Preformed Line Products (PLPC) 10-K 9 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 05, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	PLPC
Entity Registrant Name	PREFORMED LINE PRODUCTS CO
Entity Central Index Key	80,035
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 Common Stock, Shares Outstanding		5,038,207
Entity Public Float			$ 114,826,787

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 44,358	$ 30,737
Accounts receivable, less allowances of $3,325 ($3,210 in 2016)	73,972	63,415
Inventories - net	77,886	74,484
Prepaids	3,434	3,353
Prepaid taxes	5,266	8,682
Other current assets	2,214	8,436
TOTAL CURRENT ASSETS	207,130	189,107
Property, plant and equipment - net	108,598	105,104
Intangibles - net	10,020	10,475
Goodwill	16,544	15,769
Deferred income taxes	7,774	10,208
Other assets	9,719	10,274
TOTAL ASSETS	359,785	340,937
LIABILITIES AND SHAREHOLDERS' EQUITY
Trade accounts payable	25,141	21,978
Notes payable to banks	864	1,315
Current portion of long-term debt	1,448	1,448
Accrued compensation and amounts withheld from employees	11,461	10,040
Accrued expenses and other liabilities	14,686	12,331
Accrued profit-sharing and other benefits	6,284	6,251
Dividends payable	1,046	1,037
Income taxes payable	1,903	1,055
TOTAL CURRENT LIABILITIES	62,833	55,455
Long-term debt, less current portion	34,598	42,943
Unfunded pension obligation	10,664	10,423
Deferred income taxes	2,090	2,078
Other noncurrent liabilities	11,063	6,495
Shareholders' equity:
Common shares - $2 par value per share, 15,000,000 shares authorized, 5,038,207 and 5,117,753 issued and outstanding, at December 31, 2017 and December 31, 2016, respectively	12,593	12,508
Common shares issued to rabbi trust, 289,026 and 297,281 shares at December 31, 2017 and December 31, 2016, respectively	(11,834)	(12,054)
Deferred compensation liability	11,834	12,054
Paid-in capital	29,734	24,629
Retained earnings	311,765	303,415
Treasury shares, at cost, 1,258,069 and 1,136,443 shares at December 31, 2017 and December 31, 2016, respectively	(68,115)	(59,640)
Accumulated other comprehensive loss	(47,440)	(57,369)
TOTAL SHAREHOLDERS' EQUITY	238,537	223,543
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 359,785	$ 340,937

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Accounts receivable, less allowances	$ 3,325	$ 3,210
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	5,038,207	5,117,753
Common stock, shares outstanding	5,038,207	5,117,753
Common stock, shares issued to rabbi trust	289,026	297,281
Treasury stock shares	1,258,069	1,136,443

Statements of Consolidated Inco

Statements of Consolidated Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 378,212	$ 336,634	$ 354,666
Cost of products sold	259,584	227,220	251,214
GROSS PROFIT	118,628	109,414	103,452
Costs and expenses
Selling	34,048	31,799	30,593
General and administrative	43,160	42,057	36,878
Research and engineering	14,327	14,025	14,879
Other operating expenses - net	985	54	8,753
Total costs and expenses	92,520	87,935	91,103
OPERATING INCOME	26,108	21,479	12,349
Other income (expense)
Interest income	430	291	391
Interest expense	(1,061)	(844)	(565)
Other income (expense)	329	27	(469)
Total other income (expense)	(302)	(526)	(643)
INCOME BEFORE INCOME TAXES	25,806	20,953	11,706
Income taxes	13,152	5,698	5,031
NET INCOME	$ 12,654	$ 15,255	$ 6,675
BASIC EARNINGS PER SHARE
Net income	$ 2.48	$ 2.95	$ 1.25
DILUTED EARNINGS PER SHARE
Net income	2.47	2.95	1.24
Cash dividends declared per share	$ 0.80	$ 0.80	$ 0.80
Weighted-average number of shares outstanding - basic	5,102	5,166	5,350
Weighted-average number of shares outstanding - diluted	5,133	5,178	5,366

Statements of Consolidated Comp

Statements of Consolidated Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Comprehensive Income Net Of Tax [Abstract]
Net income	$ 702	$ 6,278	$ 4,156	$ 1,518	$ 5,100	$ 4,742	$ 2,755	$ 2,658	$ 12,654	$ 15,255	$ 6,675
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									10,070	(3,579)	(19,789)
Recognized net actuarial loss									269	326	364
Gain (loss) on unfunded pension obligations									(410)	35	408
Other comprehensive income (loss), net of tax									9,929	(3,218)	(19,017)
Comprehensive income (loss)									$ 22,583	$ 12,037	$ (12,342)

Statements of Consolidated Cash

Statements of Consolidated Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES
Net income	$ 12,654	$ 15,255	$ 6,675
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	12,790	11,996	11,532
Provision for accounts receivable allowances	1,165	2,184	961
Provision for inventory reserves	1,205	2,736	2,477
Deferred income taxes	2,436	2,249	(944)
Share-based compensation expense	3,055	1,366	248
Loss (gain) on sale of property and equipment	160	(20)	363
Other - net	213	539	87
Changes in operating assets and liabilities (excluding impact of acquired assets):
Accounts receivable	(9,205)	(2,292)	(2,965)
Inventories	(2,208)	(6,354)	(2,297)
Trade accounts payables and accrued liabilities	4,732	3,279	5,652
Income taxes, net	7,134	(4,999)	(4,038)
Other - net	(301)	35	2,478
NET CASH PROVIDED BY OPERATING ACTIVITIES	33,830	25,974	20,229
INVESTING ACTIVITIES
Capital expenditures	(11,233)	(24,725)	(10,754)
Business acquisitions, net of cash acquired	0	0	0
Proceeds from the sale of property and equipment	142	70	929
Restricted cash and purchase of fixed-term deposits	9,191	(3,814)	(1,037)
NET CASH USED IN INVESTING ACTIVITIES	(1,900)	(28,469)	(10,862)
FINANCING ACTIVITIES
(Decrease) Increase in notes payable to banks	(537)	851	(775)
Proceeds from the issuance of long-term debt	55,581	70,274	51,942
Payments of long-term debt	(63,981)	(57,742)	(51,940)
Dividends paid	(4,099)	(4,170)	(4,391)
Excess tax benefits from share-based awards	0	(2)	(20)
Proceeds from issuance of common shares	1,962	248	80
Purchase of common shares for treasury	(2)	(3,108)	(6,003)
Purchase of common shares for treasury from related parties	(8,475)	(1,962)	(1,550)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(19,551)	4,389	(12,657)
Effects of exchange rate changes on cash and cash equivalents	1,242	(1,550)	4,040
Net increase in cash and cash equivalents	13,621	344	750
Cash and cash equivalents at beginning of year	30,737	30,393	29,643
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 44,358	$ 30,737	$ 30,393

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]
Beginning Balance at Dec. 31, 2014	$ 242,925	$ 12,433	$ (11,790)	$ 11,790	$ 22,795	$ 289,849	$ (47,018)	$ (28,127)	$ (7,007)
Net income	6,675					6,675
Foreign currency translation adjustment	(19,789)							(19,789)
Recognized net actuarial loss, net of tax provision of $219, $196 and $199 for 2015, 2016 and 2017 respectively	364								364
Gain on unfunded pension obligations, net of tax provision of $245, $21 and $247 for 2015, 2016 and 2017 respectively	408								408
Comprehensive income (loss)	(12,342)
Share-based compensation	295				248	47
Excess tax benefits from share-based awards	(20)				(20)
Purchase of 198,589, 118,430 and 121,626 common shares for 2015, 2016 and 2017 respectively	(7,552)						(7,552)
Issuance of 1,899, 10,332 and 36,221 common shares for 2015, 2016 and 2017 respectively	80	4			76
Restricted shares awards of 20,164, 4,799 and 5,859 for 2015, 2016 and 2017 respectively	0	41			(41)
Common shares issued to rabbi trust of 7,113 and 646 for 2015 and 2016 respectively, net	0		(262)	262
Cash dividends declared - $.80, $.80 and $.80 per share for 2015, 2016 and 2017 respectively	(4,402)				(142)	(4,260)
Ending Balance at Dec. 31, 2015	218,984	12,478	(12,052)	12,052	22,916	292,311	(54,570)	(47,916)	(6,235)
Net income	15,255					15,255
Foreign currency translation adjustment	(3,579)							(3,579)	0
Recognized net actuarial loss, net of tax provision of $219, $196 and $199 for 2015, 2016 and 2017 respectively	326							0	326
Gain on unfunded pension obligations, net of tax provision of $245, $21 and $247 for 2015, 2016 and 2017 respectively	35							0	35
Comprehensive income (loss)	12,037
Share-based compensation	1,339				1,366	(27)
Excess tax benefits from share-based awards	2				2
Purchase of 198,589, 118,430 and 121,626 common shares for 2015, 2016 and 2017 respectively	(5,070)						(5,070)
Issuance of 1,899, 10,332 and 36,221 common shares for 2015, 2016 and 2017 respectively	375	20			355
Restricted shares awards of 20,164, 4,799 and 5,859 for 2015, 2016 and 2017 respectively	0	10			(10)
Common shares issued to rabbi trust of 7,113 and 646 for 2015 and 2016 respectively, net	0		(2)	2
Cash dividends declared - $.80, $.80 and $.80 per share for 2015, 2016 and 2017 respectively	(4,124)					(4,124)
Ending Balance at Dec. 31, 2016	223,543	12,508	(12,054)	12,054	24,629	303,415	(59,640)	(51,495)	(5,874)
Net income	12,654					12,654
Foreign currency translation adjustment	10,070							10,070	0
Recognized net actuarial loss, net of tax provision of $219, $196 and $199 for 2015, 2016 and 2017 respectively	269							0	269
Gain on unfunded pension obligations, net of tax provision of $245, $21 and $247 for 2015, 2016 and 2017 respectively	(410)							0	(410)
Comprehensive income (loss)	22,583
Share-based compensation	2,824				3,055	(231)
Purchase of 198,589, 118,430 and 121,626 common shares for 2015, 2016 and 2017 respectively	(8,475)						(8,475)
Issuance of 1,899, 10,332 and 36,221 common shares for 2015, 2016 and 2017 respectively	2,135	73			2,062
Restricted shares awards of 20,164, 4,799 and 5,859 for 2015, 2016 and 2017 respectively	0	12			(12)
Common shares distributed from rabbi trust of 8,255, net	0		220	(220)
Cash dividends declared - $.80, $.80 and $.80 per share for 2015, 2016 and 2017 respectively	(4,073)					(4,073)
Ending Balance at Dec. 31, 2017	$ 238,537	$ 12,593	$ (11,834)	$ 11,834	$ 29,734	$ 311,765	$ (68,115)	$ (41,425)	$ (6,015)

Statements of Consolidated Sha8

Statements of Consolidated Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax provision (benefit) for recognized net actuarial loss	$ 199	$ 196
Tax provision	$ (247)	$ 21
Cash dividends declared per share	$ 0.80	$ 0.80	$ 0.80
Common Shares [Member]
Issuance of common shares	36,221	10,332	1,899
Restricted shares awards	5,859	4,799	20,164
Common Shares Issued to Rabbi Trust [Member]
Common shares issued to rabbi trust		646	7,113
Common shares distributed from rabbi trust	8,255
Deferred Compensation Liability [Member]
Common shares issued to rabbi trust		646	7,113
Common shares distributed from rabbi trust	8,255
Paid In Capital [Member]
Issuance of common shares	36,221	10,332	1,899
Restricted shares awards	5,859	4,799	20,164
Retained Earnings [Member]
Cash dividends declared per share	$ 0.80	$ 0.80	$ 0.80
Treasury Stock [Member]
Purchase of common shares	121,626	118,430	198,589
Unrecognized Pension Benefit Cost [Member]
Tax provision (benefit) for recognized net actuarial loss	$ 199	$ 196	$ 219
Tax provision	$ 247	$ 21	$ 245

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
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 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. Cash and Cash Equivalents Cash equivalents are stated at fair value and consist of highly liquid investments with original maturities of three months or less at the time of acquisition. Receivable Allowances The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The allowances for uncollectible accounts receivable is based upon the number of days the accounts are past due, the current business environment and specific information such as bankruptcy or liquidity issues of customers. 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 the lower of cost or market. 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 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, 2017, the fair value of the Company’s long-term debt was estimated using discounted cash flow 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 carrying value of the Company’s long-term debt approximates fair value at December 31, 2017. 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 discounted 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, 2017 and 2016. 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 using a projected cash flow basis method over their useful lives unless another method was demonstrated to be more appropriate. Customer relationships, technology and trademark intangibles acquired in 2014 and 2012 are amortized using a projected cash flow basis method over the period in which the economic benefits of the intangibles are consumed. Customer relationships, technology and trademarks acquired in July 2010 are being amortized using the straight-line method over their useful lives. This straight-line method was more appropriate because it better reflected 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 the annual impairment test for goodwill utilizing a combination of discounted cash flow methodology, market comparables, and an overall market capitalization reasonableness test in computing fair value by reporting unit. The Company compares the fair value of the reporting unit with its carrying value to assess if goodwill has been impaired. Based on the assumptions as to growth, discount rates and the weighting used for each respective valuation methodology, results of the valuations could be significantly changed. However, the Company believes that the methodologies 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, 2017 and 2016 and determined that no adjustment to the carrying value was required for the years ended December 31, 2017 and 2016. Revenue Recognition Sales are recognized when title passes to the customer either when goods are shipped or when they are delivered and based on the terms of the sale, there is persuasive evidence of an agreement, the price is fixed or determinable and collectability is reasonably assured. Revenue related to shipping and handling costs billed to customers is included in net sales and the related shipping and handling costs are included in cost of products sold. Research and Development Research and development costs for new products are expensed as incurred and totaled $2.1 million in 2017, $2.7 million in 2016 and $2.9 million in 2015. 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. Deferred tax liabilities and assets are recognized for the expected future tax consequences of events that have been reflected on the Consolidated Financial Statements. Deferred tax liabilities and assets are determined based on the differences between the book and tax basis of particular assets and liabilities and operating loss carryforwards using tax rates in effect for the years in which the differences are expected to reverse. Deferred tax assets are recognized to the extent that the Company believes these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. Uncertain tax positions are recorded in accordance with ASC 740 on the basis of a two-step process whereby (1) the Company determines whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. Advertising Advertising costs are expensed as incurred and totaled $1.7 million in 2017, $1.8 million in 2016 and $1.7 million in 2015. 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 gains and losses for the years ended December 31, 2017, 2016 and 2015 were a gain of $.3 million, a gain of $1.3 million and a loss of $7.4 million, respectively. Upon sale or substantially complete liquidation of an investment in a foreign entity, the cumulative translation adjustment for that entity is reclassified from Accumulated other comprehensive income (loss) to earnings. 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 The Company accounts for acquisitions in accordance with ASC 805 “Business Combinations.” Derivative Financial Instruments The Company does not hold derivatives for trading purposes. Recently Adopted Accounting Pronouncements In January 2017, the Financial Accounting Standards Board “FASB” issued Accounting Standards Update (“ASU”) 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Under the amendments in this Update, an entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This ASU is effective for an entity’s annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The early adoption of ASU 2017-04 had no impact on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 amends several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The Company adopted ASU 2016-09 effective January 1, 2017. ASU 2016-09 requires prospective recognition of excess tax benefits and deficiencies resulting from stock-based compensation awards vesting and exercises to be recognized as a discrete income tax adjustment in the income statement. Previously, these amounts were recognized in Paid in capital. The Company had $2 million excess tax benefit recorded during the year ended December 31, 2017. In addition, ASU 2016-09 requires excess tax benefits and deficiencies to be prospectively excluded from the assumed future proceeds in the calculation of diluted shares, resulting in an insignificant increase in diluted weighted average number of shares outstanding for the year ended December 31, 2017 and an immaterial impact on earnings per share. ASU 2016-09 requires that excess tax benefits from share-based compensation awards be reported as operating activities in the Statements of Consolidated Cash Flows. Previously, this activity was included in financing activities on the Statements of Consolidated Cash Flows. As permitted, the Company has elected to apply this change prospectively. ASU 2016-09 requires that employee taxes paid when an employer withholds shares for tax withholding purposes be reported as financing activities in the Statements of Consolidated Cash Flows on a retrospective basis. Previously, this activity was included in financing activities and, therefore, this resulted in no impact to the Statements of Consolidated Cash Flows. The Company has elected to account for forfeitures as they occur to estimate the number of stock-based awards expected to vest as permitted by ASU 2016-09. In July 2015, the FASB issued ASU-2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory”. The amendments in this Update more closely align the measurement of inventory in GAAP with the measurement of inventory in International Financial Reporting Standards (IFRS). The Company adopted ASU 2015-11 effective January 1, 2017. Under ASU 2015-11, an entity should measure inventory within the scope of this Update at the lower of cost and net realizable value. Net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Subsequent measurement is unchanged for inventory measured using LIFO or the retail inventory method. The amendments in this Update are effective for fiscal years beginning after December 15, 2016 including interim periods within those fiscal years. The amendments in this Update have been applied prospectively and did not have an effect on Company’s consolidated financial statements for the year ended December 31, 2017. New Accounting Standards To Be Adopted In March 2017, the FASB issued ASU 2017-07, “Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017. Early adoption is permitted for any entity in any interim or annual period. If an entity early adopts the amendment in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period as well as the nature and reason for the change in accounting principle. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” The amendments in this Update require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within the annual reporting period. Early adoption is permitted for any entity in any interim or annual period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” ASU 2016-16 modifies the recognition of income tax expense resulting from intra-entity transfers of assets other than inventory. Pursuant to this amendment, entities should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This amendment eliminates the exception for an intra-entity transfers of assets other than inventory. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within the annual reporting period. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The amendments in this Update require the recognition of assets and liabilities arising from lease transactions on the balance sheet and the disclosure of key information about leasing arrangements. Accordingly, a lessee will recognize a lease asset for its right to use the underlying asset and a lease liability for the corresponding lease obligation. Both the asset and liability will initially be measured at the present value of the future minimum lease payments over the lease term. Subsequent measurement, including the presentation of expenses and cash flows, will depend on the classification of the lease as either a finance or an operating lease. Initial costs directly attributable to negotiating and arranging the lease will be included in the asset. For leases with a term of 12 months or less, a lessee can make an accounting policy election by class of underlying asset to not recognize an asset and corresponding liability. Lessees will also be required to provide additional qualitative and quantitative disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. These disclosures are intended to supplement the amounts recorded in the financial statements and provide additional information about the nature of an organization’s leasing activities. The amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” or ASU 2014-09. ASU 2014-09 requires an entity to recognize revenue in a matter that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, the amendment provides five steps that an entity should apply when recognizing revenue. The amendment also specifies the accounting of some costs to obtain or fulfill a contract with a customer and expands the disclosure requirements around contracts with customers. An entity can either adopt this amendment retrospectively to each prior reporting period presented or retrospectively with cumulative effect of initially applying the update recognized at the date of initial application. In August 2015, the FASB issued ASU No. 2015-14 deferring the effective date of the amendment to annual reporting periods beginning after December 15, 2017, including interim periods therein. The Company developed and executed on an implementation plan to meet the January 1, 2018 adoption date. The Company established a cross-functional implementation team to analyze the impact of the standard on revenue contracts, which included scoping its revenue streams and reviewing contracts in order to compare historical accounting policies and practices to the new revenue standards. In addition, the Company implemented changes to processes and controls to meet the standard’s reporting and disclosure requirements. The Company adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective transition method applied to contracts that were not yet completed at that date. The adoption will not have a material impact on the Company’s consolidated financial statements, other than additional disclosures.

Other Financial Statement Infor

Other Financial Statement Information	12 Months Ended
	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Other Financial Statement Information	Note B - Other Financial Statement Information Inventories – net December 31 2017 2016 Raw materials $ 42,712 $ 37,535 Work-in-process 9,609 9,057 Finished products 33,780 35,629 86,101 82,221 Excess of current cost over LIFO cost (2,991 ) (2,784 ) Noncurrent portion of inventory (5,224 ) (4,953 ) $ 77,886 $ 74,484 Costs for inventories of certain material are determined using the LIFO method and totaled approximately $25.1 million and $28.6 million at December 31, 2017 and 2016, respectively. Property and equipment – net Major classes of property, plant and equipment are as follows: December 31 2017 2016 Land and improvements $ 13,141 $ 12,584 Buildings and improvements 75,941 72,662 Machinery, equipment and aircraft 166,999 158,078 Construction in progress 5,124 3,877 261,205 247,201 Less accumulated depreciation (152,607 ) (142,097 ) $ 108,598 $ 105,104 Depreciation of property and equipment was $11.8 million in 2017, $10.8 million in 2016 and $10.3 million in 2015. Machinery, equipment and aircraft includes $.2 million of capital leases at both years ended December 31, 2017 and 2016. Legal proceedings 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 million 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. However, the Company is unable to predict the outcome of this case and, if determined adversely to the Company, it could have a material effect on the Company’s financial results. From time to time, the Company may be subject to litigation incidental to its business. The Company is not a party to any other pending legal proceedings that the Company believes would, individually or in the aggregate, have a material adverse effect on its financial condition, results of operations or cash flows.

Pension Plans

Pension Plans	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Service cost $ 255 $ 203 $ 189 Interest cost 1,456 1,465 1,436 Expected return on plan assets (1,903 ) (1,824 ) (1,849 ) Recognized net actuarial loss 468 522 583 Net periodic pension cost $ 276 $ 366 $ 359 The following tables set forth benefit obligations, plan assets and the accrued benefit cost of the Plan at December 31: 2017 2016 Projected benefit obligation at beginning of the year $ 34,858 $ 34,763 Service cost 255 203 Interest cost 1,456 1,465 Actuarial (gain) loss 2,215 (516 ) Benefits paid (2,753 ) (1,057 ) Projected benefit obligation at end of year $ 36,031 $ 34,858 Fair value of plan assets at beginning of the year $ 24,435 $ 23,136 Actual return on plan assets 3,460 1,365 Employer contributions 225 991 Benefits paid (2,753 ) (1,057 ) Fair value of plan assets at end of the year $ 25,367 $ 24,435 Unfunded pension obligation $ 10,664 $ 10,423 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: 2017 2016 Balance at January 1 $ (5,855 ) $ (6,216 ) Reclassification adjustments: Pre-tax amortized net actuarial loss 468 522 Tax provision (199 ) (196 ) 269 326 Adjustment to recognize gain (loss) on unfunded pension obligations: Pre-tax (loss) gain (657 ) 56 Tax provision 247 (21 ) (410 ) 35 Balance at December 31 $ (5,997 ) $ (5,855 ) The pre-tax unfunded pension obligation loss of $.7 million included a loss of $2.8 million due to a .5% reduction in the discount rate to 3.75%, partially offset by a gain of $.3 million associated with the industry updates to the mortality table used, a gain of $.2 million due to demographic changes and a gain of $1.6 million resulting from asset performance in excess of the 8.0% rate of return assumption. The estimated net loss for the Plan that will be amortized from Accumulated other comprehensive income into periodic benefit cost for 2018 is $.2 million. 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: 2017 2016 Accumulated benefit obligation $ 36,030 $ 34,858 Fair market value of assets 25,367 24,435 2017 2016 Discount rate 3.75% 4.25% Rate of compensation increase n/a n/a Weighted-average assumptions used to determine net periodic benefit cost for the year ended December 31 are as follows: 2017 2016 2015 Discount rate 4.25% 4.25% 4.00% Rate of compensation increase n/a n/a n/a Expected long-term return on plan assets 8.00 8.00 8.00 The net periodic pension cost for 2017 was based on a long-term asset rate-of-return of 8.0%. 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. Using the Plan’s current mix of assets and based on the average historical returns and expected future returns for such mix, an expected long-term rate-of-return of 8.0% is justified. At December 31, 2017 and 2016, the fair value of the Plan assets included inputs in Level 1: Quoted market prices in active markets for identical assets or liabilities and Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. The fair value of the Plan assets as of December 31, 2017 and 2016, by category, are as follows: At December 31, 2017 Total Assets at Fair Value Quoted Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category Cash $ 453 $ 453 $ 0 $ 0 Equity Securities 16,667 16,667 0 0 U.S. Treasury Bonds 3,517 3,517 0 0 Corporate Bonds 4,730 0 4,730 0 Total $ 25,367 $ 20,637 $ 4,730 $ 0 At December 31, 2016 Total Assets at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category Cash $ 1,042 $ 1,042 $ 0 $ 0 Equity Securities 14,814 14,814 0 0 U.S. Treasury Bonds 3,893 3,893 0 0 Corporate Bonds 4,686 0 4,686 0 Total $ 24,435 $ 19,749 $ 4,686 $ 0 The Plan weighted-average asset allocations at December 31, 2017 and 2016, by asset category, are as follows: Plan assets at December 31 2017 2016 Asset category Equity securities 66 % 61 % Debt securities 32 35 Cash and equivalents 2 4 100 % 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 30-80% 60% Fixed Income 20-70% 40% Cash Equivalents 0-10% 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 expect to contribute to the Plan in 2018. 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 2018 $ 1,011 2019 1,091 2020 1,167 2021 1,251 2022 1,368 2023-2027 8,269 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 $5.1 million in 2017, $5.8 million in 2016 and $5.5 million in 2015. 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 return under this Supplemental Profit Sharing Plan is calculated at a weighted average of the one-year Treasury Bill rate plus 1%. At December 31, 2017 and 2016, the interest rate for the Supplemental Profit Sharing Plan was 2.76% and 1.65%, respectively. Expense for the Supplemental Profit Sharing Plan was $.5 million for 2017, $.5 million for 2016 and $.3 million for 2015. The Supplemental Profit Sharing Plan unfunded status as for each of the years ended December 31, 2017 and 2016 was $4.8 million and $4.3 million, respectively, and is included in Other noncurrent liabilities.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income ("AOCI")	12 Months Ended
	Dec. 31, 2017
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, 2017 Year Ended December 31, 2016 Cumulative Cumulative Unrecognized Translation Unrecognized Translation Benefit Cost Adjustment Total Benefit Cost Adjustment Total Balance at January 1 $ (5,874 ) $ (51,495 ) $ (57,369 ) $ (6,235 ) $ (47,916 ) $ (54,151 ) Other comprehensive income before reclassifications: Gain (loss) on foreign currency translation adjustment 0 10,070 10,070 0 (3,579 ) (3,579 ) Gain (loss) on unfunded pension obligations (410 ) 0 (410 ) 35 0 35 Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial loss (a) 269 0 269 326 0 326 Net current period other comprehensive income (loss) (141 ) 10,070 9,929 361 (3,579 ) (3,218 ) Balance at December 31 $ (6,014 ) $ (41,425 ) $ (47,440 ) $ (5,874 ) $ (51,495 ) $ (57,369 ) (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, 2017
Debt Disclosure [Abstract]
Debt and Credit Arrangements	Note E - Debt and Credit Arrangements December 31 2017 2016 Short-term debt Secured notes Thailand Bhat denominated at 3.95% 864 1,315 Current portion of long-term debt 1,448 1,448 Total short-term debt 2,312 2,763 Long-term debt USD denominated at 2.69%, due 2019 23,133 29,429 USD denominated at 2.71%, due 2026 12,433 13,881 Brazilian real denominated at 4.60% due 2022 286 0 Australian dollar denominated at 2.83%, due 2019 194 1,081 Total long-term debt 36,046 44,391 Less current portion (1,448 ) (1,448 ) Total long-term debt, less current portion 34,598 42,943 Total debt $ 36,910 $ 45,706 On June 27, 2016, the Company borrowed $14.5 million at a fixed rate of 2.71%, due July 1, 2026 to finance the purchase of a Company aircraft. The loan is secured by the purchased aircraft. In August 2016, the Company increased its borrowing capacity on its existing line of credit from $50 million to $65 million and extended the term to June 30, 2019. All other terms remained the same, including the interest rate of LIBOR plus 1.125%, unless its funded debt to Earnings before Interest, Taxes and Depreciation ratio exceeds 2.25 to 1, then the LIBOR spread becomes 1.500%. The PLP-USA line of credit provides for $5.0 million to be available to the Company’s subsidiaries. At December 31, 2017, the Company’s Australian subsidiary had borrowed $.3 million Australian dollars at a rate of 1.125% plus the Australian Bank Bill Swap Bid Rate with a term expiring June 30, 2019. At December 31, 2017, the interest rate on the Australian line of credit agreement was 2.83%. There was $41.5 million available at December 31, 2017 under the line of credit net of long-term outstanding letters of credit. The line of credit agreement contains, among other provisions, requirements for maintaining levels of net worth and profitability. At both December 31, 2017 and 2016, the Company was in compliance with all covenants. Aggregate maturities of long-term debt during the next five years are as follows: $1.4 million for 2018, $24.8 million for 2019, $1.5 million for 2020, $1.5 million for 2021 and $6.8 million thereafter. Interest paid was $1.0 million in 2017, $.7 million in 2016 and $.5 million in 2015. 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 nonperformance. As of December 31, 2017, the Company had total outstanding guarantees of $5.4 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, 2017, the Company had total outstanding letters of credit of $.8 million.

Leases

Leases	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Leases	Note F - Leases The Company has commitments under operating leases primarily for office and manufacturing space, transportation equipment, office equipment and computer equipment. Rental expense was $2.6 million in 2017, $2.1 million in 2016 and $3.4 million in 2015. Future minimum rental commitments having non-cancelable terms exceeding one year are $2.0 million in 2018, $1.8 million in 2019, $1.5 million in 2020, $1.3 million in both 2021 and 2022, and an aggregate $7.2 million thereafter. The total minimum sublease rentals to be received through 2023 under noncancelable subleases as of December 31, 2017 was $4.3 million. The Company has commitments under capital leases for equipment and vehicles. Amounts recognized as capital lease obligations are reported in Accrued expense and other liabilities and Other noncurrent liabilities in the Consolidated Balance Sheets. Future minimum rental commitments for capital leases are less than $.1 million for each of the years ended December 31, 2018, 2019, 2020 and 2021 and the related imputed interest for the capital leases in each of these years is less than $.1 million. Future minimum rental commitment and imputed interest for capital leases in 2022 is $0. Leased property and equipment under capital leases are amortized using the straight-line method over the term of the lease. Routine maintenance, repairs and replacements are expensed as incurred.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note G - Income Taxes The company recorded net tax provisions of $13.2 million, $5.7 million, and $5.0 million for the years ending December 31, 2017, 2016, and 2015, respectively. Cash taxes paid net of refunds were $3.4 million in 2017, $6.9 million in 2016 and $12.3 million in 2015. As described in Note A, effective January 1, 2017, the Company adopted the new guidance from ASU 2016-09 and has recorded excess tax benefits or tax deficiencies from stock-based compensation in the Statements of Consolidated Income within the provision for income taxes rather than in the Consolidated Balance Sheets within paid-in capital. The Company had $.2 million in excess tax benefits during the year ended December 31, 2017. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code that affected 2017, including, but not limited to, requiring a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries that is payable over eight years. The Tax Act also establishes new tax laws that will affect 2018, including but not limited to, (1) reduction of the U.S. federal statutory rate from 35% to 21%; (2) the creation of the base erosion anti-abuse tax (BEAT), a new minimum tax; (3) a general elimination of U.S. federal income taxes on dividends from foreign subsidiaries; (4) a new provision, Global Intangible Low-Taxed Income (GILTI), which ends deferral of taxation on a significant portion of foreign earnings; (5) a new limitation on deductible interest expense; (6) the repeal of the domestic production activity deduction; (7) limitations on the deductibility of certain executive compensation; and (8) limitations on the use of FTCs to reduce the U.S. income tax liability. The SEC staff issued Standard Accounting Bulletin (“SAB”) 118, which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the accounting under ASC 740. In accordance with SAB 118, a company must reflect the income tax effects of those aspects of the Tax Act for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the Tax Act is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate to be included in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the Tax Act. Our accounting for the following elements of the Tax Act is incomplete. However, the Company was able to make reasonable estimates of certain effects and, therefore, recorded provisional adjustments as follows: 1. The Tax Act reduces the corporate tax rate from 35% to 21%, effective January 1, 2018. For certain of its deferred tax assets and deferred tax liabilities, the Company has recorded a provisional decrease of $6.1 million and $2.9 million, respectively, with a corresponding net adjustment to deferred income tax expense of $3.2 million for the year ended December 31, 2017. While the Company was able to make a reasonable estimate of the impact of the reduction in the corporate rate, it may be affected by other analyses related to the Tax Act, including but not limited to, its calculation of deemed repatriation of deferred foreign income and the state tax effect of adjustments made to federal temporary differences. 2. The Deemed Repatriation Transition Tax (Transition Tax) is a tax on previously untaxed accumulated and current earnings and profits (E&P) of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. The Company was able to make a reasonable estimate of the Transition Tax and recorded a provisional Transition Tax expense of $3.8 million, of which $2.6 million affects the tax rate. However, the Company is continuing to gather additional information to more precisely compute the amount of the Transition Tax. Our accounting for the following elements of the Tax Act is incomplete, and no provisional amounts have been recorded with regard to the following: 1. The Company has not made sufficient progress on the effects of the 2018 limitations on the deductibility of certain executive compensation on its related deferred tax balances. The Company continues to apply ASC 740 based on the provisions of the tax laws that were in effect immediately prior to the Tax Act being enacted. 2. The Tax Act subjects a US shareholder to tax on global intangible low taxed income (GILTI) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income states that an entity can make an accounting policy election to either recognize deferred taxes on temporary basis differences expected to reverse as GILTI in the future years or provide for the tax expense related to GILTI in the year the tax is incurred. Given the complexity of the GILTI provisions, the Company is still evaluating the effects of the GILTI provisions and has not yet determined its accounting policy. At December 31, 2017, because the Company is still evaluating the GILTI provisions and its analysis of the future taxable income that is subject to GILTI, the Company is unable to make a reasonable estimate and has not reflected any adjustments related to GILTI in its financial statements. 3. Since the Company has not yet completed all the computations necessary or completed an inventory of our 2017 expenditures that qualify for immediate expensing, the Company has not recorded a provisional benefit. Income before income taxes was derived from the following sources: 2017 2016 2015 United States $ 4,774 $ 3,501 $ 4,421 Foreign 21,032 17,452 7,285 $ 25,806 $ 20,953 $ 11,706 The components of income taxes for the year ended December 31 are as follows: 2017 2016 2015 Current Federal $ 4,592 $ (1,698 ) $ 2,679 Foreign 5,998 5,115 2,951 State and local 126 32 345 10,716 3,449 5,975 Deferred Federal 2,316 2,986 (611 ) Foreign 12 (914 ) (309 ) State and local 108 177 (24 ) 2,436 2,249 (944 ) Income taxes $ 13,152 $ 5,698 $ 5,031 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 year ended December 31 are summarized as follows: 2017 2016 2015 U. S. federal statutory tax rate 35% 35% 35% Federal tax at statutory rate $ 9,033 $ 7,334 $ 4,097 State and local taxes, net of federal benefit 82 20 89 U.S. federal permanent items (60 ) 400 251 Domestic production activities deduction (116 ) 0 (321 ) Foreign earnings and related tax credits 0 716 700 Tax act - transition tax 2,592 0 0 Non-U.S. tax rate variances (1,491 ) (1,484 ) (685 ) Unrecognized tax benefits 0 (195 ) (768 ) Valuation allowance 88 (414 ) 1,754 Tax credits (255 ) (252 ) (212 ) Tax Act - remeasurement of deferreds 3,161 0 0 Other, net 118 (427 ) 126 $ 13,152 $ 5,698 $ 5,031 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: 2017 2016 Deferred tax assets: Accrued compensation and benefits $ 1,093 $ 1,250 Inventory valuation reserves 2,332 3,422 Allowance for doubtful accounts 360 471 Benefit plan reserves 7,981 11,130 Net operating loss carryforwards 3,402 3,358 Other accrued expenses 2,489 2,445 Unrealized foreign exchange 1,462 2,812 Gross deferred tax assets 19,119 24,888 Valuation allowance (3,965 ) (3,805 ) Net deferred tax assets 15,154 21,083 Deferred tax liabilities: Depreciation and other basis differences (6,313 ) (8,341 ) Intangibles (2,706 ) (2,887 ) Undistributed foreign earnings (426 ) (1,642 ) Other (25 ) (83 ) Deferred tax liabilities (9,470 ) (12,953 ) Net deferred tax assets $ 5,684 $ 8,130 2017 2016 Change in net deferred tax assets: Deferred income tax expense Ordinary movement $ (473 ) $ (2,249 ) Tax act - transition tax 1,198 0 Tax impact deferred rate (3,161 ) 0 Items of other comprehensive income (loss) 48 (48 ) Currency translation (58 ) 191 Total change in net deferred tax assets $ (2,446 ) $ (2,106 ) 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, 2017, the Company had $11.3 million of foreign net operating loss carryforwards of which $10.0 million have an indefinite carryforward and $1.0 million will expire between the years 2024 and 2027. 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 $4.0 million at December 31, 2017 in order to measure only the portion of the deferred tax asset that is more likely than not to be realized. The net increase in the valuation allowance during the year was $.2 million, all of which impacts the income tax provision. The Company previously considered 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. Since the Tax Act includes a mandatory one-time tax on certain accumulated earnings of foreign subsidiaries, these previously unremitted earnings for which no U.S. deferred tax liability had been accrued have now been subject to U.S. tax. Notwithstanding the U.S. taxation of these amounts, the Company intends to continue to invest most or all of these earnings, as well as our capital in these subsidiaries, indefinitely outside of the U.S. and do not expect to incur any significant, additional taxes related to such amounts. The Company is subject to taxation in the U.S. and various state and foreign jurisdictions. As of December 31, 2017, with few exceptions, the Company is no longer subject to U.S. federal examinations by tax authorities for years before 2014 and state, local or foreign examinations by tax authorities for years before 2011. The following is a tabular reconciliation of the total amounts of unrecognized tax benefits, excluding interest and penalties, for the year ended December 31: 2017 2016 2015 Balance at January 1 $ 0 $ 178 $ 794 Additions for tax positions of prior years 0 0 0 Reductions for tax positions of prior years 0 0 (616 ) Expiration of statutes of limitations 0 (178 ) 0 Balance at December 31 $ 0 $ 0 $ 178 The Company records accrued interest as well as penalties related to unrecognized tax benefits as part of the provision for income taxes. The Company recognized less than $.1 million, net of the amount reversed due to expiring statutes, during each of the years ended December 31, 2017, 2016 and 2015. During the year ended December 31, 2017, the Company had no activity with regard to unrecognized tax. The Company had approximately $0, $0, and less than $.1 million accrued for the payment of interest for the years ended December 31, 2017, 2016 and 2015, respectively. The Company had approximately $0 accrued for the payment of penalties for each of the years ended December 31, 2017, 2016 and 2015, respectively. If recognized, approximately $0, $0 and $.2 million of unrecognized tax benefits would affect the tax rate for the year ended December 31, 2017, 2016 and 2015, respectively. The Company does not anticipate a change in the unrecognized tax benefits within the next twelve months.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	Note H – Share-Based Compensation The 1999 Stock Option Plan Activity in the Company’s 1999 Stock Option Plan for the year ended December 31, 2017 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, 2017 5,550 $ 48.35 Exercised (4,800 ) $ 49.79 Forfeited 0 $ 0.00 Outstanding (exercisable and vested) at December 31, 2017 750 $ 39.10 1.8 $ 24 There were 4,800, 6,450 and 0 in stock options exercised during the years ended December 31, 2017, 2016 and 2015, respectively. The total intrinsic value of stock options exercised during each of the years ended December 31, 2017, 2016 and 2015 was approximately $.1 million. Cash received for the exercise of stock options during both 2017 and 2016 was $.2 million. The Company recorded no compensation expense related to these stock options for the years ended December 31, 2017, 2016 and 2015, as all options were fully vested as of December 31, 2012. 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, 2017, 5,000 options and 90,807 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 in cash. A summary of the RSUs for the year ended December 31, 2017 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, 2017 130,168 15,974 146,142 $ 38.46 Granted 80,247 10,560 90,807 54.60 Vested 0 (5,859 ) (5,859 ) 45.85 Forfeited (9,843 ) (2,461 ) (12,304 ) 46.86 Nonvested as of December 31, 2017 200,572 18,214 218,786 $ 52.68 For time-based RSUs, the Company recognizes stock-based compensation expense on a straight-line basis over the requisite service period of the award in General and administrative expense in the accompanying Statements of Consolidated Income. Compensation expense related to the time-based RSUs for the years ended December 31, 2017, 2016 and 2015 was $.4 million, $.3 million and $.3 million annually for each year. As of December 31, 2017, there was $.4 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 1.8 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 criterions 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, 2017 and 2016 was $2.7 million and $.9 million, respectively, compared to a reduction of compensation expense of $1.0 million for the year ended December 31, 2015. The reduction of performance-based compensation expense during 2015 reflected a reduction in performance-based compensation expense on the 2013 and 2014 performance-based RSU grants due to lower results for growth in pre-tax income and sales. The performance and time-based RSUs forfeited in 2017 are those from the 2015 and 2016 grants due to the retirement of the Company’s Chief Financial Officer in May 2017 along with the portion of the 2015 grant for which pre-tax income and sales growth performance were not achieved. The Company forfeited 47,832 RSUs granted during 2013 upon vesting of the remaining portion of such awards at December 31, 2015. The Company forfeited 40,676 RSUs granted during 2014 upon vesting of the remaining portion of such awards at December 31, 2016. As of December 31, 2017, the remaining performance-based RSUs compensation expense of $3.7 million is expected to be recognized over a period of approximately 1.8 years. In November 2015, a special, one-time grant of restricted stock was awarded to the CEO and other officers that fully vested on the issuance date of November 30, 2015, as a shorter-term reward for achievements not tied to the performance metrics. Compensation expense recorded for the restricted stock was $.6 million. The excess tax benefits from service and performance-based RSUs for the year ended December 31, 2017 was $.2 million and less than $.1 million for each of the years ended December 31, 2016 and 2015. 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, 2017, 289,026 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 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 5,000, 0 and 10,500 options granted for the years ended December 31, 2017, 2016 and 2015, respectively. 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: 2017 2016 2015 Risk-free interest rate 2.0 % N/A 2.1 % Dividend yield 1.7 % N/A 1.6 % Expected life (years) 5 N/A 5 Expected volatility 36.8 % N/A 37.9 % Activity in the Company’s LTIP for the year ended December 31, 2017 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, 2017 52,750 $ 54.54 Granted 5,000 $ 48.00 Exercised (28,500 ) $ 46.90 Forfeited 0 $ 0.00 Outstanding (vested and expected to vest) at December 31, 2017 29,250 $ 56.84 7.1 $ 423 Exercisable at December 31, 2017 21,625 $ 60.69 6.5 $ 231 The weighted-average grant-date fair value of options granted during 2017 was $48.00. There were 28,500, 500, and 0 stock options exercised during the years ended December 31, 2017, 2016 and 2015, respectively. The total intrinsic value of stock options exercised was $.7 million and $0 for the years ended December 31, 2017 and 2016, respectively. Cash received for the exercise of stock options during 2017 was $1.5 million and less than $.1 million in 2016. For the years ended December 31, 2017, 2016 and 2015, the Company recorded compensation expense related to the stock options currently vested of $.1 million, $.2 million and $.3 million, respectively. The total compensation cost related to nonvested awards not yet recognized at December 31, 2017 is expected to be $.1 million over a weighted-average period of approximately 1.9 years . The excess tax benefits from share-based awards for each of the years ended December 31, 2017, 2016 and 2015 was less than $.1 million. 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 options exercised in the current period.

Computation of Earnings Per Sha

Computation of Earnings Per Share	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Numerator Net income $ 12,654 $ 15,255 $ 6,675 Denominator Determination of shares (in thousands) Weighted-average common shares outstanding 5,102 5,166 5,350 Dilutive effect - share-based awards 31 12 16 Diluted weighted-average common shares outstanding 5,133 5,178 5,366 Earnings per common share Basic $ 2.48 $ 2.95 $ 1.25 Diluted $ 2.47 $ 2.95 $ 1.24 For the year ended December 31, 2017, 2016 and 2015, 13,000, 56,850 and 58,350 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, 2016
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, 2017 December 31, 2016 Gross Accumulated Gross Carrying Accumulated Amount Amortization Amount Amortization Finite-lived intangible assets Patents $ 4,806 $ (4,791 ) $ 4,816 $ (4,799 ) Land use rights 1,199 (201 ) 1,070 (180 ) Trademark 1,770 (1,166 ) 1,725 (1,039 ) Technology 3,149 (1,215 ) 3,057 (1,031 ) Customer relationships 12,350 (5,881 ) 12,073 (5,217 ) $ 23,274 $ (13,254 ) $ 22,741 $ (12,266 ) Indefinite-lived intangible assets Goodwill $ 16,544 $ 15,769 The Company performs its annual impairment test for goodwill utilizing a combination of discounted cash flow methodology, market comparables and an overall market capitalization reasonableness test in computing fair value by reporting unit. The Company then compares the fair value of the reporting unit with its carrying value to assess if goodwill has been impaired. Based on the assumptions as to growth, discount rates and the weighting used for each respective valuation methodology, results of the valuations could be significantly different. The Company believes that the methodologies 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, 2017 and October 1, 2016 and determined that no adjustment to the carrying value was required. USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2016 $ 3,078 $ 3,918 $ 1,301 $ 7,524 $ 15,821 Currency translation and other 0 99 (14 ) (137 ) (52 ) Balance at December 31, 2016 3,078 4,017 1,287 7,387 15,769 Currency translation 0 275 208 292 775 Balance at December 31, 2017 $ 3,078 $ 4,292 $ 1,495 $ 7,679 $ 16,544 The Company’s only intangible asset with an indefinite life is goodwill. The Company’s goodwill is not deductible for tax purposes. The aggregate amortization expense for other intangibles with finite lives, ranging from 4 to 82 years, for the year ended December 31, 2017, 2016 and 2015 was $1.0 million, $1.0 million and $1.2 million, respectively .

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities	Note K – Fair Value of Financial Assets and Liabilities The carrying value of the Company’s current financial instruments, which include cash and cash equivalents, accounts receivable, accounts payable, notes payable and short-term debt, approximates its fair value because of the short-term maturity of these instruments. At December 31, 2017, 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. There have been no transfers in or out of Level 2 for the year ended December 31, 2017. Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt are as follows: December 31, 2017 December 31, 2016 Fair Carrying Value Fair Value Carrying Value Long-term debt and related current maturities $ 35,369 $ 36,046 $ 43,209 $ 44,391

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	Note L – 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. It is not practical to present revenue by product line. U.S. net sales for the year ended December 31, 2017, 2016, and 2015 were $147.6 million, $135.3 million and $142.5 million, respectively. U.S. long-lived assets as of December 31, 2017 and 2016 were $53.2 million and $54.0 million, respectively. The following table presents a summary of the Company’s reportable segments for the year ended December 31, 2017, 2016 and 2015. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profits in inventory. Year Ended December 31 2017 2016 2015 Net sales PLP-USA $ 147,646 $ 135,260 $ 142,470 The Americas 69,764 60,049 59,290 EMEA 63,916 56,411 53,778 Asia-Pacific 96,886 84,914 99,128 Total net sales $ 378,212 $ 336,634 $ 354,666 Intersegment sales PLP-USA $ 12,234 $ 9,471 $ 9,339 The Americas 5,570 5,132 5,074 EMEA 1,120 1,363 1,652 Asia-Pacific 8,596 7,827 8,364 Total intersegment sales $ 27,520 $ 23,793 $ 24,429 Interest income PLP-USA $ 0 $ 0 $ 0 The Americas 283 79 145 EMEA 47 116 123 Asia-Pacific 100 96 123 Total interest income $ 430 $ 291 $ 391 Interest expense PLP-USA $ (941 ) $ (738 ) $ (440 ) The Americas (10 ) (14 ) (56 ) EMEA (31 ) (13 ) (23 ) Asia-Pacific (79 ) (79 ) (46 ) Total interest expense $ (1,061 ) $ (844 ) $ (565 ) Income taxes PLP-USA $ 7,142 $ 1,494 $ 2,387 The Americas 3,593 2,507 1,399 EMEA 1,583 1,862 1,646 Asia-Pacific 834 (165 ) (401 ) Total income taxes $ 13,152 $ 5,698 $ 5,031 Net income (loss) PLP-USA $ (2,367 ) $ 2,007 $ 2,031 The Americas 8,169 5,881 3,178 EMEA 4,088 6,243 4,881 Asia-Pacific 2,764 1,124 (3,415 ) Total net income $ 12,654 $ 15,255 $ 6,675 Year Ended December 31 2017 2016 2015 Expenditure for long-lived assets PLP-USA $ 4,474 $ 18,314 $ 5,164 The Americas 1,272 2,634 2,074 EMEA 2,329 1,450 1,673 Asia-Pacific 3,158 2,327 1,843 Total expenditures for long-lived assets $ 11,233 $ 24,725 $ 10,754 Depreciation and amortization PLP-USA $ 5,389 $ 4,937 $ 4,551 The Americas 1,985 1,874 1,862 EMEA 1,678 1,402 1,464 Asia-Pacific 3,738 3,783 3,655 Total depreciation and amortization $ 12,790 $ 11,996 $ 11,532 As of December 31 2017 2016 Identifiable assets PLP-USA $ 116,484 $ 122,326 The Americas 70,720 63,643 EMEA 62,524 54,493 Asia-Pacific 110,057 100,475 Total identifiable assets $ 359,785 $ 340,937 Long-lived assets PLP-USA $ 53,211 $ 54,048 The Americas 16,365 16,158 EMEA 12,971 10,619 Asia-Pacific 26,051 24,279 Total long-lived assets $ 108,598 $ 105,104

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Note M - Related Party Transactions On January 3, 2017, the Company purchased 1,834 shares of the Company from Officers at a price per share of $58.58, 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 these transactions. On May 9, 2017, the Company purchased 2,500 shares of the Company from an Officer at a price per share of $52.05, 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 16, 2017, the Company purchased 24,920 shares of the Company from a trust for the benefit of Barbara P. Ruhlman at a price per share of $50.16, which was calculated from a 30-day average of market price. Barbara P. Ruhlman is Director Emeritus On November 8, 2017, the Company purchased 24,874 shares of the Company from Officers and other employees, at a price per share of $71.07, which was calculated from a 30-day average market price. Additionally, on November 8, 2017, the Company purchased 7,000 shares of the Company from Robert G. Ruhlman, at a price per share of $71.07, which was calculated from a 30-day average market price. Mr. Ruhlman is Chairman, President and Chief Executive Officer (CEO) of the Company, son of Barbara P. Ruhlman, Director Emeritus On November 17, 2017, the Company purchased 7,975 shares of the Company from Officers and other employees, at a price per share of $74.51, which was calculated from a 30-day average market price. The Audit Committee of the Board of Directors approved these transactions. On November 30, 2017, the Company purchased 3,334 shares of the Company from a retired Officer of the Company, at a price per share of $75.37, which was calculated from a 30-day average market price. The Audit Committee of the Board of Directors approved this transaction. On December 13, 2017, the Company purchased 21,650 shares of the Company from Officers and other employees, at a price per share of $78.68, which was calculated from a 30-day average market price. Additionally, on December 13, 2017, the Company purchased 7,500 shares of the Company from Randall M. Ruhlman at a price per share of $78.68, which was calculated from a 30-day average market price. Mr. Ruhlman is the son of Barbara P. Ruhlman, Director Emeritus On December 13, 2017, the Company purchased 15,000 shares of the Company from a trust for the benefit of Barbara P. Ruhlman, Director Emeritus In 2016, the Company purchased 7,703 common shares of the Company from Officers and other employees, at a price per share ranging between $42.10 and $45.20, which was calculated from a 30-day average of market price. The Audit Committee of the Board of Directors approved these transactions. On August 23, 2016, the Company purchased 27,448 shares of the Company from a trust for the benefit of Barbara P. Ruhlman and a foundation of which Barbara P. Ruhlman, Robert G. Ruhlman and Bernard Karr are officers, at a price per share of $44.66 which was calculated from a 30-day average of market price. The purchase was consummated pursuant to Share Purchase Agreements both dated August 23, 2016, between the Company and the foundation, and the Company and the trust. The Audit Committee of the Board of Directors approved these transactions. On December 29, 2016, the Company purchased 5,000 shares from Robert G. Ruhlman, at a price per share of $56.38, which was calculated from a 30-day average of market price. The Audit Committee of the Board of Directors approved this transaction. On March 26, 2015, the Company purchased 1,290 shares of the Company from Robert G. Ruhlman, at a price per share of $45.39, which was calculated from a 30-day average of market price. On November 30, 2015, the Company purchased 1,479 common shares of the Company from Robert G. Ruhlman, at a price per share of $41.50, which was calculated from a 30-day average of market price. Additionally, on December 8, 2015, the Company purchased 1,510 common shares of the Company from Robert G. Ruhlman, at a price per share of $40.83, which was calculated from a 30-day average of market price. The Audit Committee of the Board of Directors approved these transactions. On August 11, 2015, the Company purchased 30,713 shares of the Company from a trust for the benefit of Barbara P. Ruhlman and a foundation of which Barbara P. Ruhlman, Robert G. Ruhlman and Bernard Karr are officers, at a price per share of $35.00 which was calculated from a 30-day average of market price. The purchase was consummated pursuant to Share Purchase Agreements both dated August 11, 2015, between the Company and the foundation, and the Company and the trust. The Audit Committee of the Board of Directors approved this transaction. J. Ryan Ruhlman has worked for the Company for over twelve years, was elected to the Company’s Board of Directors in July 2015 and as Vice President-Marketing and Business Development in December 2015. He received $189,870 in reportable compensation for 2015 of which $33,725 is attributable to his 2015 award of stock options. The amounts are in line with the Company’s compensation for mid-level managers. The Company’s Australian subsidiary utilizes copper extrusion services from Cast Alloy. For the years ended December 31, 2017, 2016 and 2015, PLP-Australia incurred a total of $.2 million, $.2 million and $.1 million for these expenses, respectively. 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 New Zealand subsidiary, Electropar currently leases one parcel of property, on which it has its corporate office, manufacturing and warehouse space. The entities leasing the property to Electropar are owned, in part, by Grant Wallace, a former Director. For the year ended December 31, 2017, Electropar incurred less than $.1 million for such lease expense. For the years ended December 31, 2016 and 2015, Electropar leased two parcels of property which were owned, in part, by Grant Wallace, a former Director, and incurred a total of $.3 million annually for such lease expense. The Audit Committee of the Board of Directors approved these transactions. The Company’s Belos operation hires temporary employees through a temporary work agency, Flex-Work Sp. Z.o.o., which is 50% owned by Agnieszka Rozwadowska. Agnieszka Rozwadowska is the wife of Piotr Rozwadowska, the Managing Director of the Belos operation located in Poland. For the years ended December 31, 2017, 2016 and 2015, Belos incurred a total of $.2 million, $.4 million and $.4 million, respectively, for such temporary labor expense. The Audit Committee of the Board of Directors approved these transactions. During 2017, the Company paid approximately $.1 million in legal fees to Baker & Hostetler LLP, of which R. Steven Kestner is the Chairman and the chair of its policy committee. Mr. Kestner is a Director of the Company.

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Business Combinations	Note N -Business Combinations None.

Product Warranty Reserve

Product Warranty Reserve	12 Months Ended
	Dec. 31, 2017
Guarantees [Abstract]
Product Warranty Reserve	Note O – Product Warranty Reserve The Company records an accrual for estimated warranty costs to Costs of products sold in the Consolidated Statements of 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: 2017 2016 2015 Balance at January 1 $ 1,058 $ 714 $ 892 Additions charged to costs and expenses 347 649 74 Warranty usage (399 ) (269 ) (158 ) Currency translation 70 (36 ) (94 ) Balance at December 31 $ 1,076 $ 1,058 $ 714

Quarterly Financial Information

Quarterly Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (unaudited)	Note P - Quarterly Financial Information (unaudited) The following table summarizes the Company’s results of operations for each of the quarters in 2017 and 2016: Quarter ended March 31 June 30 September 30 December 31 2017 Net sales $ 84,569 $ 97,512 $ 99,239 $ 96,892 Gross profit 24,665 29,673 33,535 30,755 Income before income taxes 2,118 6,258 9,739 7,691 Net income 1,518 4,156 6,278 702 Net income, basic $ 0.30 $ 0.81 $ 1.23 $ 0.14 Net income, diluted $ 0.30 $ 0.81 $ 1.23 $ 0.14 2016 Net sales $ 78,682 $ 83,220 $ 88,299 $ 86,433 Gross profit 24,289 26,806 28,855 29,464 Income before income taxes 3,656 3,773 6,534 6,990 Net income 2,658 2,755 4,742 5,100 Net income, basic $ 0.51 $ 0.53 $ 0.92 $ 1.00 Net income, diluted $ 0.51 $ 0.53 $ 0.92 $ 0.99

Charges Related to Restructurin

Charges Related to Restructuring Activities	12 Months Ended
	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Charges Related to Restructuring Activities	Note Q – Charges related to restructuring activities During the year ended December 31, 2015, the Company reconfigured one of its operations within its Asia Pacific segment by reducing its workforce and manufacturing facilities while outsourcing production predominantly to its locations with lower cost operations. This was done in response to a slowdown in economic activity in the region as well as continued downward market pressure on prices. Additionally, the Company initiated a reconfiguration in the PLP-USA segment, which was primarily a reduction in personnel and facilities in response to downward market pressure on prices. Both of these actions reduced infrastructure and manufacturing costs. There was less than $.1 million and $.1 million of expense recognized in the twelve months ended December 31, 2017 and 2016, respectively. The restructuring liability related to lease termination costs at December 31, 2017 of $.4 million was recorded in Accrued expenses. A summary by reporting segment of the accruals recorded as a result of the restructuring is as follows: Severance Lease Termination Costs Asset Disposals Other Total December 31, 2016 Balance $ 0 $ 478 $ 0 $ 0 $ 478 Charges 0 0 0 0 0 Payments and other adjustments 0 (63 ) 0 24 (39 ) December 31, 2017 Balance $ 0 $ 415 $ 0 $ 24 $ 439

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2016
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	PREFORMED LINE PRODUCTS COMPANY SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS Year Ended December 31, 2017, 2016 and 2015 (Thousands of dollars) For the year ended December 31, 2017: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions (a) Balance at end of period Allowance for doubtful accounts $ 2,815 $ 472 $ (432 ) $ 55 $ 2,910 Reserve for credit memos 395 693 (675 ) 2 415 Slow-moving and obsolete inventory reserves 11,560 998 (3,855 ) 363 9,066 Accrued product warranty 1,058 347 (399 ) 70 1,076 Foreign net operating loss tax carryforwards 3,805 490 (312 ) (18 ) 3,965 For the year ended December 31, 2016: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions (a) Balance at end of period Allowance for doubtful accounts $ 1,871 $ 1,809 $ (864 ) $ (1 ) $ 2,815 Reserve for credit memos 455 (674 ) 613 1 395 Slow-moving and obsolete inventory reserves 10,230 2,825 (1,408 ) (87 ) 11,560 Accrued product warranty 714 649 (269 ) (36 ) 1,058 Foreign net operating loss tax carryforwards 5,209 346 (1,175 ) (575 ) 3,805 For the year ended December 31, 2015: Balance at beginning of period Additions charged to costs and expenses Deductions Other additions or deductions (a) Balance at end of period Allowance for doubtful accounts $ 1,943 $ 524 $ (414 ) $ (182 ) $ 1,871 Reserve for credit memos 428 437 (408 ) (2 ) 455 Slow-moving and obsolete inventory reserves 9,183 2,477 (1,509 ) 79 10,230 Accrued product warranty 892 74 (158 ) (94 ) 714 Foreign net operating loss tax carryforwards 3,614 2,105 (287 ) (223 ) 5,209

Significant Accounting Polici27

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
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	Principles of Consolidation 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.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents are stated at fair value and consist of highly liquid investments with original maturities of three months or less at the time of acquisition.
Receivable Allowances	Receivable Allowances The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The allowances for uncollectible accounts receivable is based upon the number of days the accounts are past due, the current business environment and specific information such as bankruptcy or liquidity issues of customers. 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 the lower of cost or market. 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 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, 2017, the fair value of the Company’s long-term debt was estimated using discounted cash flow 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 carrying value of the Company’s long-term debt approximates fair value at December 31, 2017.
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 discounted 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, 2017 and 2016.
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 using a projected cash flow basis method over their useful lives unless another method was demonstrated to be more appropriate. Customer relationships, technology and trademark intangibles acquired in 2014 and 2012 are amortized using a projected cash flow basis method over the period in which the economic benefits of the intangibles are consumed. Customer relationships, technology and trademarks acquired in July 2010 are being amortized using the straight-line method over their useful lives. This straight-line method was more appropriate because it better reflected 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 the annual impairment test for goodwill utilizing a combination of discounted cash flow methodology, market comparables, and an overall market capitalization reasonableness test in computing fair value by reporting unit. The Company compares the fair value of the reporting unit with its carrying value to assess if goodwill has been impaired. Based on the assumptions as to growth, discount rates and the weighting used for each respective valuation methodology, results of the valuations could be significantly changed. However, the Company believes that the methodologies 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, 2017 and 2016 and determined that no adjustment to the carrying value was required for the years ended December 31, 2017 and 2016.
Revenue Recognition	Revenue Recognition Sales are recognized when title passes to the customer either when goods are shipped or when they are delivered and based on the terms of the sale, there is persuasive evidence of an agreement, the price is fixed or determinable and collectability is reasonably assured. Revenue related to shipping and handling costs billed to customers is included in net sales and the related shipping and handling costs are included in cost of products sold.
Research and Development	Research and Development Research and development costs for new products are expensed as incurred and totaled $2.1 million in 2017, $2.7 million in 2016 and $2.9 million in 2015.
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. Deferred tax liabilities and assets are recognized for the expected future tax consequences of events that have been reflected on the Consolidated Financial Statements. Deferred tax liabilities and assets are determined based on the differences between the book and tax basis of particular assets and liabilities and operating loss carryforwards using tax rates in effect for the years in which the differences are expected to reverse. Deferred tax assets are recognized to the extent that the Company believes these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. Uncertain tax positions are recorded in accordance with ASC 740 on the basis of a two-step process whereby (1) the Company determines whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
Advertising	Advertising Advertising costs are expensed as incurred and totaled $1.7 million in 2017, $1.8 million in 2016 and $1.7 million in 2015.
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 gains and losses for the years ended December 31, 2017, 2016 and 2015 were a gain of $.3 million, a gain of $1.3 million and a loss of $7.4 million, respectively. Upon sale or substantially complete liquidation of an investment in a foreign entity, the cumulative translation adjustment for that entity is reclassified from Accumulated other comprehensive income (loss) to earnings.
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 The Company accounts for acquisitions in accordance with ASC 805 “Business Combinations.”
Derivative Financial Instruments	Derivative Financial Instruments The Company does not hold derivatives for trading purposes.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In January 2017, the Financial Accounting Standards Board “FASB” issued Accounting Standards Update (“ASU”) 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Under the amendments in this Update, an entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This ASU is effective for an entity’s annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The early adoption of ASU 2017-04 had no impact on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 amends several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The Company adopted ASU 2016-09 effective January 1, 2017. ASU 2016-09 requires prospective recognition of excess tax benefits and deficiencies resulting from stock-based compensation awards vesting and exercises to be recognized as a discrete income tax adjustment in the income statement. Previously, these amounts were recognized in Paid in capital. The Company had $2 million excess tax benefit recorded during the year ended December 31, 2017. In addition, ASU 2016-09 requires excess tax benefits and deficiencies to be prospectively excluded from the assumed future proceeds in the calculation of diluted shares, resulting in an insignificant increase in diluted weighted average number of shares outstanding for the year ended December 31, 2017 and an immaterial impact on earnings per share. ASU 2016-09 requires that excess tax benefits from share-based compensation awards be reported as operating activities in the Statements of Consolidated Cash Flows. Previously, this activity was included in financing activities on the Statements of Consolidated Cash Flows. As permitted, the Company has elected to apply this change prospectively. ASU 2016-09 requires that employee taxes paid when an employer withholds shares for tax withholding purposes be reported as financing activities in the Statements of Consolidated Cash Flows on a retrospective basis. Previously, this activity was included in financing activities and, therefore, this resulted in no impact to the Statements of Consolidated Cash Flows. The Company has elected to account for forfeitures as they occur to estimate the number of stock-based awards expected to vest as permitted by ASU 2016-09. In July 2015, the FASB issued ASU-2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory”. The amendments in this Update more closely align the measurement of inventory in GAAP with the measurement of inventory in International Financial Reporting Standards (IFRS). The Company adopted ASU 2015-11 effective January 1, 2017. Under ASU 2015-11, an entity should measure inventory within the scope of this Update at the lower of cost and net realizable value. Net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Subsequent measurement is unchanged for inventory measured using LIFO or the retail inventory method. The amendments in this Update are effective for fiscal years beginning after December 15, 2016 including interim periods within those fiscal years. The amendments in this Update have been applied prospectively and did not have an effect on Company’s consolidated financial statements for the year ended December 31, 2017.
New Accounting Standards to be Adopted	New Accounting Standards To Be Adopted In March 2017, the FASB issued ASU 2017-07, “Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017. Early adoption is permitted for any entity in any interim or annual period. If an entity early adopts the amendment in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period as well as the nature and reason for the change in accounting principle. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” The amendments in this Update require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within the annual reporting period. Early adoption is permitted for any entity in any interim or annual period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” ASU 2016-16 modifies the recognition of income tax expense resulting from intra-entity transfers of assets other than inventory. Pursuant to this amendment, entities should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This amendment eliminates the exception for an intra-entity transfers of assets other than inventory. This ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within the annual reporting period. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The amendments in this Update require the recognition of assets and liabilities arising from lease transactions on the balance sheet and the disclosure of key information about leasing arrangements. Accordingly, a lessee will recognize a lease asset for its right to use the underlying asset and a lease liability for the corresponding lease obligation. Both the asset and liability will initially be measured at the present value of the future minimum lease payments over the lease term. Subsequent measurement, including the presentation of expenses and cash flows, will depend on the classification of the lease as either a finance or an operating lease. Initial costs directly attributable to negotiating and arranging the lease will be included in the asset. For leases with a term of 12 months or less, a lessee can make an accounting policy election by class of underlying asset to not recognize an asset and corresponding liability. Lessees will also be required to provide additional qualitative and quantitative disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. These disclosures are intended to supplement the amounts recorded in the financial statements and provide additional information about the nature of an organization’s leasing activities. The amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating what impact, if any, its adoption will have to the presentation of the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” or ASU 2014-09. ASU 2014-09 requires an entity to recognize revenue in a matter that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, the amendment provides five steps that an entity should apply when recognizing revenue. The amendment also specifies the accounting of some costs to obtain or fulfill a contract with a customer and expands the disclosure requirements around contracts with customers. An entity can either adopt this amendment retrospectively to each prior reporting period presented or retrospectively with cumulative effect of initially applying the update recognized at the date of initial application. In August 2015, the FASB issued ASU No. 2015-14 deferring the effective date of the amendment to annual reporting periods beginning after December 15, 2017, including interim periods therein. The Company developed and executed on an implementation plan to meet the January 1, 2018 adoption date. The Company established a cross-functional implementation team to analyze the impact of the standard on revenue contracts, which included scoping its revenue streams and reviewing contracts in order to compare historical accounting policies and practices to the new revenue standards. In addition, the Company implemented changes to processes and controls to meet the standard’s reporting and disclosure requirements. The Company adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective transition method applied to contracts that were not yet completed at that date. The adoption will not have a material impact on the Company’s consolidated financial statements, other than additional disclosures.

Other Financial Statement Inf28

Other Financial Statement Information (Tables)	12 Months Ended
	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Inventories - Net	Inventories – net December 31 2017 2016 Raw materials $ 42,712 $ 37,535 Work-in-process 9,609 9,057 Finished products 33,780 35,629 86,101 82,221 Excess of current cost over LIFO cost (2,991 ) (2,784 ) Noncurrent portion of inventory (5,224 ) (4,953 ) $ 77,886 $ 74,484
Property, Plant and Equipment - Net	Major classes of property, plant and equipment are as follows: December 31 2017 2016 Land and improvements $ 13,141 $ 12,584 Buildings and improvements 75,941 72,662 Machinery, equipment and aircraft 166,999 158,078 Construction in progress 5,124 3,877 261,205 247,201 Less accumulated depreciation (152,607 ) (142,097 ) $ 108,598 $ 105,104

Pension Plans (Tables)

Pension Plans (Tables)	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Service cost $ 255 $ 203 $ 189 Interest cost 1,456 1,465 1,436 Expected return on plan assets (1,903 ) (1,824 ) (1,849 ) Recognized net actuarial loss 468 522 583 Net periodic pension cost $ 276 $ 366 $ 359
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: 2017 2016 Projected benefit obligation at beginning of the year $ 34,858 $ 34,763 Service cost 255 203 Interest cost 1,456 1,465 Actuarial (gain) loss 2,215 (516 ) Benefits paid (2,753 ) (1,057 ) Projected benefit obligation at end of year $ 36,031 $ 34,858 Fair value of plan assets at beginning of the year $ 24,435 $ 23,136 Actual return on plan assets 3,460 1,365 Employer contributions 225 991 Benefits paid (2,753 ) (1,057 ) Fair value of plan assets at end of the year $ 25,367 $ 24,435 Unfunded pension obligation $ 10,664 $ 10,423
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: 2017 2016 Balance at January 1 $ (5,855 ) $ (6,216 ) Reclassification adjustments: Pre-tax amortized net actuarial loss 468 522 Tax provision (199 ) (196 ) 269 326 Adjustment to recognize gain (loss) on unfunded pension obligations: Pre-tax (loss) gain (657 ) 56 Tax provision 247 (21 ) (410 ) 35 Balance at December 31 $ (5,997 ) $ (5,855 )
Accumulated Benefit Obligations in Excess of Plan Assets	The Plan had accumulated benefit obligations in excess of Plan assets as follows: 2017 2016 Accumulated benefit obligation $ 36,030 $ 34,858 Fair market value of assets 25,367 24,435
Weighted-Average Assumptions Used to Determine Benefit Obligations	2017 2016 Discount rate 3.75% 4.25% Rate of compensation increase n/a n/a
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost	Weighted-average assumptions used to determine net periodic benefit cost for the year ended December 31 are as follows: 2017 2016 2015 Discount rate 4.25% 4.25% 4.00% Rate of compensation increase n/a n/a n/a Expected long-term return on plan assets 8.00 8.00 8.00
Fair Value of the Plan Assets	The fair value of the Plan assets as of December 31, 2017 and 2016, by category, are as follows: At December 31, 2017 Total Assets at Fair Value Quoted Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category Cash $ 453 $ 453 $ 0 $ 0 Equity Securities 16,667 16,667 0 0 U.S. Treasury Bonds 3,517 3,517 0 0 Corporate Bonds 4,730 0 4,730 0 Total $ 25,367 $ 20,637 $ 4,730 $ 0 At December 31, 2016 Total Assets at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category Cash $ 1,042 $ 1,042 $ 0 $ 0 Equity Securities 14,814 14,814 0 0 U.S. Treasury Bonds 3,893 3,893 0 0 Corporate Bonds 4,686 0 4,686 0 Total $ 24,435 $ 19,749 $ 4,686 $ 0
Weighted-Average Asset Allocations of Plan Assets	The Plan weighted-average asset allocations at December 31, 2017 and 2016, by asset category, are as follows: Plan assets at December 31 2017 2016 Asset category Equity securities 66 % 61 % Debt securities 32 35 Cash and equivalents 2 4 100 % 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 30-80% 60% Fixed Income 20-70% 40% Cash Equivalents 0-10%
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 2018 $ 1,011 2019 1,091 2020 1,167 2021 1,251 2022 1,368 2023-2027 8,269

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income ("AOCI") (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017 Year Ended December 31, 2016 Cumulative Cumulative Unrecognized Translation Unrecognized Translation Benefit Cost Adjustment Total Benefit Cost Adjustment Total Balance at January 1 $ (5,874 ) $ (51,495 ) $ (57,369 ) $ (6,235 ) $ (47,916 ) $ (54,151 ) Other comprehensive income before reclassifications: Gain (loss) on foreign currency translation adjustment 0 10,070 10,070 0 (3,579 ) (3,579 ) Gain (loss) on unfunded pension obligations (410 ) 0 (410 ) 35 0 35 Amounts reclassified from AOCI: Amortization of defined benefit pension actuarial loss (a) 269 0 269 326 0 326 Net current period other comprehensive income (loss) (141 ) 10,070 9,929 361 (3,579 ) (3,218 ) Balance at December 31 $ (6,014 ) $ (41,425 ) $ (47,440 ) $ (5,874 ) $ (51,495 ) $ (57,369 ) (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, 2017
Debt Disclosure [Abstract]
Debt and Credit Arrangements	December 31 2017 2016 Short-term debt Secured notes Thailand Bhat denominated at 3.95% 864 1,315 Current portion of long-term debt 1,448 1,448 Total short-term debt 2,312 2,763 Long-term debt USD denominated at 2.69%, due 2019 23,133 29,429 USD denominated at 2.71%, due 2026 12,433 13,881 Brazilian real denominated at 4.60% due 2022 286 0 Australian dollar denominated at 2.83%, due 2019 194 1,081 Total long-term debt 36,046 44,391 Less current portion (1,448 ) (1,448 ) Total long-term debt, less current portion 34,598 42,943 Total debt $ 36,910 $ 45,706

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Before Income Taxes	Income before income taxes was derived from the following sources: 2017 2016 2015 United States $ 4,774 $ 3,501 $ 4,421 Foreign 21,032 17,452 7,285 $ 25,806 $ 20,953 $ 11,706
Components of Income Taxes	The components of income taxes for the year ended December 31 are as follows: 2017 2016 2015 Current Federal $ 4,592 $ (1,698 ) $ 2,679 Foreign 5,998 5,115 2,951 State and local 126 32 345 10,716 3,449 5,975 Deferred Federal 2,316 2,986 (611 ) Foreign 12 (914 ) (309 ) State and local 108 177 (24 ) 2,436 2,249 (944 ) Income taxes $ 13,152 $ 5,698 $ 5,031
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 year ended December 31 are summarized as follows: 2017 2016 2015 U. S. federal statutory tax rate 35% 35% 35% Federal tax at statutory rate $ 9,033 $ 7,334 $ 4,097 State and local taxes, net of federal benefit 82 20 89 U.S. federal permanent items (60 ) 400 251 Domestic production activities deduction (116 ) 0 (321 ) Foreign earnings and related tax credits 0 716 700 Tax act - transition tax 2,592 0 0 Non-U.S. tax rate variances (1,491 ) (1,484 ) (685 ) Unrecognized tax benefits 0 (195 ) (768 ) Valuation allowance 88 (414 ) 1,754 Tax credits (255 ) (252 ) (212 ) Tax Act - remeasurement of deferreds 3,161 0 0 Other, net 118 (427 ) 126 $ 13,152 $ 5,698 $ 5,031
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: 2017 2016 Deferred tax assets: Accrued compensation and benefits $ 1,093 $ 1,250 Inventory valuation reserves 2,332 3,422 Allowance for doubtful accounts 360 471 Benefit plan reserves 7,981 11,130 Net operating loss carryforwards 3,402 3,358 Other accrued expenses 2,489 2,445 Unrealized foreign exchange 1,462 2,812 Gross deferred tax assets 19,119 24,888 Valuation allowance (3,965 ) (3,805 ) Net deferred tax assets 15,154 21,083 Deferred tax liabilities: Depreciation and other basis differences (6,313 ) (8,341 ) Intangibles (2,706 ) (2,887 ) Undistributed foreign earnings (426 ) (1,642 ) Other (25 ) (83 ) Deferred tax liabilities (9,470 ) (12,953 ) Net deferred tax assets $ 5,684 $ 8,130 2017 2016 Change in net deferred tax assets: Deferred income tax expense Ordinary movement $ (473 ) $ (2,249 ) Tax act - transition tax 1,198 0 Tax impact deferred rate (3,161 ) 0 Items of other comprehensive income (loss) 48 (48 ) Currency translation (58 ) 191 Total change in net deferred tax assets $ (2,446 ) $ (2,106 )
Changes in Unrecognized Tax Benefits Excluding Interest and Penalties	The following is a tabular reconciliation of the total amounts of unrecognized tax benefits, excluding interest and penalties, for the year ended December 31: 2017 2016 2015 Balance at January 1 $ 0 $ 178 $ 794 Additions for tax positions of prior years 0 0 0 Reductions for tax positions of prior years 0 0 (616 ) Expiration of statutes of limitations 0 (178 ) 0 Balance at December 31 $ 0 $ 0 $ 178

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of RSUs	A summary of the RSUs for the year ended December 31, 2017 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, 2017 130,168 15,974 146,142 $ 38.46 Granted 80,247 10,560 90,807 54.60 Vested 0 (5,859 ) (5,859 ) 45.85 Forfeited (9,843 ) (2,461 ) (12,304 ) 46.86 Nonvested as of December 31, 2017 200,572 18,214 218,786 $ 52.68
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: 2017 2016 2015 Risk-free interest rate 2.0 % N/A 2.1 % Dividend yield 1.7 % N/A 1.6 % Expected life (years) 5 N/A 5 Expected volatility 36.8 % N/A 37.9 %
Long Term Incentive Plan [Member]
Stock Option Activity in Company's Plan	Activity in the Company’s LTIP for the year ended December 31, 2017 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, 2017 52,750 $ 54.54 Granted 5,000 $ 48.00 Exercised (28,500 ) $ 46.90 Forfeited 0 $ 0.00 Outstanding (vested and expected to vest) at December 31, 2017 29,250 $ 56.84 7.1 $ 423 Exercisable at December 31, 2017 21,625 $ 60.69 6.5 $ 231
Stock Options [Member]
Stock Option Activity in Company's Plan	Activity in the Company’s 1999 Stock Option Plan for the year ended December 31, 2017 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, 2017 5,550 $ 48.35 Exercised (4,800 ) $ 49.79 Forfeited 0 $ 0.00 Outstanding (exercisable and vested) at December 31, 2017 750 $ 39.10 1.8 $ 24

Computation of Earnings Per S34

Computation of Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Numerator Net income $ 12,654 $ 15,255 $ 6,675 Denominator Determination of shares (in thousands) Weighted-average common shares outstanding 5,102 5,166 5,350 Dilutive effect - share-based awards 31 12 16 Diluted weighted-average common shares outstanding 5,133 5,178 5,366 Earnings per common share Basic $ 2.48 $ 2.95 $ 1.25 Diluted $ 2.47 $ 2.95 $ 1.24

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2016
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, 2017 December 31, 2016 Gross Accumulated Gross Carrying Accumulated Amount Amortization Amount Amortization Finite-lived intangible assets Patents $ 4,806 $ (4,791 ) $ 4,816 $ (4,799 ) Land use rights 1,199 (201 ) 1,070 (180 ) Trademark 1,770 (1,166 ) 1,725 (1,039 ) Technology 3,149 (1,215 ) 3,057 (1,031 ) Customer relationships 12,350 (5,881 ) 12,073 (5,217 ) $ 23,274 $ (13,254 ) $ 22,741 $ (12,266 ) Indefinite-lived intangible assets Goodwill $ 16,544 $ 15,769
Changes in Carrying Amount of Goodwill by Segment	USA The Americas EMEA Asia-Pacific Total Balance at January 1, 2016 $ 3,078 $ 3,918 $ 1,301 $ 7,524 $ 15,821 Currency translation and other 0 99 (14 ) (137 ) (52 ) Balance at December 31, 2016 3,078 4,017 1,287 7,387 15,769 Currency translation 0 275 208 292 775 Balance at December 31, 2017 $ 3,078 $ 4,292 $ 1,495 $ 7,679 $ 16,544

Fair Value of Financial Asset36

Fair Value of Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
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, 2017 December 31, 2016 Fair Carrying Value Fair Value Carrying Value Long-term debt and related current maturities $ 35,369 $ 36,046 $ 43,209 $ 44,391

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Summary of Company's Reportable Segment	The following table presents a summary of the Company’s reportable segments for the year ended December 31, 2017, 2016 and 2015. Financial results for the PLP-USA segment include the elimination of all segments’ intercompany profits in inventory. Year Ended December 31 2017 2016 2015 Net sales PLP-USA $ 147,646 $ 135,260 $ 142,470 The Americas 69,764 60,049 59,290 EMEA 63,916 56,411 53,778 Asia-Pacific 96,886 84,914 99,128 Total net sales $ 378,212 $ 336,634 $ 354,666 Intersegment sales PLP-USA $ 12,234 $ 9,471 $ 9,339 The Americas 5,570 5,132 5,074 EMEA 1,120 1,363 1,652 Asia-Pacific 8,596 7,827 8,364 Total intersegment sales $ 27,520 $ 23,793 $ 24,429 Interest income PLP-USA $ 0 $ 0 $ 0 The Americas 283 79 145 EMEA 47 116 123 Asia-Pacific 100 96 123 Total interest income $ 430 $ 291 $ 391 Interest expense PLP-USA $ (941 ) $ (738 ) $ (440 ) The Americas (10 ) (14 ) (56 ) EMEA (31 ) (13 ) (23 ) Asia-Pacific (79 ) (79 ) (46 ) Total interest expense $ (1,061 ) $ (844 ) $ (565 ) Income taxes PLP-USA $ 7,142 $ 1,494 $ 2,387 The Americas 3,593 2,507 1,399 EMEA 1,583 1,862 1,646 Asia-Pacific 834 (165 ) (401 ) Total income taxes $ 13,152 $ 5,698 $ 5,031 Net income (loss) PLP-USA $ (2,367 ) $ 2,007 $ 2,031 The Americas 8,169 5,881 3,178 EMEA 4,088 6,243 4,881 Asia-Pacific 2,764 1,124 (3,415 ) Total net income $ 12,654 $ 15,255 $ 6,675 Year Ended December 31 2017 2016 2015 Expenditure for long-lived assets PLP-USA $ 4,474 $ 18,314 $ 5,164 The Americas 1,272 2,634 2,074 EMEA 2,329 1,450 1,673 Asia-Pacific 3,158 2,327 1,843 Total expenditures for long-lived assets $ 11,233 $ 24,725 $ 10,754 Depreciation and amortization PLP-USA $ 5,389 $ 4,937 $ 4,551 The Americas 1,985 1,874 1,862 EMEA 1,678 1,402 1,464 Asia-Pacific 3,738 3,783 3,655 Total depreciation and amortization $ 12,790 $ 11,996 $ 11,532 As of December 31 2017 2016 Identifiable assets PLP-USA $ 116,484 $ 122,326 The Americas 70,720 63,643 EMEA 62,524 54,493 Asia-Pacific 110,057 100,475 Total identifiable assets $ 359,785 $ 340,937 Long-lived assets PLP-USA $ 53,211 $ 54,048 The Americas 16,365 16,158 EMEA 12,971 10,619 Asia-Pacific 26,051 24,279 Total long-lived assets $ 108,598 $ 105,104

Product Warranty Reserve (Table

Product Warranty Reserve (Tables)	12 Months Ended
	Dec. 31, 2017
Guarantees [Abstract]
Roll Forward of Product Warranty Reserve	The following is a rollforward of the product warranty reserve: 2017 2016 2015 Balance at January 1 $ 1,058 $ 714 $ 892 Additions charged to costs and expenses 347 649 74 Warranty usage (399 ) (269 ) (158 ) Currency translation 70 (36 ) (94 ) Balance at December 31 $ 1,076 $ 1,058 $ 714

Quarterly Financial Informati39

Quarterly Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations	The following table summarizes the Company’s results of operations for each of the quarters in 2017 and 2016: Quarter ended March 31 June 30 September 30 December 31 2017 Net sales $ 84,569 $ 97,512 $ 99,239 $ 96,892 Gross profit 24,665 29,673 33,535 30,755 Income before income taxes 2,118 6,258 9,739 7,691 Net income 1,518 4,156 6,278 702 Net income, basic $ 0.30 $ 0.81 $ 1.23 $ 0.14 Net income, diluted $ 0.30 $ 0.81 $ 1.23 $ 0.14 2016 Net sales $ 78,682 $ 83,220 $ 88,299 $ 86,433 Gross profit 24,289 26,806 28,855 29,464 Income before income taxes 3,656 3,773 6,534 6,990 Net income 2,658 2,755 4,742 5,100 Net income, basic $ 0.51 $ 0.53 $ 0.92 $ 1.00 Net income, diluted $ 0.51 $ 0.53 $ 0.92 $ 0.99

Charges Related to Restructur40

Charges Related to Restructuring Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Summary by Reporting Segment of Accruals as a Result of Restructuring	A summary by reporting segment of the accruals recorded as a result of the restructuring is as follows: Severance Lease Termination Costs Asset Disposals Other Total December 31, 2016 Balance $ 0 $ 478 $ 0 $ 0 $ 478 Charges 0 0 0 0 0 Payments and other adjustments 0 (63 ) 0 24 (39 ) December 31, 2017 Balance $ 0 $ 415 $ 0 $ 24 $ 439

Significant Accounting Polici41

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Research and development costs	$ 2.1	$ 2.7	$ 2.9
Advertising cost	1.7	1.8	1.7
Aggregate foreign currency transaction gains and losses	$ 0.3	$ 1.3	$ (7.4)
Operating lease terms	12 months
ASU 2016-09 [Member]
Significant Accounting Policies [Line Items]
Excess tax benefit from stock-based compensation awards	$ 2
Minimum [Member]
Significant Accounting Policies [Line Items]
Amortization period of intangible assets	1 year
Maximum [Member]
Significant Accounting Policies [Line Items]
Amortization period of intangible assets	20 years
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 Inf42

Other Financial Statement Information - Inventories - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 42,712	$ 37,535
Work-in-process	9,609	9,057
Finished products	33,780	35,629
Inventory, gross	86,101	82,221
Excess of current cost over LIFO cost	(2,991)	(2,784)
Noncurrent portion of inventory	(5,224)	(4,953)
Inventories - net	$ 77,886	$ 74,484

Other Financial Statement Inf43

Other Financial Statement Information - Additional Information (Detail) - USD ($) $ in Millions	Nov. 02, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Cost of inventories for certain materials using LIFO method		$ 25.1	$ 28.6
Depreciation of property and equipment		11.8	10.8	$ 10.3
Capital leases of machinery, equipment and aircraft		$ 0.2	$ 0.2
Name of plaintiff		Altalink, L.P.
Complaint filling date		November 2,016
Estimated damages from defendants	$ 56

Other Financial Statement Inf44

Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 261,205	$ 247,201
Less accumulated depreciation	(152,607)	(142,097)
Property and equipment - Net	108,598	105,104
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	13,141	12,584
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	75,941	72,662
Machinery, Equipment and Aircraft [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	166,999	158,078
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 5,124	$ 3,877

Pension Plans - Components of N

Pension Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 255	$ 203	$ 189
Interest cost	1,456	1,465	1,436
Expected return on plan assets	(1,903)	(1,824)	(1,849)
Recognized net actuarial loss	468	522	583
Net periodic pension cost	$ 276	$ 366	$ 359

Pension Plans - Projected Benef

Pension Plans - Projected Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Funded Status Of Plan [Abstract]
Projected benefit obligation at beginning of the year	$ 34,858	$ 34,763
Service cost	255	203	$ 189
Interest cost	1,456	1,465	1,436
Actuarial (gain) loss	2,215	(516)
Benefits paid	(2,753)	(1,057)
Projected benefit obligation at end of year	36,031	34,858	34,763
Fair value of plan assets at beginning of the year	24,435	23,136
Actual return on plan assets	3,460	1,365
Employer contributions	225	991
Benefits paid	(2,753)	(1,057)
Fair value of plan assets at end of the year	25,367	24,435	$ 23,136
Unfunded pension obligation	$ 10,664	$ 10,423

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Compensation Income Net Of Tax [Abstract]
Beginning Balance	$ (5,855)	$ (6,216)
Pre-tax amortized net actuarial loss	468	522
Tax provision	(199)	(196)
Net of reclassification adjustments	269	326	$ 364
Pre-tax (loss) gain	(657)	56
Tax provision	247	(21)
Net of tax adjustment to recognize (loss) gain on unfunded pension obligations	(410)	35	408
Ending Balance	$ (5,997)	$ (5,855)	$ (6,216)

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension And Other Employee Benefit Plans [Line Items]
Estimated net loss for the PLP-USA pension plan in 2018	$ 200,000
Prior service cost	0
Pre-tax unfunded pension obligation gain (loss)	$ (700,000)
Discount rate	3.75%	4.25%
Asset performance rate of return assumption	8.00%
Expected long-term return on plan assets	8.00%	8.00%	8.00%
Contribution to pension plan	$ 0
Expense for contribution plan	$ 5,100,000	$ 5,800,000	$ 5,500,000
Weighted average of one year treasury bill	1.00%
Interest rate for the supplemental profit sharing plan	2.76%	1.65%
Expense for the supplemental profit sharing plan	$ 500,000	$ 500,000	$ 300,000
Supplemental profit sharing plan unfunded status	4,800,000	$ 4,300,000
Reduction in Discount Rate [Member]
Pension And Other Employee Benefit Plans [Line Items]
Pre-tax unfunded pension obligation gain (loss)	$ (2,800,000)
Discount rate	0.50%
Gain on Industry Updates to Mortality Table [Member]
Pension And Other Employee Benefit Plans [Line Items]
Pre-tax unfunded pension obligation gain (loss)	$ 300,000
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)	$ 1,600,000

Pension Plans - Accumulated Ben

Pension Plans - Accumulated Benefit Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets [Abstract]
Accumulated benefit obligation	$ 36,030	$ 34,858
Fair market value of assets	$ 25,367	$ 24,435

Pension Plans - Weighted-Averag

Pension Plans - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail)	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation [Abstract]
Discount rate	3.75%	4.25%
Rate of compensation increase	0.00%	0.00%

Pension Plans - Weighted-Aver51

Pension Plans - Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.25%	4.25%	4.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Expected long-term return on plan assets	8.00%	8.00%	8.00%

Pension Plans - Fair Value of t

Pension Plans - Fair Value of the Company's Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	$ 25,367	$ 24,435	$ 23,136
U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	3,517	3,893
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	453	1,042
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	16,667	14,814
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	4,730	4,686
Quoted Prices in Active Markets for Identical Assets (Level1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	20,637	19,749
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	3,517	3,893
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	453	1,042
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	16,667	14,814
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	4,730	4,686
Significant Observable Inputs (Level 2) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	4,730	4,686
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	$ 0	$ 0

Pension Plans - Weighted-Aver53

Pension Plans - Weighted-Average Asset Allocations of Plan Assets (Detail)	Dec. 31, 2017	Dec. 31, 2016
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	66.00%	61.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	32.00%	35.00%
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	2.00%	4.00%

Pension Plans - Weighted-Aver54

Pension Plans - Weighted-Average Target Allocations of Plan Assets (Detail)	Dec. 31, 2017
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	60.00%
Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	30.00%
Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	80.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	40.00%
Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	20.00%
Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	70.00%
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, 2017USD ($)
Compensation And Retirement Disclosure [Abstract]
2,018	$ 1,011
2,019	1,091
2,020	1,167
2,021	1,251
2,022	1,368
2023-2027	$ 8,269

Accumulated Other Comprehensi56

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (57,369)	$ (54,151)
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	10,070	(3,579)	$ (19,789)
Gain (loss) on unfunded pension obligations	(410)	35	408
Amounts reclassified from AOCI:
Recognized net actuarial loss	269	326	364
Other comprehensive income (loss), net of tax	9,929	(3,218)	(19,017)
Ending Balance	(47,440)	(57,369)	(54,151)
Defined Benefit Pension Plan Activity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,874)	(6,235)
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	0	0
Gain (loss) on unfunded pension obligations	(410)	35	408
Amounts reclassified from AOCI:
Recognized net actuarial loss	269	326	364
Other comprehensive income (loss), net of tax	(141)	361
Ending Balance	(6,014)	(5,874)	(6,235)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(51,495)	(47,916)
Other comprehensive income before reclassifications:
Gain (loss) on foreign currency translation adjustment	10,070	(3,579)	(19,789)
Gain (loss) on unfunded pension obligations	0	0
Amounts reclassified from AOCI:
Recognized net actuarial loss	0	0
Other comprehensive income (loss), net of tax	10,070	(3,579)
Ending Balance	$ (41,425)	$ (51,495)	$ (47,916)

Debt and Credit Arrangements -

Debt and Credit Arrangements - Debt and Credit Arrangements (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Short-term debt
Current portion of long-term debt	$ 1,448	$ 1,448
Short-term debt	2,312	2,763
Long-term debt
Total long-term debt	36,046	44,391
Less current portion	(1,448)	(1,448)
Total long-term debt, less current portion	34,598	42,943
Total debt	36,910	45,706
USD Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	23,133	29,429
Australian Dollar Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	194	1,081
Brazilian Real Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	286	0
USD Denominated Long-term Debt at 2.71%, due in 2026 [Member]
Long-term debt
Total long-term debt	12,433	13,881
Thailand Bhat Denominated Secured Notes Short Term Debt [Member]
Short-term debt
Short-term debt	$ 864	$ 1,315

Debt and Credit Arrangements 58

Debt and Credit Arrangements - Debt and Credit Arrangements (Parenthetical) (Detail)	Dec. 31, 2017	Dec. 31, 2016
USD Denominated Long-term Debt [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.69%	2.69%
USD Denominated Long-term Debt at 2.71%, due in 2026 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.71%	2.71%
Brazilian Real Denominated Long-term Debt [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.60%	4.60%
Australian Dollar Denominated Long-term Debt [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.83%	2.83%
Thailand Bhat Denominated Secured Notes Short Term Debt [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.95%	3.95%

Debt and Credit Arrangements 59

Debt and Credit Arrangements - Additional Information (Detail) AUD in Millions	Aug. 22, 2016USD ($)	Jun. 27, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017AUD	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Aug. 21, 2016USD ($)
Debt Instrument [Line Items]
Borrowed amount		$ 14,500,000
Fixed rate on borrowing		2.71%
Maturity date		Jul. 1, 2026
Current borrowing capacity							$ 50,000,000
Increased borrowing capacity	$ 65,000,000
Extended debt instrument date	Jun. 30, 2019
Debt to earnings before Interest, Taxes and Depreciation ratio	225.00%
Line of credit remaining borrowing capacity			$ 41,500,000
Aggregate maturities of long-term debt for 2018			1,400,000
Aggregate maturities of long-term debt for 2019			24,800,000
Aggregate maturities of long-term debt for 2020			1,500,000
Aggregate maturities of long-term debt for 2021			1,500,000
Aggregate maturities of long-term debt there after			6,800,000
Interest paid			1,000,000		$ 700,000	$ 500,000
Total outstanding guarantees			5,400,000
Letter of credit outstanding			$ 800,000
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%
Australian Subsidiaries [Member]
Debt Instrument [Line Items]
Borrowings | AUD				AUD 0.3
Expiring date of Australian Bank Bill Swap Bid Rate			Jun. 30, 2019	Jun. 30, 2019
Interest rate for Line of credit			2.83%
Australian Subsidiaries [Member] | Australian Bank Bill Swap Bid Rate [Member]
Debt Instrument [Line Items]
Interest rate of LIBOR plus			1.125%	1.125%
Subsidiaries [Member]
Debt Instrument [Line Items]
Line of credit			$ 5,000,000

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Leases [Line Items]
Rental expense	$ 2.6	$ 2.1	$ 3.4
Future minimum rental commitments, 2018	2
Future minimum rental commitments, 2019	1.8
Future minimum rental commitments, 2020	1.5
Future minimum rental commitments, 2021	1.3
Future minimum rental commitments, 2022	1.3
Future minimum rental commitments, Thereafter	7.2
Sublease rentals to be received	4.3
Future minimum rental commitments for capital leases, 2022	0
Imputed interest maximum amount, 2022	0
Maximum [Member]
Leases [Line Items]
Future minimum rental commitments for capital leases, 2018	0.1
Future minimum rental commitments for capital leases, 2019	0.1
Future minimum rental commitments for capital leases, 2020	0.1
Future minimum rental commitments for capital leases, 2021	0.1
Imputed interest maximum amount, 2018	0.1
Imputed interest maximum amount, 2019	0.1
Imputed interest maximum amount, 2020	0.1
Imputed interest maximum amount, 2021	$ 0.1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Reconciliation [Line Items]
Income taxes		$ 13,152,000	$ 5,698,000	$ 5,031,000
Cash taxes paid net of refunds		$ 3,400,000	$ 6,900,000	$ 12,300,000
Tax Cuts and Jobs Act incomplete accouning transition tax unrepatriated earnings foreign subsidiaries payable period		8 years
U.S. federal statutory tax rate		35.00%	35.00%	35.00%
Deferred tax assets, provisional decrease		$ 6,100
Deferred tax liability, provisional decrease		2,900
Adjustment to deferred income tax expense		3,200
Provisional transition tax expense		3,800
Transition tax expense, affects tax rate		2,600
Net operating loss carryforwards, indefinite		$ 10,000,000
Foreign net operating loss carryforwards expiration period start year		2,024
Foreign net operating loss carryforwards expiration period end year		2,027
Valuation allowance		$ 3,965,000	$ 3,805,000
Net increase in valuation allowance from the prior year		200,000
Recognized accrued interest and penalties reversed		100,000	100,000	$ 100,000
Payment of interest accrued		0	0	100,000
Accrued penalties payment		0	0	0
Unrecognized tax benefits that would impact effective tax rate		0	$ 0	$ 200,000
Foreign Country [Member]
Income Tax Reconciliation [Line Items]
Net operating loss carryforwards		11,300,000
Net operating loss carryforwards, definite		1,000,000
Scenario Plan [Member]
Income Tax Reconciliation [Line Items]
U.S. federal statutory tax rate	21.00%
ASU 2016-09 [Member]
Income Tax Reconciliation [Line Items]
Excess tax benefit from stock-based compensation awards		$ 200,000

Income Taxes - Income Before In

Income Taxes - Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
United States									$ 4,774	$ 3,501	$ 4,421
Foreign									21,032	17,452	7,285
INCOME BEFORE INCOME TAXES	$ 7,691	$ 9,739	$ 6,258	$ 2,118	$ 6,990	$ 6,534	$ 3,773	$ 3,656	$ 25,806	$ 20,953	$ 11,706

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current
Federal	$ 4,592	$ (1,698)	$ 2,679
Foreign	5,998	5,115	2,951
State and local	126	32	345
Current, Total	10,716	3,449	5,975
Deferred
Federal	2,316	2,986	(611)
Foreign	12	(914)	(309)
State and local	108	177	(24)
Deferred Total	2,436	2,249	(944)
Income taxes	$ 13,152	$ 5,698	$ 5,031

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U. S. federal statutory tax rate	35.00%	35.00%	35.00%
Federal tax at statutory rate	$ 9,033	$ 7,334	$ 4,097
State and local taxes, net of federal benefit	82	20	89
U.S. federal permanent items	(60)	400	251
Domestic production activities deduction	(116)	0	(321)
Foreign earnings and related tax credits	0	716	700
Tax act - transition tax	2,592	0	0
Non-U.S. tax rate variances	(1,491)	(1,484)	(685)
Unrecognized tax benefits	0	(195)	(768)
Valuation allowance	88	(414)	1,754
Tax credits	(255)	(252)	(212)
Tax Act - remeasurement of deferreds	3,161	0	0
Other, net	118	(427)	126
Income taxes	$ 13,152	$ 5,698	$ 5,031

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, 2017	Dec. 31, 2016
Deferred tax assets:
Accrued compensation and benefits	$ 1,093	$ 1,250
Inventory valuation reserves	2,332	3,422
Allowance for doubtful accounts	360	471
Benefit plan reserves	7,981	11,130
Net operating loss carryforwards	3,402	3,358
Other accrued expenses	2,489	2,445
Unrealized foreign exchange	1,462	2,812
Gross deferred tax assets	19,119	24,888
Valuation allowance	(3,965)	(3,805)
Net deferred tax assets	15,154	21,083
Deferred tax liabilities:
Depreciation and other basis differences	(6,313)	(8,341)
Intangibles	(2,706)	(2,887)
Undistributed foreign earnings	(426)	(1,642)
Other	(25)	(83)
Deferred tax liabilities	(9,470)	(12,953)
Net deferred tax assets	5,684	8,130
Deferred income tax expense
Ordinary movement	(473)	(2,249)
Tax act - transition tax	1,198	0
Tax impact deferred rate	(3,161)	0
Items of other comprehensive (loss)		(48)
Items of other comprehensive income	48
Currency translation	(58)	191
Total change in net deferred tax assets	$ (2,446)	$ (2,106)

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Balance at January 1	$ 0	$ 178	$ 794
Additions for tax positions of prior years	0	0	0
Reductions for tax positions of prior years	0	0	(616)
Expiration of statutes of limitations	0	(178)	0
Balance at December 31	$ 0	$ 0	$ 178

Share-Based Compensation - Acti

Share-Based Compensation - Activity in Company's Plan (Detail) - 1999 Stock Option Plan [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2017, Number of Shares | shares	5,550
Exercised, Number of Shares | shares	(4,800)
Forfeited, Number of Shares | shares	0
Outstanding (exercisable and vested) at December 31, 2017, Number of Shares | shares	750
Outstanding at January 1, 2017, Weighted Average Exercise Price per Share | $ / shares	$ 48.35
Exercised, Weighted Average Exercise Price per Share | $ / shares	49.79
Forfeited, Weighted Average Exercise Price per Share | $ / shares	0
Outstanding (exercisable and vested) at December 31, 2017, Weighted Average Exercise Price per Share | $ / shares	$ 39.10
Outstanding (exercisable and vested), Weighted Average Remaining Contractual Term	1 year 9 months 18 days
Outstanding (exercisable and vested) Aggregate Intrinsic Value | $	$ 24

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Nov. 30, 2015USD ($)	Dec. 31, 2017USD ($)Deferral$ / sharesshares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	May 10, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted under incentive plan | shares		90,807
Forfeiture of restricted stock based unit | shares		12,304
Deferred shares and held by the rabbi trust | shares		289,026	297,281
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares		900,000
2016 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares					1,000,000
Incentive plan expiry date		May 10, 2026
Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of deferrals | Deferral		2
Long Term Incentive Plan Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, Number of Shares | shares		28,500	500	0
Total intrinsic value of stock options		$ 7,000,000	$ 0
Cash received for the exercise of stock options		1,500,000
Compensation expenses		$ 100,000	$ 200,000	$ 300,000
Granted, Number of Shares | shares		5,000	0	10,500
Weighted-average period		1 year 10 months 24 days
Estimated Forfeitures		$ 0
Weighted average grant date fair value options granted | $ / shares		$ 48
Expected compensation cost related to unvested awards not yet recognized		$ 100,000
Long Term Incentive Plan Stock Option [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 Stock Option [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 Stock Option [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] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received for the exercise of stock options			$ 100,000
Excess tax benefits		$ 100,000	$ 100,000	$ 100,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, Number of Shares | shares		4,800	6,450	0
Total intrinsic value of stock options		$ 100,000	$ 100,000	$ 100,000
Cash received for the exercise of stock options		2,000,000	2,000,000
Compensation expenses		$ 0	0	0
Stock Options [Member] | 2016 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares					100,000
Granted, Number of Shares | shares		5,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares		800,000
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer And Other Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses	$ 600,000
Restricted Stock Units (RSUs) [Member] | 2016 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares					900,000
Restricted shares granted under incentive plan | shares		90,807
Long Term Incentive Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for awards | shares		100,000
Long Term Incentive Stock Option [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 Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option issued under plan vest and expire		5 years
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses		$ 400,000	300,000	300,000
Compensation cost expected to be recognized over period		$ 400,000
Weighted-average period		1 year 9 months 18 days
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period		1 year 9 months 18 days
Performance-based compensation expense (income)		$ 2,700,000	$ 900,000	$ 1,000,000
Performance-Based RSUs [Member] | Grant 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture of restricted stock based unit | shares			40,676
Remaining performance-based compensation expense		3,700,000
Performance-Based RSUs [Member] | Grant 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture of restricted stock based unit | shares				47,832
Service and Performance-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefits from restricted share awards		$ 200,000
Service and Performance-based RSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefits from restricted share awards			$ 100,000	$ 100,000

Share-Based Compensation - Summ

Share-Based Compensation - Summary of RSUs (Detail)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2017	146,142
Granted	90,807
Vested	(5,859)
Forfeited	(12,304)
Nonvested as of December 31, 2017	218,786
Nonvested as of January 1, 2017, Weighted-Average Grant-Date Fair Value | $ / shares	$ 38.46
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	54.60
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	45.85
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	46.86
Nonvested as of December 31, 2017, Weighted-Average Grant- Date Fair Value | $ / shares	$ 52.68
Performance Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2017	130,168
Granted	80,247
Vested	0
Forfeited	(9,843)
Nonvested as of December 31, 2017	200,572
Service Required [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested as of January 1, 2017	15,974
Granted	10,560
Vested	(5,859)
Forfeited	(2,461)
Nonvested as of December 31, 2017	18,214

Share-Based Compensation - Weig

Share-Based Compensation - Weighted-Average Assumptions for Estimating Fair Values (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	2.00%	2.10%
Dividend yield	1.70%	1.60%
Expected life (years)	5 years	5 years
Expected volatility	36.80%	37.90%

Share-Based Compensation - Ac71

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2017, Number of Shares	52,750
Granted, Number of Shares	5,000	0	10,500
Exercised, Number of Shares	(28,500)	(500)	0
Forfeited, Number of Shares	0
Outstanding (vested and expected to vest) at December 31, 2017, Number of Shares	29,250
Exercisable at December 31, 2017, Number of Shares	21,625
Outstanding at January 1, 2017, Weighted Average Exercise Price per Share	$ 54.54
Granted, Weighted Average Exercise Price per Share	48
Exercised, Weighted Average Exercise Price per Share	46.90
Forfeited, Weighted Average Exercise Price per Share	0
Outstanding (vested and expected to vest) at December 31, 2017, Weighted Average Exercise Price per Share	56.84
Exercisable at December 31, 2017, Weighted Average Exercise Price per Share	$ 60.69
Outstanding (vested and expected to vest) at December 31, 2017, Weighted Average Remaining Contractual Term	7 years 1 month 6 days
Exercisable at December 31, 2017, Weighted Average Remaining Contractual Term	6 years 6 months
Outstanding (vested and expected to vest) at December 31, 2017, Aggregate Intrinsic Value	$ 423
Exercisable at December 31, 2017, Aggregate Intrinsic Value	$ 231

Computation of Earnings Per S72

Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator
Net income	$ 702	$ 6,278	$ 4,156	$ 1,518	$ 5,100	$ 4,742	$ 2,755	$ 2,658	$ 12,654	$ 15,255	$ 6,675
Determination of shares (in thousands)
Weighted-average common shares outstanding									5,102	5,166	5,350
Dilutive effect - share-based awards									31	12	16
Diluted weighted-average common shares outstanding									5,133	5,178	5,366
Earnings per common share
Basic	$ 0.14	$ 1.23	$ 0.81	$ 0.30	$ 1	$ 0.92	$ 0.53	$ 0.51	$ 2.48	$ 2.95	$ 1.25
Diluted	$ 0.14	$ 1.23	$ 0.81	$ 0.30	$ 0.99	$ 0.92	$ 0.53	$ 0.51	$ 2.47	$ 2.95	$ 1.24

Computation of Earnings Per S73

Computation of Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from calculation of earnings per share	13,000	56,850	58,350

Goodwill and Other Intangible74

Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-lived intangible assets
Gross Carrying Amount	$ 23,274	$ 22,741
Accumulated Amortization	(13,254)	(12,266)
Indefinite-lived intangible assets Goodwill	16,544	15,769	$ 15,821
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,806	4,816
Accumulated Amortization	(4,791)	(4,799)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,199	1,070
Accumulated Amortization	(201)	(180)
Trademark [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,770	1,725
Accumulated Amortization	(1,166)	(1,039)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	3,149	3,057
Accumulated Amortization	(1,215)	(1,031)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	12,350	12,073
Accumulated Amortization	$ (5,881)	$ (5,217)

Goodwill and Other Intangible75

Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)	Oct. 02, 2017	Oct. 02, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Goodwill impairment adjustment	$ 0	$ 0
Amortization of Intangible Assets			$ 1,000,000	$ 1,000,000	$ 1,200,000
2,018			1,000,000
2,019			1,000,000
2,020			900,000
2,021			900,000
2,022			$ 900,000
Remaining amortization period			16 years 9 months 18 days
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			8 years
Land Use Rights [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			58 years 4 months 24 days
Trademark [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			9 years 1 month 6 days
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			13 years 10 months 24 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			12 years 3 months 18 days
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

Goodwill and Other Intangible76

Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Beginning Balance	$ 15,769	$ 15,821
Currency translation and other		(52)
Currency translation	775
Ending Balance	16,544	15,769
USA [Member]
Goodwill [Line Items]
Beginning Balance	3,078	3,078
Currency translation and other		0
Currency translation	0
Ending Balance	3,078	3,078
The Americas [Member]
Goodwill [Line Items]
Beginning Balance	4,017	3,918
Currency translation and other		99
Currency translation	275
Ending Balance	4,292	4,017
EMEA [Member]
Goodwill [Line Items]
Beginning Balance	1,287	1,301
Currency translation and other		(14)
Currency translation	208
Ending Balance	1,495	1,287
Asia-Pacific [Member]
Goodwill [Line Items]
Beginning Balance	7,387	7,524
Currency translation and other		(137)
Currency translation	292
Ending Balance	$ 7,679	$ 7,387

Fair Value of Financial Asset77

Fair Value of Financial Assets and Liabilities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract]
Fair value liabilities Level 2	$ 0

Fair Value of Financial Asset78

Fair Value of Financial Assets and Liabilities - Fair Value and Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Long-term debt and related current maturities, Fair Value	$ 35,369	$ 43,209
Long-term debt and related current maturities, Carrying Value	$ 36,046	$ 44,391

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)SegmentCustomer	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
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	$ 96,892	$ 99,239	$ 97,512	$ 84,569	$ 86,433	$ 88,299	$ 83,220	$ 78,682	$ 378,212	$ 336,634	$ 354,666
USA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									147,600	135,300	$ 142,500
Long-lived assets	$ 53,200				$ 54,000				$ 53,200	$ 54,000

Segment Information - Summary o

Segment Information - Summary of Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales
Net sales	$ 96,892	$ 99,239	$ 97,512	$ 84,569	$ 86,433	$ 88,299	$ 83,220	$ 78,682	$ 378,212	$ 336,634	$ 354,666
Interest income
Interest income									430	291	391
Interest expense
Interest expense									(1,061)	(844)	(565)
Income taxes
Income taxes									13,152	5,698	5,031
Net income (loss)
Net income (loss)	702	$ 6,278	$ 4,156	$ 1,518	5,100	$ 4,742	$ 2,755	$ 2,658	12,654	15,255	6,675
Expenditure for long-lived assets
Expenditure for long-lived assets									11,233	24,725	10,754
Depreciation and amortization
Depreciation and amortization									12,790	11,996	11,532
Identifiable assets
Identifiable assets	359,785				340,937				359,785	340,937
Operating Segments [Member] | PLP-USA [Member]
Net sales
Net sales									147,646	135,260	142,470
Interest income
Interest income									0	0	0
Interest expense
Interest expense									(941)	(738)	(440)
Income taxes
Income taxes									7,142	1,494	2,387
Net income (loss)
Net income (loss)									(2,367)	2,007	2,031
Expenditure for long-lived assets
Expenditure for long-lived assets									4,474	18,314	5,164
Depreciation and amortization
Depreciation and amortization									5,389	4,937	4,551
Identifiable assets
Identifiable assets	116,484				122,326				116,484	122,326
Long-lived assets
Long-lived assets	53,211				54,048				53,211	54,048
Operating Segments [Member] | The Americas [Member]
Net sales
Net sales									69,764	60,049	59,290
Interest income
Interest income									283	79	145
Interest expense
Interest expense									(10)	(14)	(56)
Income taxes
Income taxes									3,593	2,507	1,399
Net income (loss)
Net income (loss)									8,169	5,881	3,178
Expenditure for long-lived assets
Expenditure for long-lived assets									1,272	2,634	2,074
Depreciation and amortization
Depreciation and amortization									1,985	1,874	1,862
Identifiable assets
Identifiable assets	70,720				63,643				70,720	63,643
Long-lived assets
Long-lived assets	16,365				16,158				16,365	16,158
Operating Segments [Member] | EMEA [Member]
Net sales
Net sales									63,916	56,411	53,778
Interest income
Interest income									47	116	123
Interest expense
Interest expense									(31)	(13)	(23)
Income taxes
Income taxes									1,583	1,862	1,646
Net income (loss)
Net income (loss)									4,088	6,243	4,881
Expenditure for long-lived assets
Expenditure for long-lived assets									2,329	1,450	1,673
Depreciation and amortization
Depreciation and amortization									1,678	1,402	1,464
Identifiable assets
Identifiable assets	62,524				54,493				62,524	54,493
Long-lived assets
Long-lived assets	12,971				10,619				12,971	10,619
Operating Segments [Member] | Asia-Pacific [Member]
Net sales
Net sales									96,886	84,914	99,128
Interest income
Interest income									100	96	123
Interest expense
Interest expense									(79)	(79)	(46)
Income taxes
Income taxes									834	(165)	(401)
Net income (loss)
Net income (loss)									2,764	1,124	(3,415)
Expenditure for long-lived assets
Expenditure for long-lived assets									3,158	2,327	1,843
Depreciation and amortization
Depreciation and amortization									3,738	3,783	3,655
Identifiable assets
Identifiable assets	110,057				100,475				110,057	100,475
Long-lived assets
Long-lived assets	26,051				24,279				26,051	24,279
Segment Reconciling Items [Member]
Net sales
Net sales									378,212	336,634	354,666
Interest income
Interest income									430	291	391
Interest expense
Interest expense									(1,061)	(844)	(565)
Income taxes
Income taxes									13,152	5,698	5,031
Net income (loss)
Net income (loss)									12,654	15,255	6,675
Expenditure for long-lived assets
Expenditure for long-lived assets									11,233	24,725	10,754
Depreciation and amortization
Depreciation and amortization									12,790	11,996	11,532
Long-lived assets
Long-lived assets	$ 108,598				$ 105,104				108,598	105,104
Intersegment Eliminations [Member]
Intersegment sales
Intersegment sales									27,520	23,793	24,429
Intersegment Eliminations [Member] | PLP-USA [Member]
Intersegment sales
Intersegment sales									12,234	9,471	9,339
Intersegment Eliminations [Member] | The Americas [Member]
Intersegment sales
Intersegment sales									5,570	5,132	5,074
Intersegment Eliminations [Member] | EMEA [Member]
Intersegment sales
Intersegment sales									1,120	1,363	1,652
Intersegment Eliminations [Member] | Asia-Pacific [Member]
Intersegment sales
Intersegment sales									$ 8,596	$ 7,827	$ 8,364

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)

Dec. 13, 2017$ / sharesshares

Nov. 30, 2017$ / sharesshares

Nov. 17, 2017$ / sharesshares

Nov. 08, 2017$ / sharesshares

Aug. 16, 2017$ / sharesshares

May 09, 2017$ / sharesshares

Jan. 03, 2017$ / sharesshares

Dec. 29, 2016$ / sharesshares

Aug. 23, 2016$ / sharesshares

Dec. 08, 2015$ / sharesshares

Nov. 30, 2015$ / sharesshares

Aug. 11, 2015$ / sharesshares

Mar. 26, 2015$ / sharesshares

Dec. 31, 2017USD ($)Lease

Dec. 31, 2016USD ($)Lease$ / sharesshares

Dec. 31, 2015USD ($)Lease

Related Party Transaction [Line Items]

Related party transactions number of property leased | Lease

1

2

2

Related party transaction lease expenses | $

$ 300,000

$ 300,000

Maximum [Member]

Related Party Transaction [Line Items]

Related party transaction lease expenses | $

$ 100,000

Officers and Other Employees [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

7,975

24,874

7,703

Shares price per share | $ / shares

$ 74.51

$ 71.07

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

30 days

30 days

30 days

Officers and Other Employees [Member] | Minimum [Member]

Related Party Transaction [Line Items]

Shares price per share | $ / shares

$ 42.10

Officers and Other Employees [Member] | Maximum [Member]

Related Party Transaction [Line Items]

Shares price per share | $ / shares

$ 45.20

Retired Officer [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

3,334

Shares price per share | $ / shares

$ 75.37

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

30 days

Officer [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

2,500

1,834

Shares price per share | $ / shares

$ 52.05

$ 58.58

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

30 days

30 days

Trust [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

15,000

24,920

27,448

30,713

Shares price per share | $ / shares

$ 78.68

$ 50.16

$ 44.66

$ 35

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

30 days

30 days

30 days

30 days

Robert G Ruhlman [Member]

Related Party Transaction [Line Items]

Purchase of shares | shares

7,000

5,000

1,510

1,479

1,290

Shares price per share | $ / shares

$ 71.07

$ 56.38

$ 40.83

$ 41.50

$ 45.39

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

30 days

30 days

30 days

30 days

30 days

Ryan Ruhlman [Member]

Related Party Transaction [Line Items]

Compensation payment received | $

$ 189,870

Ryan Ruhlman employee years of service

12 years

Compensation attributable to stock option | $

$ 33,725

X Information Technology [Member]

Related Party Transaction [Line Items]

Service expense | $

200,000

$ 200,000

100,000

Flex Work Sp [Member]

Related Party Transaction [Line Items]

Labor expense | $

$ 200,000

$ 400,000

$ 400,000

Ownership percentage owned by related party

50.00%

Baker & Hostetler LLP [Member]

Related Party Transaction [Line Items]

Legal fees | $

$ 100,000

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period balance	$ 1,058	$ 714	$ 892
Additions charged to costs and expenses	347	649	74
Warranty usage	(399)	(269)	(158)
Currency translation	70	(36)	(94)
End of period balance	$ 1,076	$ 1,058	$ 714

Quarterly Financial Informati83

Quarterly Financial Information - Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Net sales	$ 96,892	$ 99,239	$ 97,512	$ 84,569	$ 86,433	$ 88,299	$ 83,220	$ 78,682	$ 378,212	$ 336,634	$ 354,666
Gross profit	30,755	33,535	29,673	24,665	29,464	28,855	26,806	24,289	118,628	109,414	103,452
Income before income taxes	7,691	9,739	6,258	2,118	6,990	6,534	3,773	3,656	25,806	20,953	11,706
Net income	$ 702	$ 6,278	$ 4,156	$ 1,518	$ 5,100	$ 4,742	$ 2,755	$ 2,658	$ 12,654	$ 15,255	$ 6,675
Net income, basic	$ 0.14	$ 1.23	$ 0.81	$ 0.30	$ 1	$ 0.92	$ 0.53	$ 0.51	$ 2.48	$ 2.95	$ 1.25
Net income, diluted	$ 0.14	$ 1.23	$ 0.81	$ 0.30	$ 0.99	$ 0.92	$ 0.53	$ 0.51	$ 2.47	$ 2.95	$ 1.24

Charges Related to Restructur84

Charges Related to Restructuring Activities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015Operation
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0
Restructuring liability related to lease termination costs	439	$ 478
Lease Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Restructuring liability related to lease termination costs	415	478
Infrastructure and Manufacturing Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 100
Maximum [Member] | Infrastructure and Manufacturing Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 100
Asia-Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Number of reconfigured operations | Operation			1

Charges Related to Restructur85

Charges Related to Restructuring Activities - Summary by Reporting Segment of Accruals as a Result of Restructuring (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
December 31, 2016 Balance	$ 478
Charges	0
Payments and other adjustments	(39)
December 31, 2017 Balance	439
Severance [Member]
Restructuring Cost and Reserve [Line Items]
December 31, 2016 Balance	0
Charges	0
Payments and other adjustments	0
December 31, 2017 Balance	0
Lease Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
December 31, 2016 Balance	478
Charges	0
Payments and other adjustments	(63)
December 31, 2017 Balance	415
Asset Disposals [Member]
Restructuring Cost and Reserve [Line Items]
December 31, 2016 Balance	0
Charges	0
Payments and other adjustments	0
December 31, 2017 Balance	0
Other [Member]
Restructuring Cost and Reserve [Line Items]
December 31, 2016 Balance	0
Charges	0
Payments and other adjustments	24
December 31, 2017 Balance	$ 24

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 2,815	$ 1,871	$ 1,943
Additions charged to costs and expenses	472	1,809	524
Deductions	(432)	(864)	(414)
Other additions or deductions	55	(1)	(182)
Balance at end of period	2,910	2,815	1,871
Reserve for Credit Memos [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	395	455	428
Additions charged to costs and expenses	693	(674)	437
Deductions	(675)		(408)
Deductions		613
Other additions or deductions	2	1	(2)
Balance at end of period	415	395	455
Slow-Moving and Obsolete Inventory Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	11,560	10,230	9,183
Additions charged to costs and expenses	998	2,825	2,477
Deductions	(3,855)	(1,408)	(1,509)
Other additions or deductions	363	(87)	79
Balance at end of period	9,066	11,560	10,230
Accrued Product Warranty [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,058	714	892
Additions charged to costs and expenses	347	649	74
Deductions	(399)	(269)	(158)
Other additions or deductions	70	(36)	(94)
Balance at end of period	1,076	1,058	714
Foreign Net Operating Loss Tax Carryforwards [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,805	5,209	3,614
Additions charged to costs and expenses	490	346	2,105
Deductions	(312)	(1,175)	(287)
Other additions or deductions	(18)	(575)	(223)
Balance at end of period	$ 3,965	$ 3,805	$ 5,209