 The Americas 9,938 7,774 9,480 EMEA 3,682 1,375 1,664 Asia-Pacific 14,452 12,720 11,907 Total intersegment sales $ 37,774 $ 32,626 $ 34,699 Interest income PLP-USA $ 0 $ 0 $ 0 The Americas 112 412 273 EMEA 67 192 102 Asia-Pacific 80 179 111 Total interest income $ 259 $ 783 $ 486 Interest expense PLP-USA $ (741 ) $ (972 ) $ (1,023 ) The Americas (586 ) (466 ) (111 ) EMEA (233 ) (149 ) (58 ) Asia-Pacific (836 ) (630 ) (98 ) Total interest expense $ (2,396 ) $ (2,217 ) $ (1,290 ) Income taxes PLP-USA $ 6,161 $ 3,299 $ 367 The Americas 2,461 2,551 3,349 EMEA 1,768 616 1,204 Asia-Pacific 420 1,656 1,087 Total income taxes $ 10,810 $ 8,122 $ 6,007 Net income attributable to Preformed Line Products Company shareholders PLP-USA $ 16,564 $ 8,054 $ 9,900 The Americas 5,068 6,657 8,479 EMEA 6,644 2,935 3,527 Asia-Pacific 1,527 5,657 4,675 Total net income $ 29,803 $ 23,303 $ 26,581 Year Ended December 31 2020 2019 2018 Expenditure for long-lived assets PLP-USA $ 9,536 $ 4,928 $ 3,672 The Americas 3,527 2,864 1,746 EMEA 3,007 5,304 1,591 Asia-Pacific 8,499 16,371 2,519 Total expenditures for long-lived assets $ 24,569 $ 29,467 $ 9,528 Depreciation and amortization PLP-USA $ 5,321 $ 5,393 $ 5,452 The Americas 1,710 1,862 1,488 EMEA 2,797 2,528 1,808 Asia-Pacific 4,010 3,965 3,696 Total depreciation and amortization $ 13,838 $ 13,748 $ 12,444 As of December 31 2020 2019 Identifiable assets PLP-USA $ 137,689 $ 127,428 The Americas 75,438 71,908 EMEA 106,922 97,126 Asia-Pacific 141,038 137,109 Total identifiable assets $ 461,087 $ 433,571 Property, plant and equipment PLP-USA $ 44,184 $ 51,097 The Americas 16,507 15,874 EMEA 18,362 16,419 Asia-Pacific 46,912 40,628 Total property, plant and equipment $ 125,965 $ 124,018

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Note N - Related Party Transactions On January 2, 2020, the Company purchased 1,157 shares of the Company from a retired Officer at a price per share of $67.71, 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 5, 2020, the Company purchased 39,208 shares of the Company from current and retired Officers at a price per share of $58.65, 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 October 28, 2020, the Board of the Directors of the Company approved the appointment of David C. Sunkle to serve on its Board of Directors effective upon his retirement at December 31, 2020 for a term commencing January 1, 2021 and ending when his successor has been duly elected and qualified at the annual meeting of shareholders in 2022 or until his earlier resignation or removal. On December 15, 2020, the Company purchased 19,900 shares of the Company from current Officers at a price per share of $62.71, 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 6, 2019, the Company purchased 36,413 shares of the Company from current and retired Officers at a price per share of $56.44, 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 July 2, 2019, the Company purchased 952 shares of the Company from a retired Officer at a price per share of $51.20, 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 December 1 2, 2019, the Company purchased 20,862 shares of the Company from current Officers at a price per share of $ 70.39 , 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 December 19, 2019, the Company purchased 6,326 shares of the Company from a retired Officer at a price per share of $71.75, 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 6, 2018, the Company purchased 7,877 shares of the Company from current Officers and a retired Officer at a price per share of $80.20, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On March 15, 2018, the Company purchased 1,430 shares of the Company from a current Officer at a price per share of $63.63, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On May 10, 2018, the Company purchased 3,200 shares of the Company from a current Officer at a price per share of $68.10, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On June 1, 2018, the Company purchased 8,800 shares of the Company from a retired Officer at a price per share of $73.53, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On June 15, 2018, the Company purchased 1,500 shares of the Company from current Officers at a price per share of $77.06, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On August 7, 2018, the Company purchased 17,141 shares of the Company from current Officers and a retired officer at a price per share of $87.19, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On August 23, 2018, the Company purchased 2,000 shares of the Company from a current employee at a price per share of $83.53, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On September 14, 2018, the Company purchased 7,500 shares of the Company from a current Officer at a price per share of $80.95, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. On December 18, 2018, the Company purchased 35 shares of the Company from a retired Officer at a price per share of $57.85, which was calculated from a 30-day average of market price in connection with the vesting of equity awards. The Audit Committee of the Board of Directors approved this transaction. The Company’s Australian subsidiary previously utilized copper extrusion services from Cast Alloy. As of December 31, 2020, the Company’s Australian subsidiary no longer utilizes the copper extrusion services from Cast Alloy, therefore, there was no expense in the current year. During the years ended December 31, 2019 and 2018, PLP-Australia incurred a total of $.1 million and $.2 million for these expenses. Cast Alloy is owned by Simi Almasan, Continuous Improvement Engineer, a current PLP employee. The Audit Committee of the Board of Directors approved these transactions. The Company’s Austrian subsidiary currently has a loan due, carrying an interest rate of 3.0%, to one if its current employees which is reflected on the Company’s balance sheet in the amount of $.1 million. Interest incurred on this loan during the year ended December 31, 20 was negligible. This loan is due in December of 2025. The Company’s Austrian subsidiary leases a portion of its Dornbirn, Austria location from a holding company owned by a current employee. During the years ended December 31, 2020 and 2019, the Company paid $.2 million and $.1 million in lease expenses, respectively. The lease is valid for an indefinite period of time and can be terminated if the lessee and lessor provide a six-month notice at the end of any chosen calendar year. The Company’s Czech Republic subsidiary leases a factory at its Prostějov, Czech Republic location from a company currently owned by two current employees. During both years ended December 31, 2020 and 2019, the Company paid $.2 million in lease expenses. The lease term is for 5 years During each year ended December 31, 2020, 2019 and 2018, the Company paid approximately $.1

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Business Combinations	Note O - Business Combinations The Company accounts for business combinations using the acquisition method of accounting and, accordingly, the assets and liabilities of the acquired entities are recorded at their estimated fair values at the date of acquisition. On February 28, 2019, the Company acquired 100% of SubCon. Subcon is headquartered in Dornbirn, Austria with manufacturing operations in Brno, Czech Republic. The acquisition of SubCon will strengthen the Company’s position in the global substation market and will expand its operational presence in Europe. The total purchase price was $10.1 million in cash, net of $1.9 million in cash acquired. The purchase price was predominantly allocated to Goodwill of $6.6 million and Intangible assets of $4.7 million with useful lives ranging from 10 to 11 years. SubCon’s overall purchase price included an estimated contingent liability of $.6 million for an earn-out consideration with a potential maximum payment of 4.0 million Euros which was reduced to zero during 2020. The earn-out of $0.0 and $.6 million is recorded in Other noncurrent liabilities on the Company’s Consolidated Balance Sheets at December 31, 2020 and 2019, respectively. On April 1, 2019, the Company acquired 90% of MICOS Telcom s.r.o. (“MICOS Telcom”) headquartered in Prostějov, Czech Republic with the remaining 10% to be acquired over the next three years. The acquisition of MICOS Telcom will strengthen the Company’s position in the global telecom market and will also expand its operational presence in Europe. The total purchase price was $8.8 million in cash, net of $.5 million in cash acquired and a hold-back liability of $1.5 million U.S. dollars payable in two years from the date of purchase and $.9 million of deferred consideration for the remaining 10%. The hold-back liability and deferred consideration are recorded in Other noncurrent liabilities on the Company’s Consolidated Balance Sheets. The purchase price was predominantly allocated to Goodwill of $5.6 million and Intangible assets of $3.4 million. The Intangible assets included in the acquisition of MICOS have useful lives of 12 years. The operating results and financial position of both SubCon and MICOS Telcom are included in the Company’s EMEA reportable segment as of their respective dates of acquisition. Pro-forma results of the Company’s consolidated operations for the years ended December 31, 2019 and 2018 would not have been materially different from reported results and are therefore not presented. There was no material impact on the Company’s Consolidated Statements of Income as a result of the finalization of purchase price accounting. The following table summarizes the final fair values of the assets acquired and liabilities assumed at the acquisition dates: Assets acquired Current assets, net of cash $ 5,976 Property, plant and equipment 1,189 Goodwill 12,132 Finite-lived intangible assets 8,092 Other long-term assets 1,883 Total assets acquired $ 29,272 Liabilities assumed (10,378 ) Net assets acquired $ 18,894

Product Warranty Reserve

Product Warranty Reserve	12 Months Ended
	Dec. 31, 2020
Guarantees [Abstract]
Product Warranty Reserve	Note P - 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 in the 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: 2020 2019 2018 Balance at January 1 $ 1,309 $ 928 $ 1,076 Additions charged to costs and expenses 279 481 97 Warranty usage (314 ) (317 ) (133 ) Currency translation 8 217 (112 ) Balance at December 31 $ 1,282 $ 1,309 $ 928

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Note Q - Subsequent Events On January 19, 2021, the Company received funding for a term loan from PNC Equipment Finance, LLC in the amount of $20.5 million to fund the purchase of a corporate aircraft. The principal of $20.5 million includes an amount that transacted as a deposit in September of 2020 and then, subsequently, refunded in January of 2021. The aircraft replaces the Company’s former aircraft, which was sold in December 2020. The proceeds of the sale were used to pay off the debt associated with the former aircraft. The term of the loan is 120 months at a fixed interest rate of 2.744%. The loan is payable in 119 equal monthly installments, commencing on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date. The loan is secured by the aircraft.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2020
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	PREFORMED LINE PRODUCTS COMPANY SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS Year Ended December 31, 2020, 2019 and 2018 (Thousands of dollars) For the year ended December 31, 2020: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions Balance at end of period Allowance for doubtful accounts $ 3,224 $ 1,279 $ (1,527 ) $ (128 ) $ 2,848 Reserve for credit memos 625 774 (792 ) 9 616 Slow-moving and obsolete inventory reserves 8,877 2,035 (1,097 ) 85 9,900 Accrued product warranty 1,309 279 (314 ) 8 1,282 Foreign net operating loss tax carryforwards 3,137 1,176 (1,473 ) 72 2,912 For the year ended December 31, 2019: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions Balance at end of period Allowance for doubtful accounts $ 2,652 $ 1,294 $ (697 ) $ (25 ) $ 3,224 Reserve for credit memos 526 817 (739 ) 21 625 Slow-moving and obsolete inventory reserves 8,462 1,283 (1,104 ) 236 8,877 Accrued product warranty 928 481 (317 ) 217 1,309 Foreign net operating loss tax carryforwards 3,495 153 (499 ) (12 ) 3,137 For the year ended December 31, 2018: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions Balance at end of period Allowance for doubtful accounts $ 2,910 $ 449 $ (529 ) $ (178 ) $ 2,652 Reserve for credit memos 415 802 (688 ) (3 ) 526 Slow-moving and obsolete inventory reserves 9,066 1,341 (1,658 ) (287 ) 8,462 Accrued product warranty 1,076 97 (133 ) (112 ) 928 Foreign net operating loss tax carryforwards 3,965 568 (761 ) (277 ) 3,495

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Preformed Line Products Company and subsidiaries (the “Company”) is a designer and manufacturer of products and systems employed in the construction and maintenance of overhead and underground networks for the energy, telecommunication, cable operators, data communication and other similar industries. The Company’s primary products support, protect, connect, terminate and secure cables and wires. The Company also provides solar hardware systems and mounting hardware for a variety of solar power applications. The Company’s customers include public and private energy utilities and communication companies, cable operators, governmental agencies, contractors and subcontractors, distributors and value-added resellers. The Company serves its worldwide markets through strategically located domestic and international manufacturing facilities.
Principles of Consolidation and Noncontrolling Interests	Principles of Consolidation and Noncontrolling Interests The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries for which it has a controlling interest. All intercompany accounts and transactions have been eliminated upon consolidation. 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 our Consolidated Financial Statements. Additionally, the Company’s Consolidated Financial Statements include 100% of a controlled subsidiary’s earnings, rather than only our 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.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash, cash equivalents and restricted cash (“Cash”) are stated at fair value and consist of highly liquid investments with original maturities of three months or less at the time of acquisition. Restricted cash is included on the Cash and cash equivalents on the Company’s Consolidated Balance Sheets.
Allowances for Doubtful Accounts	Allowances for Doubtful Accounts The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Prior to the adoption of Financial Accounting Standards Board (“FASB”) ASU 2016-13 “Financial Instruments – Credit Losses (Topic 326), the allowances for uncollectible accounts receivable were based upon the number of days the accounts are past due, the current business and macroeconomic environment, geographic considerations and specific information such as bankruptcy or liquidity issues of its customers. Rather than recognizing losses when they are deemed to be probable, the Company now uses a current expected credit loss model in order to immediately recognize an estimate of credit losses that are expected to occur over the life of the financial instruments, mainly trade receivables. Additionally, the allowance is based upon identified delinquent accounts, customer payment patterns and other analyses of historical data trends. The Company also maintains an allowance for future sales credits related to sales recorded during the year. The estimated allowance is based on historical sales credits issued in the subsequent year related to the prior year and any significant, preapproved open return good authorizations as of the balance sheet date.
Inventories	Inventories The Company uses the last-in, first-out (“LIFO”) method of determining cost for the majority of its material portion of inventories in PLP-USA. All other inventories are determined by the first-in, first-out (“FIFO”) or average cost methods. Inventories are carried at net realizable value. Reserves are maintained for estimated obsolescence or excess inventory based on past usage and future demand.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) 825, “Disclosures about Fair Value of Financial Instruments,” requires disclosures of the fair value of financial instruments. The estimated fair value of financial instruments was principally based on market prices where such prices were available, and when unavailable, fair values were estimated based on market prices of similar instruments.
Property, Plant and Equipment and Depreciation	Property, Plant and Equipment and Depreciation Property, plant, and equipment is recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives. The estimated useful lives used, when purchased new, are: land improvements, ten years; buildings, forty years; building improvements, five to forty years; machinery and equipment, three to ten years; and aircraft, fifteen years. Appropriate reductions in estimated useful lives are made for property, plant and equipment purchased in connection with an acquisition of a business or in a used condition when purchased.
Long-Lived Assets	Long-Lived Assets The Company records impairment losses on long-lived assets used in operations when events and circumstances indicate that the carrying value of the assets are impaired and the undiscounted future cash flows estimated to be generated by such assets are less than the carrying value. The Company’s cash flows are based on historical results adjusted to reflect the Company’s best estimate of future market and operating conditions. The net carrying value of assets not recoverable is then reduced to fair value. The estimate of fair value represents the Company’s best estimate based on industry trends and reference to market rates and transactions. The Company did not record any impairment to long-lived assets during the years ended December 31, 2020 and 2019.
Goodwill and Other Intangibles	Goodwill and Other Intangibles Goodwill and other intangible assets generally result from business acquisitions. Goodwill is not subject to amortization but is subject to annual impairment testing. Intangible assets with definite lives, consisting primarily of purchased customer relationships, patents, technology, customer backlogs, trademarks and land use rights, are generally amortized over periods from less than one year to twenty years. The Company’s intangible assets with finite lives are generally amortized over the period in which the economic benefits of the intangibles are consumed, using either a projected cash flow basis method or the straight-line method. The straight-line method is used in circumstances in which it better reflects the pattern in which the economic benefits of the intangible asset are consumed or otherwise expire compared to using a projected cash flow basis method. An evaluation of the remaining useful life of intangible assets with a determinable life is performed on a periodic basis and when events and circumstances warrant an evaluation. The Company assesses intangible assets with a determinable life for impairment consistent with its policy for assessing other long-lived assets. Goodwill and intangible assets are also reviewed for impairment annually or more frequently when changes in circumstances indicate the carrying amount may be impaired, or in the case of finite-lived intangible assets, when the carrying amount may not be recoverable. Events or circumstances that would result in an impairment review primarily include operations reporting losses or a significant change in the use of an asset. Impairment charges are recognized pursuant to FASB ASC 350-20, “Goodwill.” The Company performs its annual impairment test for goodwill utilizing a combination of the income approach, which uses a discounted cash flow methodology, and the market approach, which uses comparable market multiples, 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 with its carrying value to assess if goodwill has been impaired. The fair value estimates are subjective and sensitive to significant assumptions, such as revenue growth rates, operating margins, the weighted-average cost of capital (WACC), and estimated market multiples, of which are affected by expectations of future market or economic conditions. The Company believes that the methodologies, significant assumptions, and weightings used are reasonable and result in appropriate fair values of the reporting units. The Company performed its annual impairment test for goodwill as of October 1, 2020 and 2019 and determined that no adjustment to the carrying value was required for the years ended December 31, 2020 and 2019.
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.
Research and Development	Research and Development Research and development costs for new products are expensed as incurred and totaled $2.8 million in 2020, $3.0 million in 2019 and $2.4 million in 2018.
Income Taxes	Income Taxes Income taxes are computed in accordance with the provisions of FASB ASC 740, “Income taxes” and includes U.S. (federal and state) and foreign income taxes. In the Consolidated Financial Statements, the benefits of a consolidated return have been reflected where such returns have or could be filed based on the entities and jurisdictions included in the financial statements. Provisions of the U.S. Tax Cuts and Jobs Act ("U.S. Tax Act") became effective for the Company in 2018. The Foreign-Derived Intangible Income (“FDII”) provision generates a deduction against the Company’s U.S. taxable income for U.S. earnings derived offshore that utilize intangibles held by the Company in the U.S. Conversely, the Global Intangible Low-Taxed Income (“GILTI”) provision requires the Company to subject to U.S. taxation a portion of its foreign subsidiary earnings that exceed an allowable return. The Company elects to treat any Global Intangible Low-Taxed Income (“GILTI”) inclusion as a period expense in the year incurred.
Deferred Tax Assets	Deferred Tax Assets Deferred taxes are recognized at currently enacted tax rates for temporary differences between the financial reporting and income tax basis of assets and liabilities and operating loss and tax credit carryforwards. The Company establishes a valuation allowance to record deferred tax assets at an amount that is more-likely-than-not to be realized. In the event the Company were to determine that it would be able to realize our deferred tax assets in the future in excess of the recorded amount, an adjustment to the valuation allowance would increase income in the period such determination was made. Likewise, should the Company determine that it would not be able to realize all or part of the net deferred tax assets in the future, an adjustment to the valuation allowance would be charged to expense in the period such determination was made.
Uncertain Tax Positions	Uncertain Tax Positions The Company identifies tax positions taken on the federal, state, local and foreign income tax returns filed or to be filed. A tax position can include: a reduction in taxable income reported in a previously filed tax return or expected to be reported on a future tax return that impacts the measurement of current or deferred income tax assets or liabilities in the period being reported; a decision not to file a tax return; an allocation or a shift of income between jurisdictions; the characterization of income or a decision to exclude reporting taxable income in a tax return; or a decision to classify a transaction, entity or other position in a tax return as tax exempt. The Company determines whether a tax position is an uncertain or a routine business transaction tax position that is more-likely-than-not to be sustained at the full amount upon examination. Under FASB ASC 740, “Tax Benefits from Uncertain Tax Positions” that reduce our current or future income tax liability are reported in our financial statements only to the extent that each benefit is recognized and measured under a two-step approach. The first step requires us to assess whether each tax position based on its technical merits and facts and circumstances as of the reporting date, is more-likely-than-not to be sustained upon examination. The second step measures the amount of tax benefit that we would recognize in the financial statements based on a cumulative probability approach. A tax position that meets the more-likely-than-not threshold that is not highly certain is measured based on the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority, assuming that the tax authority has examined the position and has full knowledge of all relevant information. ASC 740 requires subjectivity to identify outcomes and to assign probability in order to estimate the settlement amount. The Company provides estimates in order to determine settlement amounts. During the year ended December 31, 2020, the Company recorded $.1 million of reserves for uncertain tax positions.
Advertising	Advertising Advertising costs are expensed as incurred and totaled $.3 million in 2020 and $1.9 million in both 2019 and 2018.
Foreign Currency Translation	Foreign Currency Translation Asset and liability accounts are translated into U.S. dollars using exchange rates in effect at the date of the Consolidated Balance Sheet. The translation adjustments are recorded in Accumulated other comprehensive income (loss). Revenues and expenses are translated at weighted average exchange rates in effect during the period. Transaction gains and losses arising from exchange rate changes on transactions denominated in a currency other than the functional currency are included in income and expense as incurred. Aggregate transaction losses, including hedge activity, for the years ended December 31, 2020, 2019 and 2018 were $1.0 million, Effective July 1, 2018, Argentina was designated as a highly inflationary economy as the projected three-year 2%
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates.
Business Combinations	Business Combinations Upon acquisition of a business, the Company uses the income, market or cost approach (or a combination thereof) for the valuation as appropriate. The valuation inputs in these models and analyses are based on market participant assumptions. Market participants are considered to be buyers and sellers unrelated to the Company in the principal or most advantageous market for the asset or liability. In the event there is an earn-out associated with an acquisition, the Company uses a valuation model to measure the contingent consideration, which may include significant assumptions such as revenue projections and discount rates. The Company uses a discounted cash flow model to measure the useful lives of intangible assets. The significant assumptions used to estimate the fair value of the intangible assets include discount rates and certain assumptions that form the basis of future cash flows (such as revenue growth rates, attrition rates, and royalty rates). These assumptions relate to the future performance of the acquired businesses, are forward-looking and could be affected by future economic and market conditions. Fair value estimates are based on a series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. Management values property, plant and equipment using the cost approach supported where available by observable market data, which includes consideration of obsolescence. Acquired inventories are marked to fair value. For certain items, the carrying value is determined to be a reasonable approximation of fair value based on information available to the Company
Derivative Financial Instruments	Derivative Financial Instruments 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 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. The Company records the contracts at fair value in the Consolidated Balance Sheets. The Company does not hold derivatives for trading purposes.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes” (ASU 2019-12”) which simplifies certain specific aspects of ASC 740. ASU 2019-12 addresses the income tax accounting implications of hybrid tax regimes, which includes tax regimes that impose the greater of two taxes, one based on income or one based on items other than income, the treatment of tax basis step-up of goodwill in a transaction that does not qualify as a business combination, the application of the intra-period tax allocation rules in certain situations involving a valuation allowance, the income tax accounting impact on the change of the ownership of an investment from a subsidiary to an equity method investment and a change in an investment from an equity method investment to a subsidiary, income tax accounting related to interim reporting, including the treatment of enacted changes in tax law during interim periods and the treatment of year-to-date loss limitations. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim periods therein. Early adoption of the standard is permitted, including adoption in interim or annual periods for which financial statements have not been issued. The Company has not adopted ASU 2019-12, as ASU 2019-12 would not have a material effect on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which will modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, including the removal of certain disclosure requirements. The amendments in ASU 2018-13 are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company adopted the new disclosure requirements beginning in the period ending March 31, 2020. The additional components of this release did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans (“Topic 715”). ASU 2018-14 modifies disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Among other requirements, the ASU requires an entity to disclose the reasons for significant gains and losses related to changes in the benefit obligation. Refer to Note C to the Consolidated Financial Statements for further details. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (“Topic 326”): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes how entities will measure credit losses for most financial assets and other instruments that are not measured at fair value through net income. This update introduces the current expected credit loss (CECL) model, which will require an entity to measure credit losses for certain financial instruments and financial assets, including trade receivables. Under this update, on initial recognition and at each reporting period, an entity will be required to recognize an allowance that reflects the entity’s current estimate of credit losses expected to be incurred over the life of the financial instrument. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company has completed its evaluation process and the January 1, 2020 adoption did not have a material impact to the Company’s consolidated financial statements for the twelve months ended December 31, 2020 .
New Accounting Standards to be Adopted	New Accounting Standards To Be Adopted In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (“Topic 848”): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides for temporary optional expedients and exceptions to the current guidance on certain contract modifications and hedging relationships to ease the burdens related to the expected market transition from the London Inter-bank Offered Rate (“LIBOR”) or other reference rates to alternative reference rates. The guidance is available 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 at the completion of that analysis.

Other Financial Statement Inf_2

Other Financial Statement Information (Tables)	12 Months Ended
	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Inventories - Net	Inventories – net December 31 2020 2019 Raw materials $ 53,947 $ 49,729 Work-in-process 9,272 9,352 Finished products 38,801 45,760 102,020 104,841 Excess of current cost over LIFO cost (4,483 ) (4,667 ) Noncurrent portion of inventory 0 (4,456 ) $ 97,537 $ 95,718
Property, Plant and Equipment - Net	Major classes of property, plant and equipment are as follows: December 31 2020 2019 Land and improvements $ 22,132 $ 22,218 Buildings and improvements 97,909 82,811 Machinery, equipment and aircraft 176,377 180,221 Construction in progress 9,563 9,460 305,981 294,710 Less accumulated depreciation (180,016 ) (170,692 ) $ 125,965 $ 124,018

Pension Plans (Tables)

Pension Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Pension Cost	Net periodic pension cost for the Plan consists of the following components for the year ended December 31: 2020 2019 2018 Service cost $ 0 $ 299 $ 250 Interest cost 1,301 1,411 1,349 Expected return on plan assets (2,251 ) (1,946 ) (1,985 ) Recognized net actuarial loss 475 520 525 Net periodic pension cost $ (475 ) $ 284 $ 139
Projected Benefit Obligation and Fair Value of Plan Assets	The following tables set forth benefit obligations, plan assets and the accrued benefit cost of the Plan at December 31: 2020 2019 Projected benefit obligation at beginning of the year $ 37,936 $ 33,931 Service cost 0 299 Interest cost 1,301 1,411 Actuarial loss (gain) 4,590 3,528 Benefits paid (1,245 ) (1,233 ) Projected benefit obligation at end of year $ 42,582 $ 37,936 Fair value of plan assets at beginning of the year $ 32,658 $ 28,672 Actual return on plan assets 5,013 5,219 Employer contributions 330 0 Benefits paid (1,245 ) (1,233 ) Fair value of plan assets at end of the year $ 36,756 $ 32,658 Unfunded pension obligation $ 5,826 $ 5,278
Amount Recognized in Accumulated Other Comprehensive Loss Related to Pension Plan	In accordance with ASC 715-20, the Company recognizes the underfunded status of the Plan as a liability. The amount recognized in Accumulated other comprehensive loss related to the Plan at December 31 is comprised of the following: 2020 2019 Balance at January 1 $ (5,671 ) $ (5,873 ) Reclassification adjustments: Pre-tax amortized net actuarial loss 475 520 Tax provision (112 ) (123 ) 363 397 Adjustment to recognize gain (loss) on unfunded pension obligations: Pre-tax loss (1,829 ) (255 ) Tax provision 433 60 (1,396 ) (195 ) Balance at December 31 $ (6,704 ) $ (5,671 )
Accumulated Benefit Obligations in Excess of Plan Assets	The Plan had accumulated benefit obligations in excess of Plan assets as follows: 2020 2019 Accumulated benefit obligation $ 42,582 $ 37,936 Fair market value of assets $ 36,756 $ 32,658
Weighted-Average Assumptions Used to Determine Benefit Obligations & Net Periodic Benefit Cost	Weighted-average assumptions used to determine benefit obligations at December 31 2020 2019 Discount rate 2.69% 3.50% Rate of compensation increase n/a n/a Weighted-average assumptions used to determine net periodic benefit cost at December 31 2020 2019 2018 Discount rate 3.50% 3.50% 4.25% Rate of compensation increase n/a n/a n/a Expected long-term return on plan assets 7.00 7.00 8.00
Fair Value of the Plan Assets	The fair value of the Plan assets as of December 31, 2020 and 2019, by category, are as follows: 2020 2019 Assets measured at net asset value Pooled investment fund $ 36,756 $ 32,658 Total $ 36,756 $ 32,658
Weighted-Average Asset Allocations of Plan Assets	The Plan weighted-average asset allocations at December 31, 2020 and 2019, by asset category, are as follows: Plan assets at December 31 2020 2019 Asset category Equity securities 47 % 48 % Debt securities 53 51 Cash and equivalents 0 1 100 % 100 %
Weighted-Average Target Allocations of Plan Assets	In recognition of the expected returns and volatility from financial assets, Plan assets are invested in the following ranges with the target allocation noted: Range Target Equities 40-60% 50% Fixed Income 40-60% 50% Cash Equivalents 0-10% 0.0%
Aggregate Benefits Expected to be Paid Out of Plan Assets	The benefits expected to be paid out of the Plan assets in each of the next five years and the aggregate benefits expected to be paid for the subsequent five years are as follows: Year Pension Benefits 2021 $ 1,273 2022 1,359 2023 1,449 2024 1,540 2025 1,616 2026-2030 9,344

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income ("AOCI") (Tables)	12 Months Ended
	Dec. 31, 2020
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: Year Ended December 31, 2020 Year Ended December 31, 2019 Cumulative Cumulative Unrecognized Translation Unrecognized Translation Benefit Cost Adjustment Total Benefit Cost Adjustment Total Balance at January 1 $ (5,671 ) $ (51,682 ) $ (57,353 ) $ (5,873 ) $ (53,710 ) $ (59,583 ) Other comprehensive income before reclassifications: Gain (loss) on foreign currency translation adjustment 0 3,835 3,835 0 2,028 2,028 Loss on unfunded pension obligations (1,396 ) 0 (1,396 ) (195 ) 0 (195 ) Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial loss (a) 363 0 363 397 0 397 Net current period other comprehensive income (loss) (1,033 ) 3,835 2,802 202 2,028 2,230 Balance at December 31 $ (6,704 ) $ (47,847 ) $ (54,551 ) $ (5,671 ) $ (51,682 ) $ (57,353 ) (a) This AOCI component is included in the computation of net periodic pension costs as noted in Note C – Pension Plans.

Debt and Credit Arrangements (T

Debt and Credit Arrangements (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt and Credit Arrangements	December 31 2020 2019 Short-term debt Secured notes Thailand Bhat denominated at 3.60% $ 5,291 $ 3,670 Thailand Bhat denominated at 3.29% 2,384 1,882 Thailand Bhat denominated at 2.97% 957 0 France Euro denominated at 2.50% 6,142 0 Brazil Real denominated at 2.83% 0 1,152 Brazil Real denominated at 5.40% 1,854 752 Brazil Real denominated at 9.40% 0 1,240 Brazil Real denominated at 3.30% 800 0 Current portion of long-term debt U.S. dollar denominated at 2.71% 0 1,448 Austria Euro denominated at 2.48% 25 30 Austria Euro denominated at 1.40% 0 560 Austria Euro denominated at 3.00% 22 22 Indonesia U.S. Dollar denominated at 3.50% 800 800 New Zealand U.S. Dollar denominated at 3.25% 4,369 494 Total short-term debt 22,644 12,050 Long-term debt U.S. Dollar denominated at 1.27%, due 2024 12,706 21,552 U.S. Dollar denominated at 2.71%, due 2026 0 9,535 Brazilian Real denominated at 4.60% due 2022 68 147 Brazilian Real denominated at 8.30% due 2025 1,800 0 Poland Zloty denominated at 1.33% due 2024 6,696 6,524 Australian Dollar denominated at 1.15%, due 2024 5,288 5,526 Austria Euro denominated at 2.48% due 2022 25 0 Austria Euro denominated at 2.32% due 2030 128 224 Austria Euro denominated at 2.76% due 2022 67 0 Austria Euro denominated at 1.27% due 2024 614 560 Austria Euro denominated at 3.00% due 2025 121 134 Indonesia U.S Dollar denominated at 3.50% due 2024 6,667 7,467 New Zealand Dollar denominated at 3.25% due 2021 4,369 0 New Zealand Dollar denominated at 3.90% due 2021 0 5,407 Total long-term debt 38,549 57,076 Less current portion (5,216 ) (3,354 ) Total long-term debt, less current portion 33,333 53,722 Total debt $ 55,977 $ 65,772

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Summary of Components of Lease Expense	The Company’s operating and finance lease costs for the year ended December 31, 2020 were as follows: Year Ended December 31 2020 2019 Components of lease expense Operating lease cost $ 2,957 $ 3,138 Finance lease cost Amortization of right-of-use assets 66 67 Interest on lease liabilities 9 11 Total lease cost $ 3,032 $ 3,216
Schedule of Future Maturities of Lease Liabilities	Future maturities of the Company’s lease liabilities as of December 31, 2020 are as follows: Year Ended December 31, 2020 Operating Leases Finance Leases 2021 $ 2,580 $ 83 2022 2,156 64 2023 1,482 60 2024 777 30 2025 and thereafter 9,928 19 Total lease payments $ 16,923 $ 256 Less amount of lease payment representing interest 5,940 19 Total present value of lease payments $ 10,983 $ 237
Summary of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases for the year ended December 31, 2020 was as follows: Year Ended December 31 2020 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2,793 $ 5,321 Operating cash flows from finance leases 9 11 Financing cash flows from finance leases 118 100

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Before Income Taxes	Income before income taxes was derived from the following sources: 2020 2019 2018 United States $ 22,725 $ 11,353 $ 10,268 Foreign 17,846 20,105 22,320 $ 40,571 $ 31,458 $ 32,588
Components of Income Taxes	The components of income taxes for the years ended December 31 are as follows: 2020 2019 2018 Current Federal $ 7,909 $ 2,835 $ (904 ) Foreign 5,093 6,170 6,247 State and local 1,188 391 350 14,190 9,396 5,693 Deferred Federal (2,290 ) (10 ) 801 Foreign (445 ) (1,347 ) (608 ) State and local (645 ) 83 121 (3,380 ) (1,274 ) 314 Income taxes $ 10,810 $ 8,122 $ 6,007
Differences Between the Provision for Income Taxes at the U.S. Federal Statutory Rate and the Tax	The differences between the provision for income taxes at the U.S. federal statutory rate and the tax shown in the Statements of Consolidated Income for the years ended December 31 are summarized as follows: 2020 2019 2018 U. S. federal statutory tax rate 21% 21% 21% Federal tax at statutory rate $ 8,520 $ 6,606 $ 6,843 State and local taxes, net of federal benefit 942 308 273 U.S. federal permanent items 1,323 621 240 Global intangible low-taxed income 1,222 1,738 1,721 Foreign tax credits (1,204 ) (1,422 ) (1,707 ) Transition tax 0 0 (1,780 ) Non-U.S. tax rate variances 1,330 929 1,011 Valuation allowance (245 ) (346 ) (57 ) Tax credits (349 ) (464 ) (295 ) Tax act impact, deferred rate 0 0 (680 ) Other, net (729 ) 152 438 $ 10,810 $ 8,122 $ 6,007
Tax Effects of Temporary Differences That Give Rise to the Company's Deferred Tax Assets and Liabilities	The tax effects of temporary differences that give rise to the Company’s deferred tax assets and liabilities at December 31 are as follows: 2020 2019 Deferred tax assets: Accrued compensation and benefits $ 1,518 $ 1,180 Inventory valuation reserves 2,535 2,384 Allowance for doubtful accounts 480 473 Benefit plan reserves 7,564 7,586 Net operating loss carryforwards 1,851 3,003 Other accrued expenses 3,825 3,012 Unrealized foreign exchange 799 718 Other 284 0 Gross deferred tax assets 18,856 18,356 Valuation allowance (2,912 ) (3,137 ) Net deferred tax assets 15,944 15,219 Deferred tax liabilities: Depreciation and other basis differences (4,514 ) (6,867 ) Intangibles (3,419 ) (3,742 ) Other (69 ) (162 ) Deferred tax liabilities (8,002 ) (10,771 ) Net deferred tax assets $ 7,942 $ 4,448 2020 2019 Change in net deferred tax assets: Deferred income tax expense Ordinary movement $ 3,380 $ 1,275 Deferred tax balances from business acquisition 0 (1,883 ) Items of other comprehensive income (loss) 319 (62 ) Currency translation (205 ) (71 ) Total change in net deferred tax assets $ 3,494 $ (741 )
Changes in Unrecognized Tax Benefits Excluding Interest and Penalties	The following is a tabular reconciliation of the total amounts of unrecognized tax benefits related to uncertain tax positions, excluding interest and penalties, for the year ended December 31: 2020 2019 2018 Balance at January 1 $ 118 $ 0 $ 0 Additions for tax positions of current year 0 0 0 Additions for tax positions of prior years 0 118 0 Reductions for tax positions of prior years 0 0 0 Expiration of statutes of limitations (52 ) 0 0 Balance at December 31 $ 66 $ 118 $ 0

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Summary of RSUs	A summary of the RSUs for the year ended December 31, 2020 is as follows: Restricted Share Awards Performance Total Weighted-Average and Service Service Restricted Grant-Date Required Required Awards Fair Value Nonvested as of January 1, 2020 196,342 15,292 211,634 $ 53.68 Granted 71,539 9,547 81,086 54.25 Vested (73,053 ) (6,290 ) (79,343 ) 56.13 Forfeited (11,051 ) (2,763 ) (13,814 ) 61.29 Nonvested as of December 31, 2020 183,777 15,786 199,563 $ 60.33
Weighted-Average Assumptions for Estimating Fair Values	The fair values for the stock options granted were estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions: 2020 2019 2018 Risk-free interest rate 1.8 % 1.8 % 2.8 % Dividend yield 1.6 % 1.6 % 1.6 % Expected life (years) 5 5 5 Expected volatility 42.0 % 42.0 % 40.0 %
Long Term Incentive Plan [Member]
Activity in Company's Plan	Activity in the Company’s LTIP and Incentive Plan for the year ended December 31, 2020 was as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at January 1, 2020 31,750 $ 58.77 Granted 25,500 $ 48.13 Exercised (5,050 ) $ 47.68 Forfeited (1,250 ) $ 48.00 Outstanding (vested and expected to vest) at December 31, 2020 50,950 $ 54.81 7.5 $ 726 Exercisable at December 31, 2020 21,700 $ 61.77 5.0 $ 151

Computation of Earnings Per S_2

Computation of Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	The calculation of basic and diluted earnings per share for the year ended December 31 was as follows: 2020 2019 2018 Numerator Net income $ 29,803 $ 23,303 $ 26,581 Denominator Determination of shares (in thousands) Weighted-average common shares outstanding 4,923 5,031 5,032 Dilutive effect - share-based awards 61 56 75 Diluted weighted-average common shares outstanding 4,984 5,087 5,107 Earnings per common share Basic $ 6.05 $ 4.63 $ 5.28 Diluted $ 5.98 $ 4.58 $ 5.21

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2020
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: December 31, 2020 December 31, 2019 Gross Accumulated Gross Carrying Accumulated Amount Amortization Amount Amortization Finite-lived intangible assets Patents $ 4,806 $ (4,806 ) $ 4,806 $ (4,806 ) Land use rights 1,286 (396 ) 1,128 (331 ) Trademark 1,756 (1,474 ) 1,718 (1,358 ) Technology 7,673 (2,402 ) 7,185 (1,708 ) Customer relationships 16,441 (8,441 ) 15,811 (7,329 ) $ 31,962 $ (17,519 ) $ 30,648 $ (15,532 ) Indefinite-lived intangible assets Goodwill $ 29,508 $ 27,840
Changes in Carrying Amount of Goodwill by Segment	USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2019 $ 3,078 $ 3,997 $ 1,355 $ 7,191 $ 15,621 Currency translation 0 161 (45 ) (29 ) 87 Goodwill acquired during the year 0 0 18,619 0 18,619 Purchase price allocation adjustments 0 0 (6,487 ) 0 (6,487 ) Balance at December 31, 2019 3,078 4,158 13,442 7,162 27,840 Currency translation 0 93 1,007 568 1,668 Balance at December 31, 2020 $ 3,078 $ 4,251 $ 14,449 $ 7,730 $ 29,508

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
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, in the consolidated balance sheets as of December 31, 2020 and 2019: 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 Earn-out 0 0 0 0 Total Liabilities $ 7,199 $ 0 $ 7,199 $ 0 Description Balance as of December 31, 2019 Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Liabilities: Supplemental profit sharing plan $ 6,059 $ 0 $ 6,059 $ 0 Earn-out 581 0 0 581 Total Liabilities $ 6,640 $ 0 $ 6,059 $ 581
Fair Value and Carrying Value of Long-Term Debt	Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt are as follows: December 31, 2020 December 31, 2019 Fair Carrying Value Fair Value Carrying Value Long-term debt and related current maturities $ 38,726 $ 38,549 $ 56,539 $ 57,076

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Revenues by Segment and Product Type	The Company’s revenues by segment and product type are as follows: Year Ended December 31, 2020 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 62 % 78 % 57 % 70 % 66 % Communications 32 % 17 % 36 % 4 % 24 % Special Industries 6 % 5 % 7 % 26 % 10 % Total 100 % 100 % 100 % 100 % 100 % Year Ended December 31, 2019 Product Type PLP-USA The Americas EMEA Asia-Pacific Consolidated Energy 62 % 67 % 68 % 72 % 67 % Communications 30 % 27 % 24 % 6 % 22 % Special Industries 8 % 6 % 8 % 22 % 11 % Total 100 % 100 % 100 % 100 % 100 %

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Summary of Company's Reportable Segments	The following table presents a summary of the Company’s reportable segments for the year ended December 31, 2020, 2019 and 2018. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profits in inventory. Year Ended December 31 2020 2019 2018 Net sales PLP-USA $ 201,277 $ 178,301 $ 169,040 The Americas 74,192 68,293 66,868 EMEA 91,108 79,158 69,773 Asia-Pacific 99,872 119,109 115,197 Total net sales $ 466,449 $ 444,861 $ 420,878 Intersegment sales PLP-USA $ 9,702 $ 10,757 $ 11,648 The Americas 9,938 7,774 9,480 EMEA 3,682 1,375 1,664 Asia-Pacific 14,452 12,720 11,907 Total intersegment sales $ 37,774 $ 32,626 $ 34,699 Interest income PLP-USA $ 0 $ 0 $ 0 The Americas 112 412 273 EMEA 67 192 102 Asia-Pacific 80 179 111 Total interest income $ 259 $ 783 $ 486 Interest expense PLP-USA $ (741 ) $ (972 ) $ (1,023 ) The Americas (586 ) (466 ) (111 ) EMEA (233 ) (149 ) (58 ) Asia-Pacific (836 ) (630 ) (98 ) Total interest expense $ (2,396 ) $ (2,217 ) $ (1,290 ) Income taxes PLP-USA $ 6,161 $ 3,299 $ 367 The Americas 2,461 2,551 3,349 EMEA 1,768 616 1,204 Asia-Pacific 420 1,656 1,087 Total income taxes $ 10,810 $ 8,122 $ 6,007 Net income attributable to Preformed Line Products Company shareholders PLP-USA $ 16,564 $ 8,054 $ 9,900 The Americas 5,068 6,657 8,479 EMEA 6,644 2,935 3,527 Asia-Pacific 1,527 5,657 4,675 Total net income $ 29,803 $ 23,303 $ 26,581 Year Ended December 31 2020 2019 2018 Expenditure for long-lived assets PLP-USA $ 9,536 $ 4,928 $ 3,672 The Americas 3,527 2,864 1,746 EMEA 3,007 5,304 1,591 Asia-Pacific 8,499 16,371 2,519 Total expenditures for long-lived assets $ 24,569 $ 29,467 $ 9,528 Depreciation and amortization PLP-USA $ 5,321 $ 5,393 $ 5,452 The Americas 1,710 1,862 1,488 EMEA 2,797 2,528 1,808 Asia-Pacific 4,010 3,965 3,696 Total depreciation and amortization $ 13,838 $ 13,748 $ 12,444 As of December 31 2020 2019 Identifiable assets PLP-USA $ 137,689 $ 127,428 The Americas 75,438 71,908 EMEA 106,922 97,126 Asia-Pacific 141,038 137,109 Total identifiable assets $ 461,087 $ 433,571 Property, plant and equipment PLP-USA $ 44,184 $ 51,097 The Americas 16,507 15,874 EMEA 18,362 16,419 Asia-Pacific 46,912 40,628 Total property, plant and equipment $ 125,965 $ 124,018

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Summary of Final Fair Values of Assets Acquired and Liabilities Assumed	There was no material impact on the Company’s Consolidated Statements of Income as a result of the finalization of purchase price accounting. The following table summarizes the final fair values of the assets acquired and liabilities assumed at the acquisition dates: Assets acquired Current assets, net of cash $ 5,976 Property, plant and equipment 1,189 Goodwill 12,132 Finite-lived intangible assets 8,092 Other long-term assets 1,883 Total assets acquired $ 29,272 Liabilities assumed (10,378 ) Net assets acquired $ 18,894

Product Warranty Reserve (Table

Product Warranty Reserve (Tables)	12 Months Ended
	Dec. 31, 2020
Guarantees [Abstract]
Roll Forward of Product Warranty Reserve	The following is a rollforward of the product warranty reserve: 2020 2019 2018 Balance at January 1 $ 1,309 $ 928 $ 1,076 Additions charged to costs and expenses 279 481 97 Warranty usage (314 ) (317 ) (133 ) Currency translation 8 217 (112 ) Balance at December 31 $ 1,282 $ 1,309 $ 928

Significant Accounting Polici_3

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Percentage of ownership in earnings of subsidiary		100.00%
Research and development costs		$ 2,800	$ 3,000	$ 2,400
Uncertain tax positions, settlement amount		66	118	0	$ 0
Advertising cost		300	1,900	1,900
Aggregate foreign currency transaction losses includes hedge activity		$ 1,000	$ 200	$ 1,500
Foreign currency forward contracts maturity period		90 days
ASU 2018-13 [Member]
Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, adoption date		Mar. 31, 2020
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
ASU 2018-13 [Member]
Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jan. 1, 2020
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
Argentina [Member]
Significant Accounting Policies [Line Items]
Cumulative inflation rate period	3 years
Minimum [Member]
Significant Accounting Policies [Line Items]
Amortization period of intangible assets		1 year
Minimum [Member] | Argentina [Member]
Significant Accounting Policies [Line Items]
Cumulative inflation rate	100.00%
Maximum [Member]
Significant Accounting Policies [Line Items]
Amortization period of intangible assets		20 years
Maximum [Member] | Argentina [Member]
Significant Accounting Policies [Line Items]
Percentage of consolidated net sales from revenue operations		1.00%	2.00%	2.00%
Land and Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		10 years
Building [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		40 years
Building Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		5 years
Building Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		40 years
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		3 years
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		10 years
Aircraft [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of Property, Plant and Equipment		15 years

Other Financial Statement Inf_3

Other Financial Statement Information - Inventories - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 53,947	$ 49,729
Work-in-process	9,272	9,352
Finished products	38,801	45,760
Inventory, gross	102,020	104,841
Excess of current cost over LIFO cost	(4,483)	(4,667)
Noncurrent portion of inventory	0	(4,456)
Inventories - net	$ 97,537	$ 95,718

Other Financial Statement Inf_4

Other Financial Statement Information - Additional Information (Detail) - USD ($) $ in Millions	Nov. 02, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Cost of inventories for certain materials using LIFO method		$ 32	$ 32
Inventory reserves for slow-moving and obsolete inventory		9.9	8.9
Depreciation of property and equipment		12.2	12.3	$ 12.1
Financing leases of machinery, equipment and aircraft		0.3	$ 0.3
Accrued estimate for losses		$ 2.2
Name of plaintiff		Altalink, L.P.
Complaint filling date		November 2016
Estimated damages from defendants	$ 56

Other Financial Statement Inf_5

Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	$ 305,981	$ 294,710
Less accumulated depreciation	(180,016)	(170,692)
Property, plant and equipment - Net	125,965	124,018
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	22,132	22,218
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	97,909	82,811
Machinery, Equipment and Aircraft [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	176,377	180,221
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - Gross	$ 9,563	$ 9,460

Pension Plans - Components of N

Pension Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 0	$ 299	$ 250
Interest cost	1,301	1,411	1,349
Expected return on plan assets	(2,251)	(1,946)	(1,985)
Recognized net actuarial loss	475	520	525
Net periodic pension cost	$ (475)	$ 284	$ 139

Pension Plans - Projected Benef

Pension Plans - Projected Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Funded Status Of Plan [Abstract]
Projected benefit obligation at beginning of the year	$ 37,936	$ 33,931
Service cost	0	299	$ 250
Interest cost	1,301	1,411	1,349
Actuarial loss (gain)	4,590	3,528
Benefits paid	(1,245)	(1,233)
Projected benefit obligation at end of year	42,582	37,936	33,931
Fair value of plan assets at beginning of the year	32,658	28,672
Actual return on plan assets	5,013	5,219
Employer contributions	330	0
Benefits paid	(1,245)	(1,233)
Fair value of plan assets at end of the year	36,756	32,658	$ 28,672
Unfunded pension obligation	$ 5,826	$ 5,278

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension And Other Employee Benefit Plans [Line Items]
Discount rate	2.69%	3.50%
Prior service cost	$ 0
Pre-tax unfunded pension obligation gain (loss)	$ (1,800,000)
Asset performance rate of return assumption	6.50%
Expected long-term return on plan assets	7.00%	7.00%	8.00%
Contribution to pension plan	$ 0
Expense for contribution plan	5,900,000	$ 4,900,000	$ 5,600,000
Expense for the supplemental profit sharing plan	1,100,000	1,100,000	$ 200,000
Supplemental profit sharing plan unfunded status	$ 7,100,000	$ 6,100,000
Decrease in Discount Rate [Member]
Pension And Other Employee Benefit Plans [Line Items]
Discount rate	0.81%
Pre-tax unfunded pension obligation gain (loss)	$ (5,000,000)
Gain on Industry Updates to Mortality Table [Member]
Pension And Other Employee Benefit Plans [Line Items]
Pre-tax unfunded pension obligation gain (loss)	200,000
Demographic Changes [Member]
Pension And Other Employee Benefit Plans [Line Items]
Pre-tax unfunded pension obligation gain (loss)	200,000
Asset Performance [Member]
Pension And Other Employee Benefit Plans [Line Items]
Pre-tax unfunded pension obligation gain (loss)	$ 2,800,000

Pension Plans - Amount Recogniz

Pension Plans - Amount Recognized in Accumulated Other Comprehensive Loss Related to Pension Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Compensation Income Net Of Tax [Abstract]
Beginning Balance	$ (5,671)	$ (5,873)
Pre-tax amortized net actuarial loss	475	520
Tax provision	(112)	(123)
Net of reclassification adjustments	363	397	$ 386
Pre-tax loss	(1,829)	(255)
Tax provision	433	60
Net of tax adjustment to recognize (loss) gain on unfunded pension obligations	(1,396)	(195)	(244)
Ending Balance	$ (6,704)	$ (5,671)	$ (5,873)

Pension Plans - Accumulated Ben

Pension Plans - Accumulated Benefit Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets [Abstract]
Accumulated benefit obligation	$ 42,582	$ 37,936
Fair market value of assets	$ 36,756	$ 32,658

Pension Plans - Weighted-Averag

Pension Plans - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation [Abstract]
Discount rate	2.69%	3.50%
Rate of compensation increase	0.00%	0.00%

Pension Plans - Weighted-Aver_2

Pension Plans - Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.50%	3.50%	4.25%
Rate of compensation increase	0.00%	0.00%	0.00%
Expected long-term return on plan assets	7.00%	7.00%	8.00%

Pension Plans - Fair Value of t

Pension Plans - Fair Value of the Company's Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Assets measured at net asset value	$ 36,756	$ 32,658
Pooled Investment Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at net asset value	$ 36,756	$ 32,658

Pension Plans - Weighted-Aver_3

Pension Plans - Weighted-Average Asset Allocations of Plan Assets (Detail)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	47.00%	48.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	53.00%	51.00%
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	0.00%	1.00%

Pension Plans - Weighted-Aver_4

Pension Plans - Weighted-Average Target Allocations of Plan Assets (Detail)	Dec. 31, 2020
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	40.00%
Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	60.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	40.00%
Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	60.00%
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	0.00%
Cash and Equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	0.00%
Cash and Equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	10.00%

Pension Plans - Aggregate Benef

Pension Plans - Aggregate Benefits Expected to be Paid Out of Plan Assets (Detail) $ in Thousands	Dec. 31, 2020USD ($)
Compensation And Retirement Disclosure [Abstract]
2021	$ 1,273
2022	1,359
2023	1,449
2024	1,540
2025	1,616
2026-2030	$ 9,344

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income ("AOCI") - Summary of Total Changes in AOCI by Component, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 268,535
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	3,835	$ 2,028
Loss on unfunded pension obligations	(1,396)	(195)	$ (244)
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial loss	363	397
Other comprehensive income (loss), net of tax	2,802	2,230	(12,143)
Ending Balance	292,078	268,535
Unrecognized Benefit Cost [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,671)	(5,873)
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	0	0
Loss on unfunded pension obligations	(1,396)	(195)	(244)
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial loss	363	397
Other comprehensive income (loss), net of tax	(1,033)	202
Ending Balance	(6,704)	(5,671)	(5,873)
Cumulative Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(51,682)	(53,710)
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	3,835	2,028
Loss on unfunded pension obligations	0	0
Amounts reclassified from AOCI:
Amortization of defined benefit pension actuarial loss	0	0
Other comprehensive income (loss), net of tax	3,835	2,028
Ending Balance	(47,847)	(51,682)	(53,710)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(57,353)	(59,583)
Amounts reclassified from AOCI:
Ending Balance	$ (54,551)	$ (57,353)	$ (59,583)

Debt and Credit Arrangements -

Debt and Credit Arrangements - Debt and Credit Arrangements (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Short-term debt
Current portion of long-term debt	$ 5,216	$ 3,354
Short-term debt	22,644	12,050
Long-term debt
Total long-term debt	38,549	57,076
Total long-term debt, less current portion	33,333	53,722
Total debt	55,977	65,772
Thailand Bhat Denominated Secured Notes Short-term Debt at 3.60% [Member]
Short-term debt
Short-term debt	5,291	3,670
Thailand Bhat Denominated Secured Notes Short-term Debt at 3.29% [Member]
Short-term debt
Short-term debt	2,384	1,882
Thailand Bhat Denominated Secured Notes Short-term Debt at 2.97% [Member]
Short-term debt
Short-term debt	957	0
France Euro Denominated Secured Notes Short-term Debt at 2.50% [Member]
Short-term debt
Short-term debt	6,142	0
Brazil Real Denominated Secured Notes Short-term Debt at 2.83% [Member]
Short-term debt
Short-term debt	0	1,152
Brazil Real Denominated Secured Notes Short-term Debt at 5.40% [Member]
Short-term debt
Short-term debt	1,854	752
Brazil Real Denominated Secured Notes Short-term Debt at 9.40% [Member]
Short-term debt
Short-term debt	0	1,240
Brazil Real Denominated Secured Notes Short-term Debt at 3.30% [Member]
Short-term debt
Short-term debt	800	0
U.S. Dollar Denominated Current Portion of Long Term Debt at 2.71% [Member]
Short-term debt
Current portion of long-term debt	0	1,448
Austria Euro Denominated Current Portion of Long Term Debt at 2.48% [Member]
Short-term debt
Current portion of long-term debt	25	30
Austria Euro Denominated Current Portion of Long Term Debt at 1.40% [Member]
Short-term debt
Current portion of long-term debt	0	560
Austria Euro Denominated Current Portion of Long Term Debt at 3.00% [Member]
Short-term debt
Current portion of long-term debt	22	22
Indonesia U.S. Dollar Denominated Current Portion of Long Term Debt at 3.50% [Member]
Short-term debt
Current portion of long-term debt	800	800
New Zealand U.S. Dollar Denominated Current Portion of Long Term Debt at 3.25% [Member]
Short-term debt
Current portion of long-term debt	4,369	494
Brazilian Real Denominated Long-term Debt at 4.60%, Due 2022 [Member]
Long-term debt
Total long-term debt	68	147
Australian Dollar Denominated Long Term Debt at 1.15% Due 2024 [Member]
Long-term debt
Total long-term debt	5,288	5,526
U.S. Dollar Denominated Long Term Debt at 1.27%, Due 2024 [Member]
Long-term debt
Total long-term debt	12,706	21,552
U.S. Dollar Denominated Long Term Debt at 2.71%, Due 2026 [Member]
Long-term debt
Total long-term debt	0	9,535
Brazilian Real Denominated Long-term Debt at 8.30%, Due 2025 [Member]
Long-term debt
Total long-term debt	1,800	0
Poland Zloty Denominated Long Term Debt at 1.33% Due 2024 [Member]
Long-term debt
Total long-term debt	6,696	6,524
Austria Euro Denominated Long Term Debt at 2.48% Due 2022 [Member]
Long-term debt
Total long-term debt	25	0
Austria Euro Denominated Long Term Debt at 2.32% Due 2030 [Member]
Long-term debt
Total long-term debt	128	224
Austria Euro Denominated Long Term Debt at 2.76% Due 2022 [Member]
Long-term debt
Total long-term debt	67	0
Indonesia U.S Dollar Denominated Long Term Debt at 3.50% Due 2024 [Member]
Long-term debt
Total long-term debt	6,667	7,467
Austria Euro Denominated Long Term Debt at 1.27% Due 2024 [Member]
Long-term debt
Total long-term debt	614	560
Austria Euro Denominated Long Term Debt at 3.00% Due 2025 [Member]
Long-term debt
Total long-term debt	121	134
New Zealand Dollar Denominated Long Term Debt at 3.25% Due 2021 [Member]
Long-term debt
Total long-term debt	4,369	0
New Zealand Dollar Denominated Long Term Debt at 3.90% Due 2021 [Member]
Long-term debt
Total long-term debt	$ 0	$ 5,407

Debt and Credit Arrangements _2

Debt and Credit Arrangements - Debt and Credit Arrangements (Parenthetical) (Detail)	Dec. 31, 2020	Dec. 31, 2019
Thailand Bhat Denominated Secured Notes Short-term Debt at 3.60% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.60%	3.60%
Thailand Bhat Denominated Secured Notes Short-term Debt at 3.29% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.29%	3.29%
Thailand Bhat Denominated Secured Notes Short-term Debt at 2.97% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.97%	2.97%
France Euro Denominated Secured Notes Short-term Debt at 2.50% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.50%	2.50%
Brazil Real Denominated Secured Notes Short-term Debt at 2.83% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.83%	2.83%
Brazil Real Denominated Secured Notes Short-term Debt at 5.40% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.40%	5.40%
Brazil Real Denominated Secured Notes Short-term Debt at 9.40% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9.40%	9.40%
Brazil Real Denominated Secured Notes Short-term Debt at 3.30% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.30%	3.30%
U.S. Dollar Denominated Current Portion of Long Term Debt at 2.71% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.71%	2.71%
Austria Euro Denominated Current Portion of Long Term Debt at 2.48% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.48%	2.48%
Austria Euro Denominated Current Portion of Long Term Debt at 1.40% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.40%	1.40%
Austria Euro Denominated Current Portion of Long Term Debt at 3.00% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.00%	3.00%
Indonesia U.S. Dollar Denominated Current Portion of Long Term Debt at 3.50% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.50%	3.50%
New Zealand U.S. Dollar Denominated Current Portion of Long Term Debt at 3.25% [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.25%	3.25%
U.S. Dollar Denominated Long Term Debt at 1.27%, Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.27%	1.27%
U.S. Dollar Denominated Long Term Debt at 2.71%, Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.71%	2.71%
Brazilian Real Denominated Long-term Debt at 4.60%, Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.60%	4.60%
Brazilian Real Denominated Long-term Debt at 8.30%, Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	8.30%	8.30%
Poland Zloty Denominated Long Term Debt at 1.33% Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.33%	1.33%
Australian Dollar Denominated Long Term Debt at 1.15% Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.15%	1.15%
Austria Euro Denominated Long Term Debt at 2.48% Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.48%	2.48%
Austria Euro Denominated Long Term Debt at 2.32% Due 2030 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.32%	2.32%
Austria Euro Denominated Long Term Debt at 2.76% Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.76%	2.76%
Austria Euro Denominated Long Term Debt at 1.27% Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.27%	1.27%
Austria Euro Denominated Long Term Debt at 3.00% Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.00%	3.00%
Indonesia U.S Dollar Denominated Long Term Debt at 3.50% Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.50%	3.50%
New Zealand Dollar Denominated Long Term Debt at 3.25% Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.25%	3.25%
New Zealand Dollar Denominated Long Term Debt at 3.90% Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.90%	3.90%

Debt and Credit Arrangements _3

Debt and Credit Arrangements - Additional Information (Detail) € in Millions	Jun. 26, 2020USD ($)	Apr. 17, 2020USD ($)	Aug. 14, 2019USD ($)	Apr. 25, 2019USD ($)	Aug. 22, 2016	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2020EUR (€)	Dec. 22, 2020USD ($)	Sep. 30, 2020USD ($)
Debt Instrument [Line Items]
Debt to earnings before Interest, Taxes and Depreciation ratio		225.00%
Line of credit utilized borrowing capacity						$ 25,400,000
Line of credit remaining borrowing capacity						39,600,000
Letters of credit outstanding amount						100,000
Proceeds from long-term debt						90,847,000	$ 93,036,000	$ 76,030,000
Aggregate maturities of long-term debt for 2021						22,600,000
Aggregate maturities of long-term debt for 2022						1,000,000
Aggregate maturities of long-term debt for 2023						800,000
Aggregate maturities of long-term debt for 2024						26,100,000
Aggregate maturities of long-term debt there after						5,400,000
Interest paid						1,900,000	2,000,000	$ 1,800,000
Total outstanding guarantees						9,800,000
Letter of credit outstanding						8,000,000
Corporate Aircraft [Member]
Debt Instrument [Line Items]
Line of credit utilized borrowing capacity						$ 0
Line of credit outstanding amount										$ 8,100,000
Outstanding letters of credit, current										$ 1,400,000
Debt instrument, face amount											$ 6,800,000
U.S. [Member]
Debt Instrument [Line Items]
Interest rate for Line of credit						1.325%			1.325%
Asia Pacific [Member]
Debt Instrument [Line Items]
Restricted cash used to secure bank debt						$ 600,000	$ 300,000
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]
Increased borrowing capacity		$ 65,000,000
Extended debt instrument date		Jun. 30, 2024			Jun. 30, 2021
Line of credit utilized borrowing capacity						$ 1,100,000			€ 1
Expiration date						May 31, 2021
Interest rate						3.00%			3.00%
Austrian Subsidiary [Member] | Line Credit [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt	$ 600,000
Interest rate	1.273%
Polish Subsidiary [Member]
Debt Instrument [Line Items]
Borrowings						$ 6,700,000
Interest rate for Line of credit						1.269%			1.269%
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						$ 5,300,000
Expiration date						Jun. 30, 2024
Interest rate for Line of credit						1.145%			1.145%
Indonesian Subsidiary [Member]
Debt Instrument [Line Items]
Line of credit utilized borrowing capacity						$ 6,700,000
Outstanding letters of credit, current						800,000
Expiration date				Apr. 30, 2024
Proceeds from long-term debt				$ 8,000,000
Interest rate				3.501%
New Zealand Subsidiary {Member}
Debt Instrument [Line Items]
Outstanding letters of credit, current						$ 4,400,000
Expiration date			Aug. 26, 2021
Proceeds from long-term debt			$ 5,300,000
Interest rate			3.90%			3.25%			3.25%

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
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 7 months 6 days
Operating lease, weighted average remaining lease term	17 years 8 months 12 days
Operating lease, weighted average discount rate, percent	4.46%	4.46%
Finance lease, weighted average discount rate, percent	4.33%	4.33%
Total minimum sublease rentals under noncancelable subleases	$ 2.6
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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Components of lease expense
Operating lease cost	$ 2,957	$ 3,138
Finance lease cost
Amortization of right-of-use assets	66	67
Interest on lease liabilities	9	11
Total lease cost	$ 3,032	$ 3,216

Leases - Schedule of Future Mat

Leases - Schedule of Future Maturities of Lease Liabilities (Detail) $ in Thousands	Dec. 31, 2020USD ($)
Operating Leases
2021	$ 2,580
2022	2,156
2023	1,482
2024	777
2025 and thereafter	9,928
Total lease payments	16,923
Less amount of lease payment representing interest	5,940
Total present value of lease payments	10,983
Finance Leases
2021	83
2022	64
2023	60
2024	30
2025 and thereafter	19
Total lease payments	256
Less amount of lease payment representing interest	19
Total present value of lease payments	$ 237

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,793	$ 5,321
Operating cash flows from finance leases	9	11
Financing cash flows from finance leases	$ 118	$ 100

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Reconciliation [Line Items]
Net tax provision	$ 10,810,000	$ 8,122,000	$ 6,007,000
Cash taxes paid net of refunds	7,700,000	7,800,000	5,600,000
Net operating loss carryforwards, indefinite	$ 5,400,000
Foreign net operating loss carryforwards expiration period start year	2024
Foreign net operating loss carryforwards expiration period end year	2030
Valuation allowance	$ 2,912,000	3,137,000
Net decrease in valuation allowance from the prior year	(300,000)
Tax liability, undistributed earnings of foreign subsidiaries	115,800,000
Uncertain tax position expired	52,000	0	0
Accrued interest			0
Accrued penalties			$ 0
Accrue interest and penalties expire in next twelve months	100,000
Maximum [Member]
Income Tax Reconciliation [Line Items]
Accrued interest	100,000	100,000
Accrued penalties	100,000	$ 100,000
Income Tax Provision [Member]
Income Tax Reconciliation [Line Items]
Net decrease in valuation allowance from the prior year	(200,000)
Foreign Country [Member]
Income Tax Reconciliation [Line Items]
Net operating loss carryforwards	7,000,000
Net operating loss carryforwards, definite	$ 1,600,000

Income Taxes - Income Before In

Income Taxes - Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ 22,725	$ 11,353	$ 10,268
Foreign	17,846	20,105	22,320
INCOME BEFORE INCOME TAXES	$ 40,571	$ 31,458	$ 32,588

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 7,909	$ 2,835	$ (904)
Foreign	5,093	6,170	6,247
State and local	1,188	391	350
Current, Total	14,190	9,396	5,693
Deferred
Federal	(2,290)	(10)	801
Foreign	(445)	(1,347)	(608)
State and local	(645)	83	121
Deferred Total	(3,380)	(1,274)	314
Income taxes	$ 10,810	$ 8,122	$ 6,007

Income Taxes - Differences Betw

Income Taxes - Differences Between the Provision for Income Taxes at the U.S. Federal Statutory Rate and the Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U. S. federal statutory tax rate	21.00%	21.00%	21.00%
Federal tax at statutory rate	$ 8,520	$ 6,606	$ 6,843
State and local taxes, net of federal benefit	942	308	273
U.S. federal permanent items	1,323	621	240
Global intangible low-taxed income	1,222	1,738	1,721
Foreign tax credits	(1,204)	(1,422)	(1,707)
Transition tax	0	0	(1,780)
Non-U.S. tax rate variances	1,330	929	1,011
Valuation allowance	(245)	(346)	(57)
Tax credits	(349)	(464)	(295)
Tax act impact, deferred rate	0	0	(680)
Other, net	(729)	152	438
Income taxes	$ 10,810	$ 8,122	$ 6,007

Income Taxes - Tax Effects of T

Income Taxes - Tax Effects of Temporary Differences That Give Rise to the Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Accrued compensation and benefits	$ 1,518	$ 1,180
Inventory valuation reserves	2,535	2,384
Allowance for doubtful accounts	480	473
Benefit plan reserves	7,564	7,586
Net operating loss carryforwards	1,851	3,003
Other accrued expenses	3,825	3,012
Unrealized foreign exchange	799	718
Other	284	0
Gross deferred tax assets	18,856	18,356
Valuation allowance	(2,912)	(3,137)
Net deferred tax assets	15,944	15,219
Deferred tax liabilities:
Depreciation and other basis differences	(4,514)	(6,867)
Intangibles	(3,419)	(3,742)
Other	(69)	(162)
Deferred tax liabilities	(8,002)	(10,771)
Net deferred tax assets	7,942	4,448
Deferred income tax expense
Ordinary movement	3,380	1,275
Deferred tax balances from business acquisition	0	(1,883)
Items of other comprehensive income (loss)	319	(62)
Currency translation	(205)	(71)
Total change in net deferred tax assets	$ 3,494	$ (741)

Income Taxes - Changes in Unrec

Income Taxes - Changes in Unrecognized Tax Benefits Excluding Interest and Penalties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Balance at January 1	$ 118	$ 0	$ 0
Additions for tax positions of current year	0	0	0
Additions for tax positions of prior years	0	118	0
Reductions for tax positions of prior years	0	0	0
Expiration of statutes of limitations	(52)	0	0
Balance at December 31	$ 66	$ 118	$ 0

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020USD ($)Deferral$ / sharesshares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)shares	May 10, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted under incentive plan	81,086
Forfeiture of restricted stock based unit	13,814
Deferred shares and held by the rabbi trust	265,508	267,641
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards	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
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses | $	$ 400,000	$ 500,000	$ 500,000
Compensation cost expected to be recognized over period | $	$ 5,000,000
Weighted-average period	1 year 8 months 12 days
Time-Based RSUs [Member] | Former Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture of restricted stock based unit	2,763
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period	1 year 8 months 12 days
Performance-based compensation expense (income) | $	$ 3,500,000	3,900,000	3,700,000
Remaining compensation expense | $	$ 3,600,000
Performance-Based RSUs [Member] | Former Officer [Member] | Grant 2020, 2019 and 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture of restricted stock based unit	11,051
Service and Performance-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefits from restricted share awards | $	$ 400,000	$ 500,000	$ 200,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards	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
Restricted shares granted under incentive plan	316,685
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
Granted, Number of Shares	40,500
Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of deferrals | Deferral	2
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	25,500	5,000	5,000
Compensation expenses | $	$ 100,000
Weighted-average period	2 years 2 months 12 days
Estimated Forfeitures | $	$ 0
Weighted average grant date fair value options granted | $ / shares	$ 48.13
Exercised, Number of Shares	5,050	4,000	3,500
Total intrinsic value of stock options | $		$ 100,000	$ 100,000
Cash received for the exercise of stock options | $	$ 200,000	200,000
Expected compensation cost related to unvested awards not yet recognized | $	300,000
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
Total intrinsic value of stock options | $	100,000
Excess tax benefits | $	$ 100,000	$ 100,000	$ 100,000

Share-Based Compensation - Summ

Share-Based Compensation - Summary of RSUs (Detail)	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2020	211,634
Granted	81,086
Vested	(79,343)
Forfeited	(13,814)
Nonvested as of December 31, 2020	199,563
Nonvested as of January 1, 2019, Weighted-Average Grant-Date Fair Value | $ / shares	$ 53.68
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	54.25
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	56.13
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	61.29
Nonvested as of December 31, 2019, Weighted-Average Grant- Date Fair Value | $ / shares	$ 60.33
Performance and Service Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2020	196,342
Granted	71,539
Vested	(73,053)
Forfeited	(11,051)
Nonvested as of December 31, 2020	183,777
Service Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2020	15,292
Granted	9,547
Vested	(6,290)
Forfeited	(2,763)
Nonvested as of December 31, 2020	15,786

Share-Based Compensation - Weig

Share-Based Compensation - Weighted-Average Assumptions for Estimating Fair Values (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	1.80%	1.80%	2.80%
Dividend yield	1.60%	1.60%	1.60%
Expected life (years)	5 years	5 years	5 years
Expected volatility	42.00%	42.00%	40.00%

Share-Based Compensation - Acti

Share-Based Compensation - Activity in Company's Plan - Long Term Incentive Plan (Detail) - Long Term Incentive Plan Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2020, Number of Shares	31,750
Granted, Number of Shares	25,500	5,000	5,000
Exercised, Number of Shares	(5,050)	(4,000)	(3,500)
Forfeited, Number of Shares	(1,250)
Outstanding (vested and expected to vest) at December 31, 2020, Number of Shares	50,950
Exercisable at December 31, 2020, Number of Shares	21,700
Outstanding at January 1, 2020, Weighted Average Exercise Price per Share	$ 58.77
Granted, Weighted Average Exercise Price per Share	48.13
Exercised, Weighted Average Exercise Price per Share	47.68
Forfeited, Weighted Average Exercise Price per Share	48
Outstanding (vested and expected to vest) at December 31, 2020, Weighted Average Exercise Price per Share	54.81
Exercisable at December 31, 2020, Weighted Average Exercise Price per Share	$ 61.77
Outstanding (vested and expected to vest) at December 31, 2020, Weighted Average Remaining Contractual Term	7 years 6 months
Exercisable at December 31, 2020, Weighted Average Remaining Contractual Term	5 years
Outstanding (vested and expected to vest) at December 31, 2020, Aggregate Intrinsic Value	$ 726
Exercisable at December 31, 2020, Aggregate Intrinsic Value	$ 151

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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator
Net income	$ 29,803	$ 23,303	$ 26,581
Determination of shares (in thousands)
Weighted-average common shares outstanding	4,923	5,031	5,032
Dilutive effect - share-based awards	61	56	75
Diluted weighted-average common shares outstanding	4,984	5,087	5,107
Earnings per common share
Basic	$ 6.05	$ 4.63	$ 5.28
Diluted	$ 5.98	$ 4.58	$ 5.21

Computation of Earnings Per S_4

Computation of Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from calculation of earnings per share	37,919	15,041	260

Goodwill and Other Intangible_2

Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-lived intangible assets
Gross Carrying Amount	$ 31,962	$ 30,648
Accumulated Amortization	(17,519)	(15,532)
Indefinite-lived intangible assets Goodwill	29,508	27,840	$ 15,621
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,806	4,806
Accumulated Amortization	(4,806)	(4,806)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,286	1,128
Accumulated Amortization	(396)	(331)
Trademark [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,756	1,718
Accumulated Amortization	(1,474)	(1,358)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	7,673	7,185
Accumulated Amortization	(2,402)	(1,708)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	16,441	15,811
Accumulated Amortization	$ (8,441)	$ (7,329)

Goodwill and Other Intangible_3

Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)	Oct. 01, 2020	Oct. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Goodwill impairment adjustment	$ 0	$ 0
Purchase price allocation adjustments				$ (6,487,000)
Definite lived intangible assets			$ 14,443,000	15,116,000
Amortization of Intangible Assets			1,800,000	1,500,000	$ 1,500,000
2021			1,700,000
2022			1,600,000
2023			1,600,000
2024			1,600,000
2025			$ 1,400,000
Remaining amortization period			12 years 4 months 24 days
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			5 years
Land Use Rights [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			55 years 7 months 6 days
Trademark [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			8 years 7 months 6 days
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			10 years 1 month 6 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			9 years 6 months
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Amortization period of intangible assets			1 year
Minimum [Member] | Actual [Member]
Finite Lived Intangible Assets [Line Items]
Amortization period of intangible assets			4 years
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Amortization period of intangible assets			20 years
Maximum [Member] | Actual [Member]
Finite Lived Intangible Assets [Line Items]
Amortization period of intangible assets			82 years
EMEA [Member]
Finite Lived Intangible Assets [Line Items]
Purchase price allocation adjustments				(6,487,000)
Definite lived intangible assets				6,300,000
Inventory step-up allocation				$ 200,000

Goodwill and Other Intangible_4

Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Beginning Balance	$ 27,840	$ 15,621
Currency translation	1,668	87
Goodwill acquired during the year		18,619
Purchase price allocation adjustments		(6,487)
Ending Balance	29,508	27,840
USA [Member]
Goodwill [Line Items]
Beginning Balance	3,078	3,078
Currency translation	0	0
Goodwill acquired during the year		0
Purchase price allocation adjustments		0
Ending Balance	3,078	3,078
The Americas [Member]
Goodwill [Line Items]
Beginning Balance	4,158	3,997
Currency translation	93	161
Goodwill acquired during the year		0
Purchase price allocation adjustments		0
Ending Balance	4,251	4,158
EMEA [Member]
Goodwill [Line Items]
Beginning Balance	13,442	1,355
Currency translation	1,007	(45)
Goodwill acquired during the year		18,619
Purchase price allocation adjustments		(6,487)
Ending Balance	14,449	13,442
Asia-Pacific [Member]
Goodwill [Line Items]
Beginning Balance	7,162	7,191
Currency translation	568	(29)
Goodwill acquired during the year		0
Purchase price allocation adjustments		0
Ending Balance	$ 7,730	$ 7,162

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	Dec. 31, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	$ 359
Total Assets	359
Supplemental profit sharing plan	7,143	$ 6,059
Foreign currency forward contracts	56
Earn-out	0	581
Total Liabilities	7,199	6,640
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
Total Assets	0
Supplemental profit sharing plan	0	0
Foreign currency forward contracts	0
Earn-out	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	359
Total Assets	359
Supplemental profit sharing plan	7,143	6,059
Foreign currency forward contracts	56
Earn-out	0	0
Total Liabilities	7,199	6,059
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Foreign currency forward contracts	0
Total Assets	0
Supplemental profit sharing plan	0	0
Foreign currency forward contracts	0
Earn-out	0	581
Total Liabilities	$ 0	$ 581

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
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 (losses)	$ 400	$ (200)
Supplemental profit sharing plan	7,143	6,059
Contingent liabilities	0	581
Other Noncurrent Liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent liabilities	0	600
Profit Sharing Plan [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Supplemental profit sharing plan	$ 7,100	$ 6,100

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities - Fair Value and Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Long-term debt and related current maturities, Fair Value	$ 38,726	$ 56,539
Long-term debt and related current maturities, Carrying Value	$ 38,549	$ 57,076

Revenue - Revenues by Segment a

Revenue - Revenues by Segment and Product Type (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	66.00%	67.00%
Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	24.00%	22.00%
Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	10.00%	11.00%
PLP-USA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
PLP-USA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	62.00%	62.00%
PLP-USA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	32.00%	30.00%
PLP-USA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	6.00%	8.00%
The Americas [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
The Americas [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	78.00%	67.00%
The Americas [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	17.00%	27.00%
The Americas [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	5.00%	6.00%
EMEA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
EMEA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	57.00%	68.00%
EMEA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	36.00%	24.00%
EMEA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	7.00%	8.00%
Asia-Pacific [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
Asia-Pacific [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	70.00%	72.00%
Asia-Pacific [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	4.00%	6.00%
Asia-Pacific [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	26.00%	22.00%

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)SegmentCustomer	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable segment | Segment	4
Number of major customers accounted for revenue | Customer	0
Net sales	$ 466,449	$ 444,861	$ 420,878
USA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	201,300	178,300	$ 169,000
Long-lived assets	$ 44,200	$ 51,100

Segment Information - Summary o

Segment Information - Summary of Company's Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales
Net sales	$ 466,449	$ 444,861	$ 420,878
Interest income
Interest income	259	783	486
Interest expense
Interest expense	(2,396)	(2,217)	(1,290)
Income taxes
Income taxes	10,810	8,122	6,007
Net income attributable to Preformed Line Products Company shareholders
Net income	29,803	23,303	26,581
Expenditure for long-lived assets
Expenditure for long-lived assets	24,569	29,467	9,528
Depreciation and amortization
Depreciation and amortization	13,838	13,748	12,444
Identifiable assets
Identifiable assets	461,087	433,571
Property, plant and equipment
Property, plant and equipment - net	125,965	124,018
PLP-USA [Member]
Net sales
Net sales	201,277	178,301	169,040
Interest income
Interest income	0	0	0
Interest expense
Interest expense	(741)	(972)	(1,023)
Income taxes
Income taxes	6,161	3,299	367
Net income attributable to Preformed Line Products Company shareholders
Net income	16,564	8,054	9,900
Expenditure for long-lived assets
Expenditure for long-lived assets	9,536	4,928	3,672
Depreciation and amortization
Depreciation and amortization	5,321	5,393	5,452
Identifiable assets
Identifiable assets	137,689	127,428
Property, plant and equipment
Property, plant and equipment - net	44,184	51,097
The Americas [Member]
Net sales
Net sales	74,192	68,293	66,868
Interest income
Interest income	112	412	273
Interest expense
Interest expense	(586)	(466)	(111)
Income taxes
Income taxes	2,461	2,551	3,349
Net income attributable to Preformed Line Products Company shareholders
Net income	5,068	6,657	8,479
Expenditure for long-lived assets
Expenditure for long-lived assets	3,527	2,864	1,746
Depreciation and amortization
Depreciation and amortization	1,710	1,862	1,488
Identifiable assets
Identifiable assets	75,438	71,908
Property, plant and equipment
Property, plant and equipment - net	16,507	15,874
EMEA [Member]
Net sales
Net sales	91,108	79,158	69,773
Interest income
Interest income	67	192	102
Interest expense
Interest expense	(233)	(149)	(58)
Income taxes
Income taxes	1,768	616	1,204
Net income attributable to Preformed Line Products Company shareholders
Net income	6,644	2,935	3,527
Expenditure for long-lived assets
Expenditure for long-lived assets	3,007	5,304	1,591
Depreciation and amortization
Depreciation and amortization	2,797	2,528	1,808
Identifiable assets
Identifiable assets	106,922	97,126
Property, plant and equipment
Property, plant and equipment - net	18,362	16,419
Asia-Pacific [Member]
Net sales
Net sales	99,872	119,109	115,197
Interest income
Interest income	80	179	111
Interest expense
Interest expense	(836)	(630)	(98)
Income taxes
Income taxes	420	1,656	1,087
Net income attributable to Preformed Line Products Company shareholders
Net income	1,527	5,657	4,675
Expenditure for long-lived assets
Expenditure for long-lived assets	8,499	16,371	2,519
Depreciation and amortization
Depreciation and amortization	4,010	3,965	3,696
Identifiable assets
Identifiable assets	141,038	137,109
Property, plant and equipment
Property, plant and equipment - net	46,912	40,628
Intersegment Eliminations [Member]
Net sales
Net sales	(37,774)	(32,626)	(34,699)
Intersegment Eliminations [Member] | PLP-USA [Member]
Net sales
Net sales	(9,702)	(10,757)	(11,648)
Intersegment Eliminations [Member] | The Americas [Member]
Net sales
Net sales	(9,938)	(7,774)	(9,480)
Intersegment Eliminations [Member] | EMEA [Member]
Net sales
Net sales	(3,682)	(1,375)	(1,664)
Intersegment Eliminations [Member] | Asia-Pacific [Member]
Net sales
Net sales	$ (14,452)	$ (12,720)	$ (11,907)

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)

Dec. 15, 2020$ / sharesshares

Feb. 05, 2020$ / sharesshares

Jan. 02, 2020$ / sharesshares

Dec. 19, 2019$ / sharesshares

Dec. 12, 2019$ / sharesshares

Jul. 02, 2019$ / sharesshares

Feb. 06, 2019$ / sharesshares

Dec. 18, 2018$ / sharesshares

Sep. 14, 2018$ / sharesshares

Aug. 23, 2018$ / sharesshares

Aug. 07, 2018$ / sharesshares

Jun. 15, 2018$ / sharesshares

Jun. 01, 2018$ / sharesshares

May 10, 2018$ / sharesshares

Mar. 15, 2018$ / sharesshares

Feb. 06, 2018$ / sharesshares

Dec. 31, 2020USD ($)Employee

Dec. 31, 2019USD ($)Employee

Dec. 31, 2018USD ($)

Related Party Transaction [Line Items]

Loan amount due

$ 38,549,000

$ 57,076,000

Austrian Subsidiary [Member]

Related Party Transaction [Line Items]

Interest rate

3.00%

Loan amount due

$ 100,000

Debt instrument expiration year

2025

Related party transaction lease expenses paid

$ 200,000

100,000

Czech Republic Subsidiary [Member]

Related Party Transaction [Line Items]

Related party transaction lease expenses paid

$ 200,000

$ 200,000

Related party transaction lease expiration term

5 years

5 years

Number of employees | Employee

2

2

Retired Officer [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

1,157

6,326

952

35

8,800

Shares price per share | $ / shares

$ 67.71

$ 71.75

$ 51.20

$ 57.85

$ 73.53

Number of trading days to be considered for average price of stock repurchased

30 days

30 days

30 days

30 days

30 days

Current Officers and Retired Officer [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

39,208

36,413

17,141

7,877

Shares price per share | $ / shares

$ 58.65

$ 56.44

$ 87.19

$ 80.20

Number of trading days to be considered for average price of stock repurchased

30 days

30 days

30 days

30 days

Officer [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

19,900

20,862

7,500

1,500

3,200

1,430

Shares price per share | $ / shares

$ 62.71

$ 70.39

$ 80.95

$ 77.06

$ 68.10

$ 63.63

Number of trading days to be considered for average price of stock repurchased

30 days

30 days

30 days

30 days

30 days

30 days

Employee [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

2,000

Shares price per share | $ / shares

$ 83.53

Number of trading days to be considered for average price of stock repurchased

30 days

X Information Technology [Member]

Related Party Transaction [Line Items]

Service expense

$ 0

$ 100,000

$ 200,000

Baker & Hostetler LLP [Member]

Related Party Transaction [Line Items]

Legal fees

$ 100,000

$ 100,000

$ 100,000

Business Combinations - Additio

Business Combinations - Additional Information (Detail) € in Millions	Apr. 01, 2019USD ($)	Feb. 28, 2019USD ($)	Feb. 28, 2019EUR (€)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Business Acquisition [Line Items]
Payments of business, net of cash acquired				$ 0	$ 18,894,000	$ 0
Goodwill				29,508,000	27,840,000	$ 15,621,000
Intangibles - net				14,443,000	15,116,000
SubCon [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired		100.00%
Total purchase price		$ 10,100,000
Payments of business, net of cash acquired		1,900,000
Goodwill		6,600,000
Intangibles - net		4,700,000
Purchase price estimated contingent liability		$ 600,000		0
Potential maximum payment | €			€ 4
SubCon [Member] | Other Noncurrent Liabilities [Member]
Business Acquisition [Line Items]
Business combination earn-out liability				$ 0	$ 600,000
MICOS Telecom [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired	90.00%
Total purchase price	$ 8,800,000
Payments of business, net of cash acquired	500,000
Goodwill	5,600,000
Intangibles - net	$ 3,400,000
Useful lives	12 years
Business acquisition, percentage of remaining voting interests to be acquired	10.00%
Business acquisition, maximum period, remaining voting interests to be acquired	3 years
Percentage of remaining voting interests deferred consideration payable	10.00%
MICOS Telecom [Member] | Other Noncurrent Liabilities [Member]
Business Acquisition [Line Items]
Business combination hold-back liability	$ 1,500,000
Business combination hold-back liability payable term	2 years
Business combination deferred consideration	$ 900,000
Maximum [Member]
Business Acquisition [Line Items]
Useful lives				20 years
Maximum [Member] | SubCon [Member]
Business Acquisition [Line Items]
Useful lives		11 years	11 years
Minimum [Member]
Business Acquisition [Line Items]
Useful lives				1 year
Minimum [Member] | SubCon [Member]
Business Acquisition [Line Items]
Useful lives		10 years	10 years

Business Combinations - Summary

Business Combinations - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets acquired
Goodwill	$ 29,508	$ 27,840	$ 15,621
SubCon and MICOS Telcom [Member]
Assets acquired
Current assets, net of cash	5,976
Property, plant and equipment	1,189
Goodwill	12,132
Finite-lived intangible assets	8,092
Other long-term assets	1,883
Total assets acquired	29,272
Liabilities assumed	(10,378)
Net assets acquired	$ 18,894

Product Warranty Reserve - Roll

Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period balance	$ 1,309	$ 928	$ 1,076
Additions charged to costs and expenses	279	481	97
Warranty usage	(314)	(317)	(133)
Currency translation	8	217	(112)
End of period balance	$ 1,282	$ 1,309	$ 928

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Corporate Aircraft [Member] - USD ($) $ in Millions	Jan. 19, 2021	Dec. 31, 2020	Sep. 30, 2020
Subsequent Event [Line Items]
Debt instrument, face amount			$ 6.8
Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Subsequent Event [Line Items]
Debt instrument, description		The loan is payable in 119 equal monthly installments, commencing on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date.
Subsequent Event [Member] | Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Subsequent Event [Line Items]
Debt instrument, face amount	$ 20.5
Debt instrument, payment terms	120 months
Debt instrument, fixed 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

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 3,224	$ 2,652	$ 2,910
Additions charged to costs and expenses	1,279	1,294	449
Deductions	(1,527)	(697)	(529)
Other additions or deductions	(128)	(25)	(178)
Balance at end of period	2,848	3,224	2,652
Reserve for Credit Memos [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	625	526	415
Additions charged to costs and expenses	774	817	802
Deductions	(792)	(739)	(688)
Other additions or deductions	9	21	(3)
Balance at end of period	616	625	526
Slow-Moving and Obsolete Inventory Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	8,877	8,462	9,066
Additions charged to costs and expenses	2,035	1,283	1,341
Deductions	(1,097)	(1,104)	(1,658)
Other additions or deductions	85	236	(287)
Balance at end of period	9,900	8,877	8,462
Accrued Product Warranty [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,309	928	1,076
Additions charged to costs and expenses	279	481	97
Deductions	(314)	(317)	(133)
Other additions or deductions	8	217	(112)
Balance at end of period	1,282	1,309	928
Foreign Net Operating Loss Tax Carryforwards [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,137	3,495	3,965
Additions charged to costs and expenses	1,176	153	568
Deductions	(1,473)	(499)	(761)
Other additions or deductions	72	(12)	(277)
Balance at end of period	$ 2,912	$ 3,137	$ 3,495