Materion (MTRN) 10-Q 25 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 28, 2018shares
Document and Entity Information [Abstract]
Entity Registrant Name	MATERION Corp
Entity Central Index Key	1,104,657
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 28, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	MTRN
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding	20,244,285

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Income Statement [Abstract]
Net sales	$ 297,193	$ 294,268	$ 909,745	$ 830,779
Cost of sales	232,258	238,821	724,692	677,398
Gross margin	64,935	55,447	185,053	153,381
Selling, general, and administrative expense	38,872	36,253	115,807	107,702
Research and development expense	4,250	3,429	11,753	10,103
Other net	3,147	3,801	10,384	9,823
Operating profit	18,666	11,964	47,109	25,753
Interest expense—net	613	533	2,010	1,721
Other non-operating expense - net	800	406	1,679	1,041
Income before income taxes	17,253	11,025	43,420	22,991
Income tax (benefit) expense	(2,713)	1,705	1,746	3,308
Net income	$ 19,966	$ 9,320	$ 41,674	$ 19,683
Basic earnings per share:
Net income per share of common stock (in dollars per share)	$ 0.99	$ 0.47	$ 2.06	$ 0.98
Diluted earnings per share:
Net income per share of common stock (in dollars per share)	0.97	0.46	2.02	0.97
Cash dividends per share (in dollars per share)	$ 0.105	$ 0.1	$ 0.31	$ 0.295
Weighted-average number of shares of common stock outstanding:
Basic (in shares)	20,241	20,040	20,199	20,007
Diluted (in shares)	20,648	20,411	20,607	20,361

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 19,966	$ 9,320	$ 41,674	$ 19,683
Other comprehensive income (loss):
Foreign currency translation adjustment	116	271	285	1,649
Derivative and hedging activity, net of tax	125	(120)	1,213	(755)
Pension and post-employment benefit adjustment, net of tax	1,507	881	4,081	2,397
Net current period other comprehensive income (loss) after tax	1,748	1,032	5,579	3,291
Comprehensive income	$ 21,714	$ 10,352	$ 47,253	$ 22,974

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 53,612	$ 41,844
Accounts receivable	133,894	124,014
Inventories	199,913	220,352
Prepaid and other current assets	19,894	24,733
Total current assets	407,313	410,943
Deferred income taxes	22,311	17,047
Property, plant, and equipment	896,626	891,789
Less allowances for depreciation, depletion, and amortization	(642,931)	(636,211)
Property, plant, and equipment—net	253,695	255,578
Intangible assets—net	7,156	9,847
Other assets	7,114	6,992
Goodwill	90,762	90,677
Total Assets	788,351	791,084
Current liabilities
Short-term debt	807	777
Accounts payable	42,712	49,059
Salaries and wages	38,160	42,694
Other liabilities and accrued items	28,934	28,044
Income taxes	8,176	1,084
Unearned revenue	7,805	5,451
Total current liabilities	126,594	127,109
Other long-term liabilities	13,828	14,895
Capital lease obligations	15,864	16,072
Retirement and post-employment benefits	56,068	93,225
Unearned income	33,649	36,905
Long-term income taxes	3,064	4,857
Deferred income taxes	210	213
Long-term debt	2,331	2,827
Serial preferred stock (no par value; 5,000 authorized shares, none issued)	0	0
Common stock (no par value; 60,000 authorized shares, issued shares of 27,148 at September 28 and December 31)	232,846	223,484
Retained earnings	571,350	536,116
Common stock in treasury (6,904 shares at September 28 and 7,042 shares at December 31)	(174,532)	(166,128)
Accumulated other comprehensive loss	(97,358)	(102,937)
Other equity transactions	4,437	4,446
Total shareholders' equity	536,743	494,981
Total Liabilities and Shareholders’ Equity	$ 788,351	$ 791,084

Consolidated Balance Sheets Con

Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands, $ / shares in Thousands	Sep. 28, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Serial preferred stock, par value (in dollars per share)	$ 0	$ 0
Serial preferred stock, shares authorized	5,000	5,000
Serial preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	60,000	60,000
Common stock, shares, issued	27,148	27,148
Treasury stock, shares	6,904	7,042

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017
Cash flows from operating activities:
Net income	$ 41,674	$ 19,683
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	26,506	33,444
Amortization of deferred financing costs in interest expense	720	670
Non-cash compensation expense	8,965	7,958
Deferred income tax expense	(5,341)	1,073
Changes in assets and liabilities net of acquired assets and liabilities:
Decrease (increase) in accounts receivable	(10,274)	(21,572)
Decrease (increase) in inventories	19,754	(9,953)
Decrease (increase) in prepaid and other current assets	4,648	(6,077)
Increase (decrease) in accounts payable and accrued expenses	(10,290)	17,991
Increase (Decrease) in Unearned Revenue	2,365	4,746
Increase (decrease) in interest and taxes payable	5,557	(2,083)
Domestic pension plan contributions	(38,000)	(8,000)
Other-net	2,959	(2,383)
Net cash used in operating activities	49,243	35,497
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(21,809)	(17,759)
Payments for mine development	(5,192)	(620)
Payments for acquisition	0	(16,504)
Proceeds from sale of property, plant, and equipment	26	53
Net cash used in investing activities	(26,975)	(34,830)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	55,000
Repayment of long-term debt	(513)	(55,608)
Principal payments under capital lease obligations	(573)	(644)
Cash dividends paid	(6,262)	(5,903)
Deferred financing costs	0	(300)
Repurchase of common stock	0	(1,086)
Payments of withholding taxes for stock-based compensation awards	(3,006)	(2,397)
Net cash (used in) provided by financing activities	(10,354)	(10,938)
Effects of exchange rate changes	(146)	1,293
Net change in cash and cash equivalents	11,768	(8,978)
Cash and cash equivalents at beginning of period	41,844	31,464
Cash and cash equivalents at end of period	$ 53,612	$ 22,486

Accounting Policies

Accounting Policies	9 Months Ended
	Sep. 28, 2018
Accounting Policies [Abstract]
Accounting Policies	Accounting Policies Basis of Presentation: In management’s opinion, the accompanying consolidated financial statements of Materion Corporation and its subsidiaries (referred to herein as the Company, our, we, or us) contain all of the adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods reported. All adjustments were of a normal and recurring nature. Certain amounts in prior periods have been reclassified to conform to the 2018 consolidated financial statement presentation. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company's 2017 Annual Report on Form 10-K. The interim period results are not necessarily indicative of the results to be expected for the full year. New Pronouncements Adopted: In March 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which requires an employer to report the service cost component of net benefit cost in the same line item as other compensation costs arising from services rendered by pertinent employees during the period. This ASU requires non-service cost components of net benefit cost to be presented in a caption below the Company's Operating profit and allows only the service cost component to be eligible for capitalization. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods, with early adoption permitted. The Company adopted the new standard as of January 1, 2018 and applied its amendments retrospectively for the presentation of service cost and other components of net benefit cost on the income statement and prospectively for the capitalization of service cost and net periodic postretirement benefits in assets. The application of ASU 2017-07 resulted in an increase to Operating profit of $0.4 million and $1.0 million for the third quarter and first nine months of 2017, respectively, which was offset by a corresponding increase in Other non-operating expense, net. The adoption of this ASU did not have a material effect on the Company's financial condition or liquidity. The Company utilized this ASU's practical expedient, which permits the Company to use the amounts disclosed in its Pensions and Other Post-employment Benefits note for the prior comparative periods as the estimation basis for applying the retrospective presentation requirements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (ASC 606), which supersedes previous revenue recognition guidance. The Company adopted the new standard using the modified retrospective method as of January 1, 2018. Prior periods were not retrospectively adjusted. This approach was applied to all contracts not completed as of January 1, 2018. The new standard primarily impacted the Company's timing of revenue recognition for certain contracts and subcontracts with the United States (U.S.) government that contain termination for convenience clauses, and due to the cumulative impact of adopting ASC 606, the Company recorded a reduction to beginning retained earnings of $0.4 million, net of tax as summarized below: (Thousands) December 31, 2017 Adjustments due to ASC 606 January 1, 2018 Assets Unbilled receivables $ — $ 2,658 $ 2,658 Inventories 220,352 (2,059 ) 218,293 Liabilities and Shareholders’ Equity Other liabilities and accrued items $ 28,044 61 28,105 Deferred income taxes 213 113 326 Retained earnings 536,116 425 536,541 The adoption of the standard did not have a material impact to the Company's consolidated financial statements. Refer to Note B for additional disclosures relating to ASC 606. New Pronouncements Issued: In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , which amends and simplifies existing guidance to allow companies to more accurately present the economic effects of risk management activities in the financial statements. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods, with early adoption permitted. The Company is currently evaluating the impact of adopting this new guidance on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases , which eliminates the off-balance-sheet accounting for leases. The new guidance will require lessees to report their operating leases as both an asset and liability on the balance sheet and disclose key information about leasing arrangements. This ASU is required to be applied using a modified retrospective adoption method with the option of applying the guidance either retrospectively to each prior comparative reporting period presented or retrospectively at the beginning of the period of adoption. Early adoption is permitted. The Company will adopt this ASU on January 1, 2019 and will apply it retrospectively at the beginning of the period of adoption through a cumulative-effect adjustment to retained earnings. The Company will elect to apply the practical expedients that do not require reassessment of existing contracts for embedded leases or to reassess lease classification or initial direct costs. In preparation for the adoption, the Company, along with an outside consultant, has executed on its project plan to identify a complete lease population, analyze lease agreements, and evaluate technology solutions. The Company selected and began implementing a new lease management system during the third quarter of 2018. Once the transition to the new system is completed, this software will enable us to quantify the full impact this ASU will have on our consolidated financial statements. No other recently issued or effective ASUs had, or are expected to have, a material effect on the Company's results of operations, financial condition, or liquidity.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 28, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition Net sales consist primarily of revenue from the sale of precious and non-precious specialty metals, beryllium and copper-based alloys, beryllium composites, and other products into numerous end markets. The Company requires an agreement with a customer that creates enforceable rights and performance obligations. The Company generally recognizes revenue, in an amount that reflects the consideration to which it expects to be entitled, upon satisfaction of a performance obligation by transferring control over a product to the customer. Control over the product is generally transferred to the customer when the Company has a present right to payment, the customer has legal title, the customer has physical possession, the customer has the significant risks and rewards of ownership, and/or the customer has accepted the product. Shipping and Handling Costs : The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill our promise to transfer the associated products. Accordingly, customer payments of shipping and handling costs are recorded as a component of net sales, and related costs are recorded as a component of cost of sales. Taxes Collected from Customers and Remitted to Governmental Authorities : Revenue is recorded net of taxes collected from customers that are remitted to governmental authorities, with the collected taxes recorded as current liabilities until remitted to the relevant government authority. Product Warranty : Substantially all of the Company’s customer contracts contain a warranty that provides assurance that the purchased product will function as expected and in accordance with certain specifications. The warranty is intended to safeguard the customer against existing defects and does not provide any incremental service to the customer. Transaction Price Allocated to Future Performance Obligations: ASC 606 requires that the Company disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied at September 28, 2018. Remaining performance obligations include noncancelable purchase orders and customer contracts. The guidance provides certain practical expedients that limit this requirement. As such, the Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less. After considering the practical expedient, at September 28, 2018, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $33.0 million , of which $4.0 million will be recognized in 2018. Contract Costs : The Company recognizes the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that the Company otherwise would have recognized is one year or less. These costs primarily relate to sales commissions, which are included in selling, general, and administrative expenses. Contract Balances : The timing of revenue recognition, billings and cash collections resulted in the following contract assets and contract liabilities: (Thousands) September 28, 2018 January 1, 2018 $ change % change Accounts receivable, trade $ 126,537 $ 122,393 $ 4,144 3 % Unbilled receivables 6,383 2,658 3,725 140 % Unearned revenue 7,805 5,451 2,354 43 % Accounts receivable, trade represents payments due from customers relating to the transfer of the Company’s products and services. The Company believes that its receivables are collectible and appropriate allowances for doubtful accounts have been recorded. Impairment losses (bad debt) incurred relating to our receivables were immaterial during the third quarter and first nine months of 2018. Unbilled receivables represent expenditures on contracts, plus applicable profit margin, not yet billed. Unbilled receivables are normally billed and collected within one year. Billings made on contracts are recorded as a reduction of unbilled receivables. Unearned revenue is recorded for consideration received from customers in advance of satisfaction of the related performance obligations. As a practical expedient, the Company does not adjust the promised amount of consideration for the effects of a significant financing component because the period between the transfer of a product or service to a customer and when the customer pays for that product or service will be one year or less. The Company does not include extended payment terms in its contracts with customers.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 28, 2018
Business Combinations [Abstract]
Acquisition Disclosure	Acquisitions On February 28, 2017, the Company acquired the target materials business of the Heraeus Group (HTB), of Hanau, Germany, for $16.5 million . This business manufactures precious and non-precious metal target materials for the architectural and automotive glass, electronic display, photovoltaic, and semiconductor markets at facilities in Germany, Taiwan, and the United States. This business operates within the Advanced Materials segment, and the results of operations are included as of the date of acquisition. The final purchase price allocation for the acquisition is as follows: (Thousands) Amount Assets: Inventories $ 7,221 Prepaid and other current assets 2,270 Long-term deferred income taxes 14 Property, plant, and equipment 6,501 Intangible assets 3,649 Goodwill 3,574 Total assets acquired $ 23,229 Liabilities: Other liabilities and accrued items $ 984 Other long-term liabilities 449 Retirement and post-employment benefits 5,292 Total liabilities assumed $ 6,725 Total purchase price $ 16,504 No material measurement period adjustments were recorded upon finalizing the purchase price allocation in the first quarter of 2018.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 28, 2018
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company has the following reportable segments: Performance Alloys and Composites, Advanced Materials, Precision Coatings, and Other. The Company’s reportable segments represent components of the Company for which separate financial information is available that is utilized on a regular basis by the Chief Executive Officer, the Company's Chief Operating Decision Maker, in determining how to allocate the Company’s resources and evaluate performance. Performance Alloys and Composites produces strip and bulk form alloy products, strip metal products with clad inlay and overlay metals, beryllium-based metals, beryllium, and aluminum metal matrix composites, in rod, sheet, foil, and a variety of customized forms, beryllia ceramics, and bulk metallic glass materials. Advanced Materials produces advanced chemicals, microelectric packaging, precious metal, non-precious metal, and specialty metal products, including vapor deposition targets, frame lid assemblies, clad and precious metal preforms, high temperature braze materials, and ultra-fine wire. Precision Coatings produces thin film coatings, optical filter materials, sputter-coated, and precision-converted thin film materials. The Other reportable segment includes unallocated corporate costs and assets. (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Third Quarter 2018 Net sales $ 124,103 $ 144,072 $ 29,018 $ — $ 297,193 Intersegment sales 2 13,265 — — 13,267 Operating profit (loss) 16,728 6,882 3,499 (8,443 ) 18,666 Third Quarter 2017 Net sales $ 109,393 $ 157,770 $ 27,105 $ — $ 294,268 Intersegment sales 54 12,814 — — 12,868 Operating profit (loss) 6,786 9,756 1,613 (6,191 ) 11,964 First Nine Months 2018 Net sales $ 372,104 $ 447,941 $ 89,700 $ — $ 909,745 Intersegment sales 33 36,317 — — 36,350 Operating profit (loss) 38,898 18,352 9,107 (19,248 ) 47,109 First Nine Months 2017 Net sales $ 310,487 $ 429,550 $ 90,742 $ — $ 830,779 Intersegment sales 113 42,508 — — 42,621 Operating profit (loss) 12,523 24,873 6,145 (17,788 ) 25,753 The following table disaggregates revenue for each segment by end market for the third quarter and first nine months of 2018: (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Third Quarter 2018 End Market Consumer Electronics $ 24,966 $ 78,859 $ 4,733 $ — $ 108,558 Industrial Components 24,745 11,406 2,855 — 39,006 Energy 11,146 20,301 4 — 31,451 Automotive Electronics 21,681 — 530 — 22,211 Defense 11,430 3,761 5,503 — 20,694 Medical 1,862 4,448 15,261 — 21,571 Telecom Infrastructure 9,845 6,664 — — 16,509 Other 18,428 18,633 132 — 37,193 Total $ 124,103 $ 144,072 $ 29,018 $ — $ 297,193 First Nine Months 2018 End Market Consumer Electronics $ 76,793 $ 249,139 $ 14,047 $ — $ 339,979 Industrial Components 78,291 36,206 8,247 — 122,744 Energy 29,152 60,048 12 — 89,212 Automotive Electronics 60,530 — 1,221 — 61,751 Defense 32,984 11,599 14,705 — 59,288 Medical 5,421 13,569 48,786 — 67,776 Telecom Infrastructure 28,829 21,989 59 — 50,877 Other 60,104 55,391 2,623 — 118,118 Total $ 372,104 $ 447,941 $ 89,700 $ — $ 909,745 Intersegment sales are eliminated in consolidation.

Other-net

Other-net	9 Months Ended
	Sep. 28, 2018
Other Income and Expenses [Abstract]
Other-net	Other-net Other-net expense for the third quarter and first nine months of 2018 and 2017 is summarized as follows: Third Quarter Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Metal consignment fees $ 2,503 $ 2,436 $ 7,520 $ 6,183 Amortization of intangible assets 524 1,179 1,858 3,456 Foreign currency loss (gain) 140 (201 ) 1,359 (794 ) Fixed asset impairment — 114 — 314 Cost reduction initiatives — 189 — 189 Net loss on disposal of fixed assets 14 60 37 207 Sublease income (119 ) (28 ) (378 ) (83 ) Other items 85 52 (12 ) 351 Total $ 3,147 $ 3,801 $ 10,384 $ 9,823

Income Taxes

Income Taxes	9 Months Ended
	Sep. 28, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the Tax Cuts and Jobs Act (TCJA) was signed into law. The TCJA includes a number of provisions, including: (1) the lowering of the U.S. corporate tax rate from 35% to 21% ; (2) elimination of the corporate alternative minimum tax (AMT); (3) the creation of the base erosion anti-abuse tax (BEAT, a new minimum tax); (4) a general elimination of the U.S. federal income taxes on dividends from foreign subsidiaries; (5) a new provision designed to tax global intangible low-taxed income (GILTI), which allows for the possibility of using foreign tax credits (FTCs) and a deduction of up to 50% to offset the income tax liability (subject to some limitations); (6) a new limitation on deductible interest expense; (7) the repeal of the domestic production activity deduction; and (8) limitations on the deductibility of certain executive compensation. The Company recorded an income tax benefit of $2.7 million in the third quarter of 2018, resulting in an effective tax rate of (15.7)% against income before income taxes, and income tax expense of $1.7 million in the third quarter of 2017, resulting in an effective tax rate of 15.5% against income before income taxes. In the first nine months of 2018, income tax expense of $1.7 million was calculated using an effective tax rate of 4.0% , while income tax expense of $3.3 million in the first nine months of 2017 was calculated using an effective tax rate of 14.4% . In the third quarter and first nine months of 2018, income tax expense differed from the U.S. Federal statutory income tax rate of 21% primarily due to the impact of foreign losses in jurisdictions that will not result in tax benefits, percentage depletion, the U.S. research and development credit, the new GILTI income inclusion, the new executive compensation limitations, and discrete income tax benefits of $6.1 million and $7.1 million recorded in the third quarter and first nine months of 2018, respectively. The $6.1 million of discrete income tax benefits recorded in the third quarter of 2018 were comprised of a $7.4 million benefit for the partial reversal of a $9.5 million valuation allowance related to foreign tax credits that were deemed unrealizable as of December 31, 2017, and a $2.4 million benefit for the re-measurement of certain deferred tax assets and liabilities. These benefits were offset by $2.2 million of expense for a valuation allowance related to deferred tax assets that are not likely to be realized for one of the Company's controlled foreign corporations, and a $1.5 million 2017 U.S. Federal income tax return to provision expense adjustment. The $1.0 million discrete income tax benefit recorded in the first six months of 2018 consisted of $0.4 million of excess tax benefits related to share based payment transactions and a $0.6 million benefit attributable to the re-measurement of certain deferred tax assets and liabilities. The Company does not expect to incur a new BEAT minimum tax or an interest expense limitation. In the third quarter and first nine months of 2017, income tax expense differed from the U.S Federal statutory income tax rate of 35% primarily due to the impact of percentage depletion, foreign rate differential, the U.S. research and development credit, and discrete income tax benefits of $0.5 million and $1.3 million , respectively, related to the reversal of uncertain tax positions due to a lapse in the statute of limitations and the adoption of ASU 2016-09, Improvements to Employee Share-based Payment Accounting. As disclosed in Note G - Income Taxes in the Company's 2017 Annual Report on Form 10-K, the Company was able to reasonably estimate certain TCJA effects and, therefore, recorded provisional adjustments associated with the deemed repatriation transition tax and remeasurement of certain deferred tax asset and liabilities. As of the third quarter of 2018, the Company recorded a measurement period tax expense adjustment of $1.2 million related to the transition tax and a $2.4 million tax benefit related to the re-measurement of certain deferred tax assets and liabilities. The Company’s accounting for the income tax effects of the TCJA continue to be provisional and the company expects to record the final measurement period adjustment in the fourth quarter of 2018. The Company continues to refine the additional measurement-period adjustments related to the transition tax post September 30, 2018 because the total post 1986 earnings and profits (E&P) for its foreign subsidiaries has not yet been completed. The Company is continuing to gather additional information and will complete its accounting for these items in the fourth quarter of 2018. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax, or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. The Company was able to reasonably estimate the remeasurement of certain deferred tax asset and liabilities at an initial provisional amount of $5.0 million of additional income tax expense for the year ended December 31, 2017. The Company made refinements to the calculation during 2018, primarily as a result of information gathered during the preparation of the 2017 U.S. Federal income tax return, leaving a remaining provisional amount of $2.0 million at the end of the third quarter of 2018. The Company is continuing to gather additional information and expects to complete its accounting for these items in the fourth quarter of 2018. Due to the complexity of the new GILTI tax rules, the Company is continuing to evaluate this provision of the TCJA and the application of the Accounting Standards Codification 740, Income Taxes . Under U.S. GAAP, the Company is allowed to make an accounting policy choice of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the period cost method) or (2) factoring such amounts into the Company's measurement of its deferred taxes (the deferred method). The Company's selection of an accounting policy related to the new GILTI tax rules will depend on a number of different aspects of the estimated long-term effects of this provision under the TCJA. Therefore, the Company has not recorded any potential deferred tax effects related to the GILTI in the financial statements and has not made a policy decision regarding whether to record deferred taxes on GILTI or use the period cost method. However, the Company has included an estimate of the 2018 current GILTI impact in the annual effective tax rate for 2018.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 28, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share (EPS) The following table sets forth the computation of basic and diluted EPS: Third Quarter Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands, except per share amounts) 2018 2017 2018 2017 Numerator for basic and diluted EPS: Net income $ 19,966 $ 9,320 $ 41,674 $ 19,683 Denominator: Denominator for basic EPS: Weighted-average shares outstanding 20,241 20,040 20,199 20,007 Effect of dilutive securities: Stock appreciation rights 168 149 183 148 Restricted stock units 86 94 84 95 Performance-based restricted stock units 153 128 141 111 Diluted potential common shares 407 371 408 354 Denominator for diluted EPS: Adjusted weighted-average shares outstanding 20,648 20,411 20,607 20,361 Basic EPS $ 0.99 $ 0.47 $ 2.06 $ 0.98 Diluted EPS $ 0.97 $ 0.46 $ 2.02 $ 0.97 Securities totaling 65,112 and 219,292 for the quarters ended September 28, 2018 and September 29, 2017 , respectively, and 65,112 and 370,917 for the nine months ended September 28, 2018 and September 29, 2017, respectively, were excluded from the dilution calculation as their effect would have been anti-dilutive.

Inventories

Inventories	9 Months Ended
	Sep. 28, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories on the Consolidated Balance Sheets are summarized as follows: Sept. 28, December 31, (Thousands) 2018 2017 Raw materials and supplies $ 37,438 $ 42,958 Work in process 176,792 187,719 Finished goods 35,660 34,418 Subtotal $ 249,890 $ 265,095 Less: LIFO reserve balance 49,977 44,743 Inventories $ 199,913 $ 220,352 The liquidation of last in, first out (LIFO) inventory layers increased cost of sales by $0.2 million in the third quarter and $0.3 million in the first nine months of 2018. LIFO liquidation had no impact to cost of sales in the third quarter of 2017 and caused a $0.2 million increase to cost of sales in the first nine months of 2017.

Pensions and Other Post-employm

Pensions and Other Post-employment Benefits	9 Months Ended
	Sep. 28, 2018
Retirement Benefits [Abstract]
Pensions and Other Post-employment Benefits	Pensions and Other Post-employment Benefits The following is a summary of the net periodic benefit cost for the third quarter and first nine months of 2018 and 2017 for the domestic pension plans (which include the defined benefit pension plan and the supplemental retirement plans) and the domestic retiree medical plan. Pension Benefits Other Benefits Third Quarter Ended Third Quarter Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Components of net periodic benefit cost (benefit) Service cost $ 1,674 $ 1,813 $ 27 $ 23 Interest cost 2,397 2,372 99 99 Expected return on plan assets (3,697 ) (3,385 ) — — Amortization of prior service benefit (31 ) (42 ) (374 ) (374 ) Amortization of net loss 1,959 1,623 — — Net periodic benefit cost (benefit) $ 2,302 $ 2,381 $ (248 ) $ (252 ) Settlements 359 — — — Total net benefit cost $ 2,661 $ 2,381 $ (248 ) $ (252 ) Pension Benefits Other Benefits Nine Months Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Components of net periodic benefit cost (benefit) Service cost $ 5,022 $ 5,309 $ 83 $ 69 Interest cost 7,191 7,098 297 297 Expected return on plan assets (11,091 ) (10,128 ) — — Amortization of prior service benefit (92 ) (236 ) (1,123 ) (1,122 ) Amortization of net loss 5,878 4,821 — — Net periodic benefit cost (benefit) $ 6,908 $ 6,864 $ (743 ) $ (756 ) Settlements 359 — — — Total net benefit cost $ 7,267 $ 6,864 $ (743 ) $ (756 ) The Company made contributions to the domestic defined benefit pension plan of $38.0 million and $8.0 million in the first nine months of 2018 and 2017 , respectively. The Company currently anticipates 2018 contributions of approximately $42.0 million in the aggregate. Beginning in 2018, the Company reports the service cost component of net periodic benefit cost in the same line item as other compensation costs in operating expenses and the non-service cost components of net periodic benefit cost in Other non-operating expenses. Additionally, Pension Benefit Guaranty Corporation premiums are reported within expected return on plan assets.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 28, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income (Loss) Changes in the components of accumulated other comprehensive income, including the amounts reclassified, for the third quarter and first nine months of 2018 and 2017 are as follows: Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at June 29, 2018 $ 1,582 $ 269 $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 ) Other comprehensive income before reclassifications 121 330 451 — 116 567 Amounts reclassified from accumulated other comprehensive income (169 ) (119 ) (288 ) 1,935 — 1,647 Net current period other comprehensive income (loss) before tax (48 ) 211 163 1,935 116 2,214 Deferred taxes (11 ) 49 38 428 — 466 Net current period other comprehensive income (loss) after tax (37 ) 162 125 1,507 116 1,748 Balance at September 28, 2018 $ 1,545 $ 431 $ 1,976 $ (95,511 ) $ (3,823 ) $ (97,358 ) Balance at June 30, 2017 $ 1,109 $ 93 $ 1,202 $ (80,842 ) $ (4,282 ) $ (83,922 ) Other comprehensive income (loss) before reclassifications (324 ) (205 ) (529 ) — 271 (258 ) Amounts reclassified from accumulated other comprehensive income 433 (94 ) 339 1,345 — 1,684 Net current period other comprehensive income (loss) before tax 109 (299 ) (190 ) 1,345 271 1,426 Deferred taxes 41 (111 ) (70 ) 464 — 394 Net current period other comprehensive income (loss) after tax 68 (188 ) (120 ) 881 271 1,032 Balance at September 29, 2017 $ 1,177 $ (95 ) $ 1,082 $ (79,961 ) $ (4,011 ) $ (82,890 ) Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at December 31, 2017 $ 959 $ (196 ) $ 763 $ (99,592 ) $ (4,108 ) $ (102,937 ) Other comprehensive income (loss) before reclassifications (206 ) 774 568 — 285 853 Amounts reclassified from accumulated other comprehensive income 250 40 290 5,183 — 5,473 Net current period other comprehensive income before tax 44 814 858 5,183 285 6,326 Deferred taxes (542 ) 187 (355 ) 1,102 — 747 Net current period other comprehensive income after tax 586 627 1,213 4,081 285 5,579 Balance at September 28, 2018 $ 1,545 $ 431 $ 1,976 $ (95,511 ) $ (3,823 ) $ (97,358 ) Balance at December 31, 2016 $ 1,837 $ — $ 1,837 $ (82,358 ) $ (5,660 ) $ (86,181 ) Other comprehensive income (loss) before reclassifications (1,205 ) 30 (1,175 ) — 1,649 474 Amounts reclassified from accumulated other comprehensive income 219 (182 ) 37 3,655 — 3,692 Net current period other comprehensive income (loss) before tax (986 ) (152 ) (1,138 ) 3,655 1,649 4,166 Deferred taxes (326 ) (57 ) (383 ) 1,258 — 875 Net current period other comprehensive income (loss) after tax (660 ) (95 ) (755 ) 2,397 1,649 3,291 Balance at September 29, 2017 $ 1,177 $ (95 ) $ 1,082 $ (79,961 ) $ (4,011 ) $ (82,890 ) Reclassifications from accumulated other comprehensive income of gains and losses on foreign currency cash flow hedges are recorded in Other-net in the Consolidated Statements of Income. Reclassifications from accumulated other comprehensive income of gains and losses on precious metal cash flow hedges are recorded in Cost of sales in the Consolidated Statements of Income. Refer to Note M for additional details on cash flow hedges. Reclassifications from accumulated other comprehensive income for pension and post-employment benefits are included in the computation of the net periodic pension and post-employment benefit expense. Refer to Note I for additional details on pension and post-employment expenses.

Stock-based Compensation Expens

Stock-based Compensation Expense	9 Months Ended
	Sep. 28, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation Expense	Stock-based Compensation Expense Stock-based compensation expense, which includes awards settled in shares and in cash, was $4.2 million and $9.4 million in the third quarter and first nine months of 2018 , respectively, compared to $1.5 million and $6.2 million in the same periods of 2017. The Company granted 65,112 stock appreciation rights (SARs) to certain employees during the first nine months of 2018 . The weighted-average exercise price per share and weighted-average fair value per share of the SARs granted during the nine months ended September 28, 2018 were $50.35 and $15.73 , respectively. The Company estimated the fair value of the SARs using the following weighted-average assumptions in the Black-Scholes model: Risk-free interest rate 2.58 % Dividend yield 0.8 % Volatility 31.9 % Expected term (in years) 5.5 The Company granted 59,222 stock-settled restricted stock units (RSUs) to certain employees and 14,728 stock-settled RSUs to non-employee directors during the first nine months of 2018 . The Company measures the fair value of stock-settled RSUs based on the closing market price of a share of Materion common stock on the date of the grant. The weighted-average fair value per share was $50.35 and $51.60 for stock-settled RSUs granted to employees and non-employee directors, respectively, during the nine months ended September 28, 2018 . RSUs are expensed over the vesting period of three years for employees and one year for non-employee directors. The Company granted stock-settled performance-based restricted stock units (PRSUs) to certain employees in the first nine months of 2018 . The weighted-average fair value of the stock-settled PRSUs was $50.35 per share and will be expensed over the vesting period of three years . The final payout to the employees for all PRSUs will be based upon the Company’s return on invested capital and the total return to shareholders over the vesting period relative to a peer group’s performance over the same period. At September 28, 2018 , unearned compensation cost related to the unvested portion of all stock-based awards was approximately $9.2 million , and is expected to be recognized over the remaining vesting period of the respective grants.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 28, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company measures and records financial instruments at fair value. A fair value hierarchy is used for those instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s assumptions (unobservable inputs). The hierarchy consists of three levels: Level 1 — Quoted market prices in active markets for identical assets and liabilities; Level 2 — Inputs other than Level 1 inputs that are either directly or indirectly observable; and Level 3 — Unobservable inputs developed using estimates and assumptions developed by the Company, which reflect those that a market participant would use. The following table summarizes the financial instruments measured at fair value in the Consolidated Balance Sheets as of September 28, 2018 and December 31, 2017 : (Thousands) Total Carrying Value in the Consolidated Balance Sheets Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) 2018 2017 2018 2017 2018 2017 2018 2017 Financial Assets Deferred compensation investments $ 2,400 $ 2,310 $ 2,400 $ 2,310 $ — $ — $ — $ — Foreign currency forward contracts 226 254 — — 226 254 — — Precious metal swaps 655 14 — — 655 14 — — Total $ 3,281 $ 2,578 $ 2,400 $ 2,310 $ 881 $ 268 $ — $ — Financial Liabilities Deferred compensation liability $ 2,400 $ 2,310 $ 2,400 $ 2,310 $ — $ — $ — $ — Foreign currency forward contracts 170 201 — — 170 201 — — Precious metal swaps 97 269 — — 97 269 — — Total $ 2,667 $ 2,780 $ 2,400 $ 2,310 $ 267 $ 470 $ — $ — The Company uses a market approach to value the assets and liabilities for financial instruments in the table above. Outstanding contracts are valued through models that utilize market observable inputs, including both spot and forward prices, for the same underlying currencies and metals. The carrying values of the other working capital items and debt in the Consolidated Balance Sheets approximate fair values as of September 28, 2018 and December 31, 2017.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activity	9 Months Ended
	Sep. 28, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activity	Derivative Instruments and Hedging Activity The Company uses derivative contracts to hedge portions of its foreign currency exposures and uses derivatives to hedge a portion of its precious metal exposures. The objectives and strategies for using derivatives in these areas are as follows: Foreign Currency. The Company sells a portion of its products to overseas customers in their local currencies, primarily the euro and yen. The Company secures foreign currency derivatives, mainly forward contracts and options, to hedge these anticipated sales transactions. The purpose of the hedge program is to protect against the reduction in the dollar value of foreign currency sales from adverse exchange rate movements. Should the dollar strengthen significantly, the decrease in the translated value of the foreign currency sales should be partially offset by gains on the hedge contracts. Depending upon the methods used, hedge contracts may limit the benefits from a weakening U.S. dollar. The use of forward contracts locks in a firm rate and eliminates any downside risk from an adverse rate movement as well as any benefit from a favorable rate movement. The Company may from time to time choose to hedge with options or a tandem of options, known as a collar. These hedging techniques can limit or eliminate the downside risk but can allow for some or all of the benefit from a favorable rate movement to be realized. Unlike a forward contract, a premium is paid for an option; collars, which are a combination of a put and call option, may have a net premium but can be structured to be cash neutral. The Company will primarily hedge with forward contracts due to the relationship between the cash outlay and the level of risk. The use of foreign currency derivative contracts is governed by policies approved by the Audit Committee of the Board of Directors. A team consisting of senior financial managers reviews the estimated exposure levels, as defined by budgets, forecasts, and other internal data, and determines the timing, amounts, and instruments to use to hedge that exposure within the confines of the policy. Management analyzes the effective hedged rates and the actual and projected gains and losses on the hedging transactions against the program objectives, targeted rates, and levels of risk assumed. Hedge contracts are typically layered in at different times for a specified exposure period in order to minimize the impact of rate movements. Precious Metals. The Company maintains the majority of its precious metal production requirements on consignment in order to reduce its working capital investment and the exposure to metal price movements. When a precious metal product is fabricated and ready for shipment to the customer, the metal is purchased out of consignment at the current market price. The price paid by the Company forms the basis for the price charged to the customer. This methodology allows for changes in either direction in the market prices of the precious metals used by the Company to be passed through to the customer, and reduces the impact changes in prices could have on the Company's margins and operating profit. The consigned metal is owned by financial institutions that charge the Company a financing fee based upon the current value of the metal on hand. In certain instances, a customer may want to establish the price for the precious metal at the time the sales order is placed rather than at the time of shipment. Setting the sales price at a different date than when the material would be purchased potentially creates an exposure to movements in the market price of the metal. Therefore, in these limited situations, the Company may elect to enter into a forward contract to purchase precious metal. The forward contract allows the Company to purchase metal at a fixed price on a specific future date. The price in the forward contract serves as the basis for the price to be charged to the customer. By doing so, the selling price and purchase price are matched, and the Company's price exposure is reduced. The Company refines precious metal-containing materials for its customers and typically will purchase the refined metal from the customer at current market prices. In limited circumstances, the customer may want to fix the price to be paid at the time of the order as opposed to when the material is refined. The customer may also want to fix the price for a set period of time. The Company may then elect to enter into a hedge contract, either a forward contract or a swap, to fix the price for the estimated quantity of metal to be purchased, thereby reducing the exposure to adverse movements in the price of the metal. In certain circumstances, the Company also refines metal from the customer and may retain a portion of the refined metal as payment. The Company may elect to enter into a forward contract to sell precious metal to reduce the Company's price exposure. The Company may from time to time elect to purchase precious metal and hold in inventory rather than on consignment due to potential credit line limitations or other factors. These purchases are typically held for a short duration. A forward contract will be secured at the time of the purchase to fix the price to be used when the metal is transferred back to the consignment line, thereby limiting any price exposure during the time when the metal was owned. The Company will only enter into a derivative contract if there is an underlying identified exposure. Contracts are typically held until maturity. The Company does not engage in derivative trading activities and does not use derivatives for speculative purposes. The Company only uses currency hedge contracts that are denominated in the same currency as the underlying exposure and precious metal hedge contracts denominated in the same metal as the underlying exposure. All derivatives are recorded on the balance sheet at fair value. If the derivative is designated and effective as a cash flow hedge, changes in the fair value of the derivative are recognized in other comprehensive income (OCI) until the hedged item is recognized in earnings. The ineffective portion of a derivative’s fair value, if any, is recognized in earnings immediately. If a derivative is not a hedge, changes in the fair value are adjusted through income. The fair values of the outstanding derivatives are recorded on the balance sheet as assets (if the derivatives are in a gain position) or liabilities (if the derivatives are in a loss position). The fair values will also be classified as short-term or long-term depending upon their maturity dates. The following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives not designated as hedging instruments and balance sheet classification as of September 28, 2018 and December 31, 2017 : September 28, 2018 December 31, 2017 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Foreign currency forward contracts - euro Prepaid expenses $ 11,622 $ 40 $ 13,981 $ 127 Other liabilities and accrued items 37,027 170 — — Total $ 48,649 $ 130 $ 13,981 $ 127 These outstanding foreign currency derivatives were related to intercompany loans. Other-net included foreign currency gains relating to these derivatives of $0.4 million and $1.6 million during the third quarter and first nine months of 2018, respectively, compared to foreign currency losses of $0.5 million and $1.1 million during the same periods in 2017, respectively. The following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives designated as cash flow hedges and balance sheet classification as of September 28, 2018 and December 31, 2017 : September 28, 2018 December 31, 2017 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Prepaid expenses Foreign currency forward contracts - yen $ 1,413 $ 44 $ 5,673 $ 91 Foreign currency forward contracts - euro 3,811 142 5,026 36 Precious metal swaps 7,198 654 — — Total 12,422 840 10,699 127 Other assets Precious metal swaps 246 1 880 14 Total 246 1 880 14 Other liabilities and accrued items Foreign currency forward contracts - yen — — — — Foreign currency forward contracts - euro — — 13,583 201 Precious metal swaps 845 94 10,067 255 Total 845 94 23,650 456 Other long-term liabilities Precious metal swaps 121 3 789 14 Total $ 13,634 $ 744 $ 36,018 $ 329 All of these contracts were designated and effective as cash flow hedges. No ineffectiveness expense was recorded in the third quarter and first nine months of 2018 or 2017. Changes in the fair value of outstanding cash flow hedges recorded in OCI for the first nine months of 2018 and 2017 totaled an increase of $0.6 million and a decrease of $1.2 million , respectively. The Company expects to relieve substantially the entire balance in OCI as of September 28, 2018 to the Consolidated Statements of Income within the next 18-month period. Refer to Note J for additional OCI details.

Contingencies

Contingencies	9 Months Ended
	Sep. 28, 2018
Loss Contingency [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Contingencies Legal Proceedings . For information regarding legal proceedings relating to Chronic Beryllium Disease Claims , refer to Note R ("Contingencies and Commitments") in the Company's 2017 Annual Report on Form 10-K. Other Litigation. The Company is party to several pending legal proceedings and claims arising in the normal course of business. The Company records a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. In the event the Company determines that a loss is not probable, but is reasonably possible, and it becomes possible to develop what the Company believes to be a reasonable range of possible loss, then the Company will include disclosure related to such matters. To the extent there is a reasonable possibility that the losses could exceed any amounts accrued, the Company will adjust the accrual in the period the determination is made, disclose an estimate of the additional loss or range of loss, indicate that the estimate is immaterial with respect to its financial statements as a whole or, if the amount of such adjustment cannot be reasonably estimated, disclose that an estimate cannot be made. Environmental Proceedings. The Company has an active environmental compliance program and records reserves for the probable cost of identified environmental remediation projects. The reserves are established based upon analyses conducted by the Company’s engineers and outside consultants and are adjusted from time to time based upon ongoing studies, the difference between actual and estimated costs, and other factors. The reserves may also be affected by rulings and negotiations with regulatory agencies. The undiscounted reserve balance was $6.5 million at both September 28, 2018 and December 31, 2017 . Environmental projects tend to be long-term, and the final actual remediation costs may differ from the amounts currently recorded.

Basis of Accounting (Policies)

Basis of Accounting (Policies)	9 Months Ended
	Sep. 28, 2018
Accounting Policies [Abstract]
Basis of Accounting	Basis of Presentation: In management’s opinion, the accompanying consolidated financial statements of Materion Corporation and its subsidiaries (referred to herein as the Company, our, we, or us) contain all of the adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods reported. All adjustments were of a normal and recurring nature. Certain amounts in prior periods have been reclassified to conform to the 2018 consolidated financial statement presentation. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company's 2017 Annual Report on Form 10-K. The interim period results are not necessarily indicative of the results to be expected for the full year.

New Pronouncements (Policies)

New Pronouncements (Policies)	9 Months Ended
	Sep. 28, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements	New Pronouncements Adopted: In March 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which requires an employer to report the service cost component of net benefit cost in the same line item as other compensation costs arising from services rendered by pertinent employees during the period. This ASU requires non-service cost components of net benefit cost to be presented in a caption below the Company's Operating profit and allows only the service cost component to be eligible for capitalization. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods, with early adoption permitted. The Company adopted the new standard as of January 1, 2018 and applied its amendments retrospectively for the presentation of service cost and other components of net benefit cost on the income statement and prospectively for the capitalization of service cost and net periodic postretirement benefits in assets. The application of ASU 2017-07 resulted in an increase to Operating profit of $0.4 million and $1.0 million for the third quarter and first nine months of 2017, respectively, which was offset by a corresponding increase in Other non-operating expense, net. The adoption of this ASU did not have a material effect on the Company's financial condition or liquidity. The Company utilized this ASU's practical expedient, which permits the Company to use the amounts disclosed in its Pensions and Other Post-employment Benefits note for the prior comparative periods as the estimation basis for applying the retrospective presentation requirements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (ASC 606), which supersedes previous revenue recognition guidance. The Company adopted the new standard using the modified retrospective method as of January 1, 2018. Prior periods were not retrospectively adjusted. This approach was applied to all contracts not completed as of January 1, 2018. The new standard primarily impacted the Company's timing of revenue recognition for certain contracts and subcontracts with the United States (U.S.) government that contain termination for convenience clauses, and due to the cumulative impact of adopting ASC 606, the Company recorded a reduction to beginning retained earnings of $0.4 million, net of tax as summarized below: (Thousands) December 31, 2017 Adjustments due to ASC 606 January 1, 2018 Assets Unbilled receivables $ — $ 2,658 $ 2,658 Inventories 220,352 (2,059 ) 218,293 Liabilities and Shareholders’ Equity Other liabilities and accrued items $ 28,044 61 28,105 Deferred income taxes 213 113 326 Retained earnings 536,116 425 536,541 The adoption of the standard did not have a material impact to the Company's consolidated financial statements. Refer to Note B for additional disclosures relating to ASC 606. New Pronouncements Issued: In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , which amends and simplifies existing guidance to allow companies to more accurately present the economic effects of risk management activities in the financial statements. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods, with early adoption permitted. The Company is currently evaluating the impact of adopting this new guidance on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases , which eliminates the off-balance-sheet accounting for leases. The new guidance will require lessees to report their operating leases as both an asset and liability on the balance sheet and disclose key information about leasing arrangements. This ASU is required to be applied using a modified retrospective adoption method with the option of applying the guidance either retrospectively to each prior comparative reporting period presented or retrospectively at the beginning of the period of adoption. Early adoption is permitted. The Company will adopt this ASU on January 1, 2019 and will apply it retrospectively at the beginning of the period of adoption through a cumulative-effect adjustment to retained earnings. The Company will elect to apply the practical expedients that do not require reassessment of existing contracts for embedded leases or to reassess lease classification or initial direct costs. In preparation for the adoption, the Company, along with an outside consultant, has executed on its project plan to identify a complete lease population, analyze lease agreements, and evaluate technology solutions. The Company selected and began implementing a new lease management system during the third quarter of 2018. Once the transition to the new system is completed, this software will enable us to quantify the full impact this ASU will have on our consolidated financial statements. No other recently issued or effective ASUs had, or are expected to have, a material effect on the Company's results of operations, financial condition, or liquidity.

Revenue Recognition Accounting

Revenue Recognition Accounting Policy (Policies)	9 Months Ended
	Sep. 28, 2018
Accounting Policies [Abstract]
Revenue Recognition, Policy [Policy Text Block]	Net sales consist primarily of revenue from the sale of precious and non-precious specialty metals, beryllium and copper-based alloys, beryllium composites, and other products into numerous end markets. The Company requires an agreement with a customer that creates enforceable rights and performance obligations. The Company generally recognizes revenue, in an amount that reflects the consideration to which it expects to be entitled, upon satisfaction of a performance obligation by transferring control over a product to the customer. Control over the product is generally transferred to the customer when the Company has a present right to payment, the customer has legal title, the customer has physical possession, the customer has the significant risks and rewards of ownership, and/or the customer has accepted the product. Shipping and Handling Costs : The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill our promise to transfer the associated products. Accordingly, customer payments of shipping and handling costs are recorded as a component of net sales, and related costs are recorded as a component of cost of sales. Taxes Collected from Customers and Remitted to Governmental Authorities : Revenue is recorded net of taxes collected from customers that are remitted to governmental authorities, with the collected taxes recorded as current liabilities until remitted to the relevant government authority. Product Warranty : Substantially all of the Company’s customer contracts contain a warranty that provides assurance that the purchased product will function as expected and in accordance with certain specifications. The warranty is intended to safeguard the customer against existing defects and does not provide any incremental service to the customer. Transaction Price Allocated to Future Performance Obligations: ASC 606 requires that the Company disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied at September 28, 2018. Remaining performance obligations include noncancelable purchase orders and customer contracts. The guidance provides certain practical expedients that limit this requirement. As such, the Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less. After considering the practical expedient, at September 28, 2018, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $33.0 million , of which $4.0 million will be recognized in 2018. Contract Costs : The Company recognizes the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that the Company otherwise would have recognized is one year or less. These costs primarily relate to sales commissions, which are included in selling, general, and administrative expenses.

Accounting Policies (Tables)

Accounting Policies (Tables)	9 Months Ended
	Sep. 28, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The new standard primarily impacted the Company's timing of revenue recognition for certain contracts and subcontracts with the United States (U.S.) government that contain termination for convenience clauses, and due to the cumulative impact of adopting ASC 606, the Company recorded a reduction to beginning retained earnings of $0.4 million, net of tax as summarized below: (Thousands) December 31, 2017 Adjustments due to ASC 606 January 1, 2018 Assets Unbilled receivables $ — $ 2,658 $ 2,658 Inventories 220,352 (2,059 ) 218,293 Liabilities and Shareholders’ Equity Other liabilities and accrued items $ 28,044 61 28,105 Deferred income taxes 213 113 326 Retained earnings 536,116 425 536,541

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 28, 2018
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset and Liability	Contract Balances : The timing of revenue recognition, billings and cash collections resulted in the following contract assets and contract liabilities: (Thousands) September 28, 2018 January 1, 2018 $ change % change Accounts receivable, trade $ 126,537 $ 122,393 $ 4,144 3 % Unbilled receivables 6,383 2,658 3,725 140 % Unearned revenue 7,805 5,451 2,354 43 %

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 28, 2018
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The final purchase price allocation for the acquisition is as follows: (Thousands) Amount Assets: Inventories $ 7,221 Prepaid and other current assets 2,270 Long-term deferred income taxes 14 Property, plant, and equipment 6,501 Intangible assets 3,649 Goodwill 3,574 Total assets acquired $ 23,229 Liabilities: Other liabilities and accrued items $ 984 Other long-term liabilities 449 Retirement and post-employment benefits 5,292 Total liabilities assumed $ 6,725 Total purchase price $ 16,504

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 28, 2018
Segment Reporting [Abstract]
Segment Reporting	(Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Third Quarter 2018 Net sales $ 124,103 $ 144,072 $ 29,018 $ — $ 297,193 Intersegment sales 2 13,265 — — 13,267 Operating profit (loss) 16,728 6,882 3,499 (8,443 ) 18,666 Third Quarter 2017 Net sales $ 109,393 $ 157,770 $ 27,105 $ — $ 294,268 Intersegment sales 54 12,814 — — 12,868 Operating profit (loss) 6,786 9,756 1,613 (6,191 ) 11,964 First Nine Months 2018 Net sales $ 372,104 $ 447,941 $ 89,700 $ — $ 909,745 Intersegment sales 33 36,317 — — 36,350 Operating profit (loss) 38,898 18,352 9,107 (19,248 ) 47,109 First Nine Months 2017 Net sales $ 310,487 $ 429,550 $ 90,742 $ — $ 830,779 Intersegment sales 113 42,508 — — 42,621 Operating profit (loss) 12,523 24,873 6,145 (17,788 ) 25,753
Disaggregation of Revenue	The following table disaggregates revenue for each segment by end market for the third quarter and first nine months of 2018: (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Third Quarter 2018 End Market Consumer Electronics $ 24,966 $ 78,859 $ 4,733 $ — $ 108,558 Industrial Components 24,745 11,406 2,855 — 39,006 Energy 11,146 20,301 4 — 31,451 Automotive Electronics 21,681 — 530 — 22,211 Defense 11,430 3,761 5,503 — 20,694 Medical 1,862 4,448 15,261 — 21,571 Telecom Infrastructure 9,845 6,664 — — 16,509 Other 18,428 18,633 132 — 37,193 Total $ 124,103 $ 144,072 $ 29,018 $ — $ 297,193 First Nine Months 2018 End Market Consumer Electronics $ 76,793 $ 249,139 $ 14,047 $ — $ 339,979 Industrial Components 78,291 36,206 8,247 — 122,744 Energy 29,152 60,048 12 — 89,212 Automotive Electronics 60,530 — 1,221 — 61,751 Defense 32,984 11,599 14,705 — 59,288 Medical 5,421 13,569 48,786 — 67,776 Telecom Infrastructure 28,829 21,989 59 — 50,877 Other 60,104 55,391 2,623 — 118,118 Total $ 372,104 $ 447,941 $ 89,700 $ — $ 909,745

Other-net (Tables)

Other-net (Tables)	9 Months Ended
	Sep. 28, 2018
Other Income and Expenses [Abstract]
Summary of Other-Net Expense	Other-net expense for the third quarter and first nine months of 2018 and 2017 is summarized as follows: Third Quarter Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Metal consignment fees $ 2,503 $ 2,436 $ 7,520 $ 6,183 Amortization of intangible assets 524 1,179 1,858 3,456 Foreign currency loss (gain) 140 (201 ) 1,359 (794 ) Fixed asset impairment — 114 — 314 Cost reduction initiatives — 189 — 189 Net loss on disposal of fixed assets 14 60 37 207 Sublease income (119 ) (28 ) (378 ) (83 ) Other items 85 52 (12 ) 351 Total $ 3,147 $ 3,801 $ 10,384 $ 9,823

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 28, 2018
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The following table sets forth the computation of basic and diluted EPS: Third Quarter Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands, except per share amounts) 2018 2017 2018 2017 Numerator for basic and diluted EPS: Net income $ 19,966 $ 9,320 $ 41,674 $ 19,683 Denominator: Denominator for basic EPS: Weighted-average shares outstanding 20,241 20,040 20,199 20,007 Effect of dilutive securities: Stock appreciation rights 168 149 183 148 Restricted stock units 86 94 84 95 Performance-based restricted stock units 153 128 141 111 Diluted potential common shares 407 371 408 354 Denominator for diluted EPS: Adjusted weighted-average shares outstanding 20,648 20,411 20,607 20,361 Basic EPS $ 0.99 $ 0.47 $ 2.06 $ 0.98 Diluted EPS $ 0.97 $ 0.46 $ 2.02 $ 0.97

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 28, 2018
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories on the Consolidated Balance Sheets are summarized as follows: Sept. 28, December 31, (Thousands) 2018 2017 Raw materials and supplies $ 37,438 $ 42,958 Work in process 176,792 187,719 Finished goods 35,660 34,418 Subtotal $ 249,890 $ 265,095 Less: LIFO reserve balance 49,977 44,743 Inventories $ 199,913 $ 220,352

Pensions and Other Post-emplo_2

Pensions and Other Post-employment Benefits (Tables)	9 Months Ended
	Sep. 28, 2018
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Cost	The following is a summary of the net periodic benefit cost for the third quarter and first nine months of 2018 and 2017 for the domestic pension plans (which include the defined benefit pension plan and the supplemental retirement plans) and the domestic retiree medical plan. Pension Benefits Other Benefits Third Quarter Ended Third Quarter Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Components of net periodic benefit cost (benefit) Service cost $ 1,674 $ 1,813 $ 27 $ 23 Interest cost 2,397 2,372 99 99 Expected return on plan assets (3,697 ) (3,385 ) — — Amortization of prior service benefit (31 ) (42 ) (374 ) (374 ) Amortization of net loss 1,959 1,623 — — Net periodic benefit cost (benefit) $ 2,302 $ 2,381 $ (248 ) $ (252 ) Settlements 359 — — — Total net benefit cost $ 2,661 $ 2,381 $ (248 ) $ (252 ) Pension Benefits Other Benefits Nine Months Ended Nine Months Ended Sept. 28, Sept. 29, Sept. 28, Sept. 29, (Thousands) 2018 2017 2018 2017 Components of net periodic benefit cost (benefit) Service cost $ 5,022 $ 5,309 $ 83 $ 69 Interest cost 7,191 7,098 297 297 Expected return on plan assets (11,091 ) (10,128 ) — — Amortization of prior service benefit (92 ) (236 ) (1,123 ) (1,122 ) Amortization of net loss 5,878 4,821 — — Net periodic benefit cost (benefit) $ 6,908 $ 6,864 $ (743 ) $ (756 ) Settlements 359 — — — Total net benefit cost $ 7,267 $ 6,864 $ (743 ) $ (756 )

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 28, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Changes in the components of accumulated other comprehensive income, including the amounts reclassified, for the third quarter and first nine months of 2018 and 2017 are as follows: Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at June 29, 2018 $ 1,582 $ 269 $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 ) Other comprehensive income before reclassifications 121 330 451 — 116 567 Amounts reclassified from accumulated other comprehensive income (169 ) (119 ) (288 ) 1,935 — 1,647 Net current period other comprehensive income (loss) before tax (48 ) 211 163 1,935 116 2,214 Deferred taxes (11 ) 49 38 428 — 466 Net current period other comprehensive income (loss) after tax (37 ) 162 125 1,507 116 1,748 Balance at September 28, 2018 $ 1,545 $ 431 $ 1,976 $ (95,511 ) $ (3,823 ) $ (97,358 ) Balance at June 30, 2017 $ 1,109 $ 93 $ 1,202 $ (80,842 ) $ (4,282 ) $ (83,922 ) Other comprehensive income (loss) before reclassifications (324 ) (205 ) (529 ) — 271 (258 ) Amounts reclassified from accumulated other comprehensive income 433 (94 ) 339 1,345 — 1,684 Net current period other comprehensive income (loss) before tax 109 (299 ) (190 ) 1,345 271 1,426 Deferred taxes 41 (111 ) (70 ) 464 — 394 Net current period other comprehensive income (loss) after tax 68 (188 ) (120 ) 881 271 1,032 Balance at September 29, 2017 $ 1,177 $ (95 ) $ 1,082 $ (79,961 ) $ (4,011 ) $ (82,890 ) Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at December 31, 2017 $ 959 $ (196 ) $ 763 $ (99,592 ) $ (4,108 ) $ (102,937 ) Other comprehensive income (loss) before reclassifications (206 ) 774 568 — 285 853 Amounts reclassified from accumulated other comprehensive income 250 40 290 5,183 — 5,473 Net current period other comprehensive income before tax 44 814 858 5,183 285 6,326 Deferred taxes (542 ) 187 (355 ) 1,102 — 747 Net current period other comprehensive income after tax 586 627 1,213 4,081 285 5,579 Balance at September 28, 2018 $ 1,545 $ 431 $ 1,976 $ (95,511 ) $ (3,823 ) $ (97,358 ) Balance at December 31, 2016 $ 1,837 $ — $ 1,837 $ (82,358 ) $ (5,660 ) $ (86,181 ) Other comprehensive income (loss) before reclassifications (1,205 ) 30 (1,175 ) — 1,649 474 Amounts reclassified from accumulated other comprehensive income 219 (182 ) 37 3,655 — 3,692 Net current period other comprehensive income (loss) before tax (986 ) (152 ) (1,138 ) 3,655 1,649 4,166 Deferred taxes (326 ) (57 ) (383 ) 1,258 — 875 Net current period other comprehensive income (loss) after tax (660 ) (95 ) (755 ) 2,397 1,649 3,291 Balance at September 29, 2017 $ 1,177 $ (95 ) $ 1,082 $ (79,961 ) $ (4,011 ) $ (82,890 )

Stock-based Compensation Expe_2

Stock-based Compensation Expense Tables (Tables)	9 Months Ended
	Sep. 28, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule Of Share Based Payment Award SARs Valuation Assumptions [Table Text Block]	The Company estimated the fair value of the SARs using the following weighted-average assumptions in the Black-Scholes model: Risk-free interest rate 2.58 % Dividend yield 0.8 % Volatility 31.9 % Expected term (in years) 5.5

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 28, 2018
Fair Value Disclosures [Abstract]
Summary of Fair Value Information and Derivative Financial Instruments	The following table summarizes the financial instruments measured at fair value in the Consolidated Balance Sheets as of September 28, 2018 and December 31, 2017 : (Thousands) Total Carrying Value in the Consolidated Balance Sheets Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) 2018 2017 2018 2017 2018 2017 2018 2017 Financial Assets Deferred compensation investments $ 2,400 $ 2,310 $ 2,400 $ 2,310 $ — $ — $ — $ — Foreign currency forward contracts 226 254 — — 226 254 — — Precious metal swaps 655 14 — — 655 14 — — Total $ 3,281 $ 2,578 $ 2,400 $ 2,310 $ 881 $ 268 $ — $ — Financial Liabilities Deferred compensation liability $ 2,400 $ 2,310 $ 2,400 $ 2,310 $ — $ — $ — $ — Foreign currency forward contracts 170 201 — — 170 201 — — Precious metal swaps 97 269 — — 97 269 — — Total $ 2,667 $ 2,780 $ 2,400 $ 2,310 $ 267 $ 470 $ — $ —

Derivative Instruments and He_2

Derivative Instruments and Hedging Activity Tables (Tables)	9 Months Ended
	Sep. 28, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DerivativeInstrumentsNonHedging [Table Text Block]	The following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives not designated as hedging instruments and balance sheet classification as of September 28, 2018 and December 31, 2017 : September 28, 2018 December 31, 2017 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Foreign currency forward contracts - euro Prepaid expenses $ 11,622 $ 40 $ 13,981 $ 127 Other liabilities and accrued items 37,027 170 — — Total $ 48,649 $ 130 $ 13,981 $ 127
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	The following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives designated as cash flow hedges and balance sheet classification as of September 28, 2018 and December 31, 2017 : September 28, 2018 December 31, 2017 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Prepaid expenses Foreign currency forward contracts - yen $ 1,413 $ 44 $ 5,673 $ 91 Foreign currency forward contracts - euro 3,811 142 5,026 36 Precious metal swaps 7,198 654 — — Total 12,422 840 10,699 127 Other assets Precious metal swaps 246 1 880 14 Total 246 1 880 14 Other liabilities and accrued items Foreign currency forward contracts - yen — — — — Foreign currency forward contracts - euro — — 13,583 201 Precious metal swaps 845 94 10,067 255 Total 845 94 23,650 456 Other long-term liabilities Precious metal swaps 121 3 789 14 Total $ 13,634 $ 744 $ 36,018 $ 329

New Prouncements Adopted (Detai

New Prouncements Adopted (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other non-operating expense - net		$ 800	$ 406	$ 1,679	$ 1,041
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 400

New Pronouncements Adopted (Det

New Pronouncements Adopted (Details 1) - USD ($) $ in Thousands	Sep. 28, 2018	Jan. 01, 2018	Dec. 31, 2017
Retained Earnings Adjustments [Line Items]
Unbilled receivables		$ 2,658	$ 0
Inventories	$ 199,913	218,293	220,352
Other liabilities and accrued items	28,934	28,105	28,044
Deferred income taxes	210	326	213
Retained earnings	$ 571,350	536,541	$ 536,116
Adjustments for New Accounting Pronouncement [Member]
Retained Earnings Adjustments [Line Items]
Unbilled receivables		2,658
Inventories		(2,059)
Other liabilities and accrued items		61
Deferred income taxes		113
Retained earnings		$ 425

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Jan. 01, 2018
Capitalized Contract Cost [Line Items]
Increase (Decrease) in Unearned Revenue	$ 2,365	$ 4,746
Trade Accounts Receivable
Capitalized Contract Cost [Line Items]
Accounts Receivable, Trade	126,537		$ 122,393
Change in Accounts Receivable, Trade	$ 4,144
Contract Asset Percent Change	3.00%
Unbilled Receivables
Capitalized Contract Cost [Line Items]
Unbilled Contracts Receivable	$ 6,383		2,658
Change in Unbilled Receivables	$ 3,725
Contract Asset Percent Change	140.00%
UnearnedRevenue
Capitalized Contract Cost [Line Items]
Deferred Revenue	$ 7,805		$ 5,451
Increase (Decrease) in Unearned Revenue	$ 2,354
Contract Liability Percent Change	43.00%

Revenue Recognition (Details 1)

Revenue Recognition (Details 1) $ in Millions	Sep. 28, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining Performance Obligation	$ 33
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining Performance Obligation	$ 4

Acquisitions (Details)

Acquisitions (Details) $ in Thousands	Feb. 28, 2017USD ($)
Business Acquisition [Line Items]
Inventories	$ 7,221
Prepaid and other current assets	2,270
Long-term deferred income taxes	14
Property, plant, and equipment	6,501
Intangible Assets	3,649
Goodwill	3,574
Total assets acquired	23,229
Other liabilities and accrued items	984
Other long-term liabilities	449
Retirement and post-employment benefits	5,292
Total liabilities assumed	6,725
Total purchase price	$ 16,504

Acquisitions Textual (Details)

Acquisitions Textual (Details) $ in Thousands	Feb. 28, 2017USD ($)
Business Combinations [Abstract]
Total purchase price	$ 16,504

Segment Reporting (Detail)

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Segment Reporting Information
Net sales	$ 297,193	$ 294,268	$ 909,745	$ 830,779
Intersegment sales	13,267	12,868	36,350	42,621
Operating profit (loss)	18,666	11,964	47,109	25,753
Performance Alloys and Composites
Segment Reporting Information
Net sales	124,103	109,393	372,104	310,487
Intersegment sales	2	54	33	113
Operating profit (loss)	16,728	6,786	38,898	12,523
Advanced Materials
Segment Reporting Information
Net sales	144,072	157,770	447,941	429,550
Intersegment sales	13,265	12,814	36,317	42,508
Operating profit (loss)	6,882	9,756	18,352	24,873
Precision Coatings
Segment Reporting Information
Net sales	29,018	27,105	89,700	90,742
Intersegment sales	0	0	0	0
Operating profit (loss)	3,499	1,613	9,107	6,145
Other
Segment Reporting Information
Net sales	0	0	0	0
Intersegment sales	0	0	0	0
Operating profit (loss)	$ (8,443)	$ (6,191)	$ (19,248)	$ (17,788)

Segment Reporting (Details 1)

Segment Reporting (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 297,193	$ 294,268	$ 909,745	$ 830,779
Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	108,558		339,979
Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	39,006		122,744
Energy
Disaggregation of Revenue [Line Items]
Net sales	31,451		89,212
Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	22,211		61,751
Defense
Disaggregation of Revenue [Line Items]
Net sales	20,694		59,288
Medical
Disaggregation of Revenue [Line Items]
Net sales	21,571		67,776
Telecom Infrastructure
Disaggregation of Revenue [Line Items]
Net sales	16,509		50,877
Other End Market
Disaggregation of Revenue [Line Items]
Net sales	37,193		118,118
Performance Alloys and Composites
Disaggregation of Revenue [Line Items]
Net sales	124,103	109,393	372,104	310,487
Performance Alloys and Composites | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	24,966		76,793
Performance Alloys and Composites | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	24,745		78,291
Performance Alloys and Composites | Energy
Disaggregation of Revenue [Line Items]
Net sales	11,146		29,152
Performance Alloys and Composites | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	21,681		60,530
Performance Alloys and Composites | Defense
Disaggregation of Revenue [Line Items]
Net sales	11,430		32,984
Performance Alloys and Composites | Medical
Disaggregation of Revenue [Line Items]
Net sales	1,862		5,421
Performance Alloys and Composites | Telecom Infrastructure
Disaggregation of Revenue [Line Items]
Net sales	9,845		28,829
Performance Alloys and Composites | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	18,428		60,104
Advanced Materials
Disaggregation of Revenue [Line Items]
Net sales	144,072	157,770	447,941	429,550
Advanced Materials | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	78,859		249,139
Advanced Materials | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	11,406		36,206
Advanced Materials | Energy
Disaggregation of Revenue [Line Items]
Net sales	20,301		60,048
Advanced Materials | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	0		0
Advanced Materials | Defense
Disaggregation of Revenue [Line Items]
Net sales	3,761		11,599
Advanced Materials | Medical
Disaggregation of Revenue [Line Items]
Net sales	4,448		13,569
Advanced Materials | Telecom Infrastructure
Disaggregation of Revenue [Line Items]
Net sales	6,664		21,989
Advanced Materials | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	18,633		55,391
Precision Coatings
Disaggregation of Revenue [Line Items]
Net sales	29,018	27,105	89,700	90,742
Precision Coatings | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	4,733		14,047
Precision Coatings | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	2,855		8,247
Precision Coatings | Energy
Disaggregation of Revenue [Line Items]
Net sales	4		12
Precision Coatings | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	530		1,221
Precision Coatings | Defense
Disaggregation of Revenue [Line Items]
Net sales	5,503		14,705
Precision Coatings | Medical
Disaggregation of Revenue [Line Items]
Net sales	15,261		48,786
Precision Coatings | Telecom Infrastructure
Disaggregation of Revenue [Line Items]
Net sales	0		59
Precision Coatings | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	132		2,623
Other
Disaggregation of Revenue [Line Items]
Net sales	0	$ 0	0	$ 0
Other | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Energy
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Defense
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Medical
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Telecom Infrastructure
Disaggregation of Revenue [Line Items]
Net sales	0		0
Other | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	$ 0		$ 0

Other-net (Detail)

Other-net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Other Income and Expenses [Abstract]
Metal consignment fees	$ 2,503	$ 2,436	$ 7,520	$ 6,183
Amortization of Intangible Assets	524	1,179	1,858	3,456
Foreign currency loss (gain)	140	(201)	1,359	(794)
Fixed asset impairment	0	114	0	314
Cost reduction initiatives	0	189	0	189
Net loss on disposal of fixed assets	14	60	37	207
Other Income	(119)	(28)	(378)	(83)
Other items	85	52	(12)	351
Total	$ 3,147	$ 3,801	$ 10,384	$ 9,823

Income Taxes Details (Details)

Income Taxes Details (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Jun. 29, 2018	Sep. 28, 2018	Sep. 29, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. Federal Statutory Rate	21.00%	35.00%		21.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	$ 6,100			$ 7,100
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, GILTI Percentage				50.00%
Income tax (benefit) expense	(2,713)	$ 1,705		$ 1,746	$ 3,308
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1,500	$ (500)	$ (1,000)		$ (1,300)
Tax and Jobs Act of 2017 Incomplete Accounting Transition Tax for Accumulated Foreign Earnings Provisional Income Tax Expense Benefit				1,200
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit)			400	2,400
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 2,200		$ 600	7,400		$ 9,500
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)				$ 2,000		$ 5,000
Effective tax rate	(15.70%)	15.50%		4.00%	14.40%

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Numerator For Basic And Diluted EPS:
Net income	$ 19,966	$ 9,320	$ 41,674	$ 19,683
Denominator for basic EPS:
Weighted-average shares outstanding	20,241	20,040	20,199	20,007
Effect of dilutive securities:
Diluted potential common shares (in shares)	407	371	408	354
Denominator for diluted EPS:
Adjusted weighted-average shares outstanding	20,648	20,411	20,607	20,361
Basic EPS (in usd per share)	$ 0.99	$ 0.47	$ 2.06	$ 0.98
Diluted EPS (in usd per share)	$ 0.97	$ 0.46	$ 2.02	$ 0.97
Stock Appreciation Rights (SARs)
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	168	149	183	148
Restricted Stock Units (RSUs)
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	86	94	84	95
Performance Shares
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	153	128	141	111

Earnings Per Share (Details 1)

Earnings Per Share (Details 1) - shares	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Stock Appreciation Rights (SARs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock appreciation rights excluded from diluted EPS calculation	65,112	219,292	65,112	370,917

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands	Sep. 28, 2018	Jan. 01, 2018	Dec. 31, 2017
Principally average cost:
Raw materials and supplies	$ 37,438		$ 42,958
Work in process	176,792		187,719
Finished goods	35,660		34,418
Subtotal	249,890		265,095
Less: LIFO reserve balance	49,977		44,743
Inventories	$ 199,913	$ 218,293	$ 220,352

Inventories (Details 1)

Inventories (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Inventory Disclosure [Abstract]
LIFO liquidation effect	$ 0.2	$ 0	$ 0.3	$ 0.2

Pensions and Other Post-emplo_3

Pensions and Other Post-employment Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Pension Benefits [Member]
Components of net periodic benefit cost
Service cost	$ 1,674	$ 1,813	$ 5,022	$ 5,309
Interest cost	2,397	2,372	7,191	7,098
Expected return on plan assets	(3,697)	(3,385)	(11,091)	(10,128)
Amortization of prior service benefit	(31)	(42)	(92)	(236)
Amortization of net loss	1,959	1,623	5,878	4,821
Net periodic benefit cost (benefit)	2,302	2,381	6,908	6,864
Settlements	359	0	359	0
Total net benefit cost	2,661	2,381	7,267	6,864
Other Benefits [Member]
Components of net periodic benefit cost
Service cost	27	23	83	69
Interest cost	99	99	297	297
Expected return on plan assets	0	0	0	0
Amortization of prior service benefit	(374)	(374)	(1,123)	(1,122)
Amortization of net loss	0	0	0	0
Net periodic benefit cost (benefit)	(248)	(252)	(743)	(756)
Settlements	0	0	0	0
Total net benefit cost	$ (248)	$ (252)	$ (743)	$ (756)

Pensions and Other Post-emplo_4

Pensions and Other Post-employment Benefits (Detail 1) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 42,000
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Contribution	$ 38,000	$ 8,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017	Jun. 29, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	$ (97,358)	$ (82,890)	$ (97,358)	$ (82,890)	$ (99,106)	$ (102,937)	$ (83,922)	$ (86,181)
Activity
Other comprehensive income (loss) before reclassifications	567	(258)	853	474
Amounts reclassified from accumulated other comprehensive income	1,647	1,684	5,473	3,692
Net current period other comprehensive income (loss) before tax	2,214	1,426	6,326	4,166
Deferred taxes on current period activity	466	394	747	875
Net current period other comprehensive income (loss) after tax	1,748	1,032	5,579	3,291
Pension and Post Employment Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(95,511)	(79,961)	(95,511)	(79,961)	(97,018)	(99,592)	(80,842)	(82,358)
Activity
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	1,935	1,345	5,183	3,655
Net current period other comprehensive income (loss) before tax	1,935	1,345	5,183	3,655
Deferred taxes on current period activity	428	464	1,102	1,258
Net current period other comprehensive income (loss) after tax	1,507	881	4,081	2,397
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(3,823)	(4,011)	(3,823)	(4,011)	(3,939)	(4,108)	(4,282)	(5,660)
Activity
Other comprehensive income (loss) before reclassifications	116	271	285	1,649
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive income (loss) before tax	116	271	285	1,649
Deferred taxes on current period activity	0	0	0	0
Net current period other comprehensive income (loss) after tax	116	271	285	1,649
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	1,976	1,082	1,976	1,082	1,851	763	1,202	1,837
Activity
Other comprehensive income (loss) before reclassifications	451	(529)	568	(1,175)
Amounts reclassified from accumulated other comprehensive income	(288)	339	290	37
Net current period other comprehensive income (loss) before tax	163	(190)	858	(1,138)
Deferred taxes on current period activity	38	(70)	(355)	(383)
Net current period other comprehensive income (loss) after tax	125	(120)	1,213	(755)
Forward Contract | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	1,545	1,177	1,545	1,177	1,582	959	1,109	1,837
Activity
Other comprehensive income (loss) before reclassifications	121	(324)	(206)	(1,205)
Amounts reclassified from accumulated other comprehensive income	(169)	433	250	219
Net current period other comprehensive income (loss) before tax	(48)	109	44	(986)
Deferred taxes on current period activity	(11)	41	(542)	(326)
Net current period other comprehensive income (loss) after tax	(37)	68	586	(660)
Precious Metal Contracts [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	431	(95)	431	(95)	$ 269	$ (196)	$ 93	$ 0
Activity
Other comprehensive income (loss) before reclassifications	330	(205)	774	30
Amounts reclassified from accumulated other comprehensive income	(119)	(94)	40	(182)
Net current period other comprehensive income (loss) before tax	211	(299)	814	(152)
Deferred taxes on current period activity	49	(111)	187	(57)
Net current period other comprehensive income (loss) after tax	$ 162	$ (188)	$ 627	$ (95)

Stock-based Compensation Expe_3

Stock-based Compensation Expense (Detail)	9 Months Ended
	Sep. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.58%
Dividend yield	0.80%
Volatility	31.90%
Expected term (in years)	5 years 6 months

Stock-based Compensation Expe_4

Stock-based Compensation Expense Textual (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 4.2	$ 1.5	$ 9.4	$ 6.2
Unearned Compensation	$ 9.2		$ 9.2
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period			65,112
Weighted average exercise price on SARs granted in period			$ 50.35
Grant date fair value per unit (in usd per share)			15.73
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per unit (in usd per share)			$ 50.35
Vesting period			3 years
Stock Compensation Plan [Member] | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period			59,222
Grant date fair value per unit (in usd per share)			$ 50.35
Vesting period			3 years
Director [Member] | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period			14,728
Grant date fair value per unit (in usd per share)			$ 51.60
Vesting period			1 year

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Financial Assets
Assets Fair Value Disclosure	$ 3,281	$ 2,578
Financial Liabilities
Liabilities Fair Value Disclosure	2,667	2,780
Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	2,400	2,310
Foreign Currency Forward Contract
Financial Liabilities
Liabilities Fair Value Disclosure	170	201
Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	97	269
Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	2,400	2,310
Financial Liabilities
Liabilities Fair Value Disclosure	2,400	2,310
Fair Value, Inputs, Level 1 | Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	2,400	2,310
Fair Value, Inputs, Level 1 | Foreign Currency Forward Contract
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2
Financial Assets
Assets Fair Value Disclosure	881	268
Financial Liabilities
Liabilities Fair Value Disclosure	267	470
Fair Value, Inputs, Level 2 | Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Foreign Currency Forward Contract
Financial Liabilities
Liabilities Fair Value Disclosure	170	201
Fair Value, Inputs, Level 2 | Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	97	269
Fair Value, Inputs, Level 3
Financial Assets
Assets Fair Value Disclosure	0	0
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Foreign Currency Forward Contract
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	0	0
Deferred Compensation Investments Assets
Financial Assets
Assets Fair Value Disclosure	2,400	2,310
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	2,400	2,310
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 2
Financial Assets
Assets Fair Value Disclosure	0	0
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 3
Financial Assets
Assets Fair Value Disclosure	0	0
Foreign Currency Forward Contract
Financial Assets
Assets Fair Value Disclosure	226	254
Foreign Currency Forward Contract | Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	0	0
Foreign Currency Forward Contract | Fair Value, Inputs, Level 2
Financial Assets
Assets Fair Value Disclosure	226	254
Foreign Currency Forward Contract | Fair Value, Inputs, Level 3
Financial Assets
Assets Fair Value Disclosure	0	0
Precious Metal Swaps
Financial Assets
Assets Fair Value Disclosure	655	14
Precious Metal Swaps | Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	0	0
Precious Metal Swaps | Fair Value, Inputs, Level 2
Financial Assets
Assets Fair Value Disclosure	655	14
Precious Metal Swaps | Fair Value, Inputs, Level 3
Financial Assets
Assets Fair Value Disclosure	$ 0	$ 0

Derivative Instruments and He_3

Derivative Instruments and Hedging Activity (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 48,649	$ 13,981
Derivative, Fair Value, Net	130	127
Euro Member Countries, Euro | Prepaid Expenses and Other Current Assets [Member] | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Notional Amount	11,622	13,981
Derivative Asset, Fair Value, Gross Asset	40	127
Euro Member Countries, Euro | Other Current Liabilities | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Notional Amount	37,027	0
Derivative Liability, Fair Value, Gross Liability	$ 170	$ 0

Derivative Instruments and He_4

Derivative Instruments and Hedging Activity (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 0.4	$ (0.5)	$ 1.6	$ (1.1)

Derivative Instruments and He_5

Derivative Instruments and Hedging Activity (Details 2) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative, Notional Amount	$ 13,634	$ 36,018
Derivative, Fair Value, Net	744	329
Prepaid Expenses and Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	12,422	10,699
Derivative Asset, Fair Value, Gross Asset	840	127
Prepaid Expenses and Other Current Assets [Member] | Precious Metal Swaps
Derivative [Line Items]
Derivative Asset, Notional Amount	7,198	0
Derivative Asset, Fair Value, Gross Asset	654	0
Other Assets [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	246	880
Derivative Asset, Fair Value, Gross Asset	1	14
Other Assets [Member] | Precious Metal Swaps
Derivative [Line Items]
Derivative Asset, Notional Amount	246	880
Derivative Asset, Fair Value, Gross Asset	1	14
Other Current Liabilities
Derivative [Line Items]
Derivative Liability, Notional Amount	845	23,650
Derivative Liability, Fair Value, Gross Liability	94	456
Other Current Liabilities | Precious Metal Swaps
Derivative [Line Items]
Derivative Liability, Notional Amount	845	10,067
Derivative Liability, Fair Value, Gross Liability	94	255
Other Noncurrent Liabilities [Member] | Precious Metal Swaps
Derivative [Line Items]
Derivative Liability, Notional Amount	121	789
Derivative Liability, Fair Value, Gross Liability	3	14
Japan, Yen | Prepaid Expenses and Other Current Assets [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	1,413	5,673
Derivative Asset, Fair Value, Gross Asset	44	91
Japan, Yen | Other Current Liabilities | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Euro Member Countries, Euro | Prepaid Expenses and Other Current Assets [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	3,811	5,026
Derivative Asset, Fair Value, Gross Asset	142	36
Euro Member Countries, Euro | Other Current Liabilities | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	0	13,583
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 201

Derivative Instruments and He_6

Derivative Instruments and Hedging Activity (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ 0	$ 0	$ 0	$ 0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			$ 0.6	$ (1.2)

Contingencies (Detail)

Contingencies (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Significant Assumptions	The reserves are established based upon analyses conducted by the Company’s engineers and outside consultants and are adjusted from time to time based upon ongoing studies, the difference between actual and estimated costs, and other factors. The reserves may also be affected by rulings and negotiations with regulatory agencies.
Undiscounted reserve balance	$ 6.5	$ 6.5