Materion (MTRN) 10-Q 25 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 28, 2019shares
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 28, 2019
Document Transition Report	false
Entity File Number	001-15885
Entity Registrant Name	MATERION CORPORATION
Local Phone Number	486-4200
Title of 12(b) Security	Common Stock, no par value
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	34-1919973
Entity Address, Address Line One	6070 Parkland Blvd
Entity Address, City or Town	Mayfield Heights
Entity Address, State or Province	OH
City Area Code	216
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Address, Postal Zip Code	44124
Entity Central Index Key	0001104657
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	MTRN
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding	20,399,425
Security Exchange Name	NYSE

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Statement [Abstract]
Net sales	$ 297,843	$ 309,085	$ 599,284	$ 612,552
Cost of sales	228,249	247,247	460,378	492,434
Gross margin	69,594	61,838	138,906	120,118
Selling, general, and administrative expense	39,891	38,473	79,955	76,935
Research and development expense	4,062	3,860	7,802	7,503
Other net	2,891	4,313	7,012	7,237
Operating profit	22,750	15,192	44,137	28,443
Interest expense—net	500	667	966	1,397
Other non-operating expense - net	3,112	437	3,357	879
Income before income taxes	19,138	14,088	39,814	26,167
Income tax expense	3,598	2,944	7,368	4,459
Net income	$ 15,540	$ 11,144	$ 32,446	$ 21,708
Basic earnings per share:
Net income per share of common stock (in dollars per share)	$ 0.76	$ 0.55	$ 1.60	$ 1.08
Diluted earnings per share:
Net income per share of common stock (in dollars per share)	$ 0.75	$ 0.54	$ 1.57	$ 1.05
Weighted-average number of shares of common stock outstanding:
Basic (in shares)	20,383	20,221	20,326	20,178
Diluted (in shares)	20,666	20,593	20,635	20,583

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 15,540	$ 11,144	$ 32,446	$ 21,708
Other comprehensive income (loss):
Foreign currency translation adjustment	339	(944)	(164)	169
Derivative and hedging activity, net of tax	(1,000)	1,763	(73)	1,088
Pension and post-employment benefit adjustment, net of tax	13,953	1,296	14,493	2,574
Net current period other comprehensive income (loss) after tax	13,292	2,115	14,256	3,831
Comprehensive income	$ 28,832	$ 13,259	$ 46,702	$ 25,539

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 74,856	$ 70,645
Accounts receivable	142,327	130,538
Inventories, net	213,329	214,871
Prepaid and other current assets	23,904	23,299
Total current assets	454,416	439,353
Deferred income taxes	1,052	5,616
Property, Plant and Equipment	913,325	898,251
Less allowances for depreciation, depletion, and amortization	(669,861)	(647,233)
Property, plant, and equipment—net	243,464	251,018
Operating lease, right-of-use asset	26,788	0
Intangible assets	5,213	6,461
Other assets	15,280	7,236
Goodwill	90,633	90,657
Total Assets	836,846	800,341
Current liabilities
Short-term debt	847	823
Accounts payable	41,658	49,622
Salaries and wages	36,250	47,501
Other liabilities and accrued items	38,482	33,301
Income taxes	1,971	2,615
Unearned revenue	5,829	5,918
Total current liabilities	125,037	139,780
Other long-term liabilities	11,419	14,764
Operating lease liabilities	21,118	0
Finance lease liabilities	18,325	15,221
Retirement and post-employment benefits	30,663	38,853
Unearned income	30,354	32,563
Long-term income taxes	3,093	2,993
Deferred income taxes	383	195
Long-term debt	1,669	2,066
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 June 28 and December 31)	245,785	234,704
Retained earnings	576,211	548,374
Common stock in treasury	(187,224)	(175,426)
Accumulated other comprehensive loss	(43,978)	(58,234)
Other equity	3,991	4,488
Total shareholders' equity	594,785	553,906
Total Liabilities and Shareholders’ Equity	$ 836,846	$ 800,341

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands, $ / shares in Thousands	Jun. 28, 2019	Dec. 31, 2018
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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Cash flows from operating activities:
Net income	$ 32,446	$ 21,708
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	22,607	18,349
Amortization of deferred financing costs in interest expense	472	514
Stock-based compensation expense (non-cash)	3,541	2,164
Deferred income tax expense (benefit)	4,578	429
Pension curtailment	3,296	0
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	(11,778)	(12,060)
Decrease (increase) in inventory	1,306	10,428
Decrease (increase) in prepaid and other current assets	(588)	4,928
Increase (decrease) in accounts payable and accrued expenses	(18,813)	(14,189)
Increase (Decrease) in Unearned Revenue	(88)	2,132
Increase (decrease) in interest and taxes payable	(1,130)	2,084
Domestic pension plan contributions	(3,000)	(13,000)
Other-net	(2,803)	5,817
Net cash used in operating activities	30,046	29,304
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(13,833)	(17,153)
Payments for mine development	(1,591)	(3,425)
Proceeds from sale of property, plant, and equipment	15	27
Net cash used in investing activities	(15,409)	(20,551)
Cash flows from financing activities:
Repayment of long-term debt	(397)	(383)
Principal payments under finance lease obligations	599	425
Cash dividends paid	(4,368)	(4,137)
Repurchase of common stock	(199)	0
Payments of withholding taxes for stock-based compensation awards	(4,763)	(2,765)
Net cash used in financing activities	(10,326)	(7,710)
Effects of exchange rate changes	(100)	8
Net change in cash and cash equivalents	4,211	1,051
Cash and cash equivalents at beginning of period	70,645	41,844
Cash and cash equivalents at end of period	$ 74,856	$ 42,895

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Common Shares Held In Treasury	Common Stock	Retained Earnings	Common Stock In Treasury	Accumulated Other Comprehensive Income (Loss)	Other Equity
Beginning balance (in shares) at Dec. 31, 2017		20,107
Beginning balances (in Treasury shares) at Dec. 31, 2017			(7,042)
Beginning balances at Dec. 31, 2017	$ 494,981			$ 223,484	$ 536,116	$ (166,128)	$ (102,937)	$ 4,446
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,708			0	21,708	0	0	0
Other comprehensive income (loss)	3,256			0	0	0	3,256	0
Pension curtailment	0
Tax Cuts and Jobs Act of 2017 Reclassification From Aoci to Retained Earnings	0			0	(575)	0	575	0
Cumulative effect of accounting change	425			0	425	0	0	0
Cash dividends declared	(4,137)			0	(4,137)	0	0	0
Stock-based compensation activity (in shares)		181	181
Stock-based compensation activity	2,164			7,220	(14)	(5,042)	0	0
Payments of withholding taxes for stock-based compensation awards (in shares)		(53)	(53)
Payments of withholding taxes for stock-based compensation awards	(2,765)			0	0	(2,765)	0	0
Directors' deferred compensation	109	$ 1	$ 2	59	0	110	0	(60)
Ending balance (in shares) at Jun. 29, 2018		20,236
Ending balances (in Treasury shares) at Jun. 29, 2018			(6,912)
Ending balances at Jun. 29, 2018	515,741			230,763	553,523	(173,825)	(99,106)	4,386
Beginning balance (in shares) at Mar. 30, 2018		20,191
Beginning balances (in Treasury shares) at Mar. 30, 2018			(6,958)
Beginning balances at Mar. 30, 2018	504,329			227,694	545,093	(171,574)	(101,221)	4,337
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,144			0	11,144	0	0	0
Other comprehensive income (loss)	1,540			0	0	0	1,540	0
Tax Cuts and Jobs Act of 2017 Reclassification From Aoci to Retained Earnings	0			0	(575)	0	575	0
Cumulative effect of accounting change	0			0	0	0	0	0
Cash dividends declared	(2,125)			0	(2,125)	0	0	0
Stock-based compensation activity (in shares)		55	55
Stock-based compensation activity	1,393			3,020	(14)	(1,613)	0	0
Payments of withholding taxes for stock-based compensation awards (in shares)		(11)	(11)
Payments of withholding taxes for stock-based compensation awards	(632)			0	0	(632)	0	0
Directors' deferred compensation	92	$ 1	$ 2	49	0	(6)	0	49
Ending balance (in shares) at Jun. 29, 2018		20,236
Ending balances (in Treasury shares) at Jun. 29, 2018			(6,912)
Ending balances at Jun. 29, 2018	515,741			230,763	553,523	(173,825)	(99,106)	4,386
Beginning balance (in shares) at Dec. 31, 2018		20,242
Beginning balances (in Treasury shares) at Dec. 31, 2018			(6,906)
Beginning balances at Dec. 31, 2018	553,906			234,704	548,374	(175,426)	(58,234)	4,488
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	32,446			0	32,446	0	0	0
Other comprehensive income (loss)	10,960			0	0	0	10,960	0
Pension curtailment	3,296			0	0	0	3,296	0
Cumulative effect of accounting change	(179)			0	(179)	0	0	0
Cash dividends declared	(4,368)			0	(4,368)	0	0	0
Stock-based compensation activity (in shares)		247	247
Stock-based compensation activity	3,541			11,046	(62)	(7,443)	0	0
Payments of withholding taxes for stock-based compensation awards (in shares)		(87)	(87)
Payments of withholding taxes for stock-based compensation awards	(4,763)			0	0	(4,763)	0	0
Repurchase of shares (in shares)		(5)	(5)
Repurchase of shares	(199)			0	0	(199)	0	0
Directors' deferred compensation	145	$ 2	$ 2	35	0	607	0	(497)
Ending balance (in shares) at Jun. 28, 2019		20,399
Ending balances (in Treasury shares) at Jun. 28, 2019			(6,749)
Ending balances at Jun. 28, 2019	594,785			245,785	576,211	(187,224)	(43,978)	3,991
Beginning balance (in shares) at Mar. 29, 2019		20,354
Beginning balances (in Treasury shares) at Mar. 29, 2019			(6,794)
Beginning balances at Mar. 29, 2019	566,877			241,480	562,941	(184,812)	(57,270)	4,538
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,540			0	15,540	0	0	0
Other comprehensive income (loss)	9,996			0	0	0	9,996	0
Pension curtailment	3,296			0	0	0	3,296	0
Cash dividends declared	(2,243)			0	(2,243)	0	0	0
Stock-based compensation activity (in shares)		55	55
Stock-based compensation activity	1,994			4,287	(27)	(2,266)	0	0
Payments of withholding taxes for stock-based compensation awards (in shares)		(12)	(12)
Payments of withholding taxes for stock-based compensation awards	(785)			0	0	(785)	0	0
Repurchase of shares (in shares)		0	0
Repurchase of shares	0			0	0	0	0	0
Directors' deferred compensation	110	$ 2	$ 2	18	0	639	0	(547)
Ending balance (in shares) at Jun. 28, 2019		20,399
Ending balances (in Treasury shares) at Jun. 28, 2019			(6,749)
Ending balances at Jun. 28, 2019	$ 594,785			$ 245,785	$ 576,211	$ (187,224)	$ (43,978)	$ 3,991

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (per share)	$ 0.110	$ 0.105	$ 0.215	$ 0.205

Accounting Policies

Accounting Policies	6 Months Ended
	Jun. 28, 2019
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 2019 consolidated financial statement presentation. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company's 2018 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 February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02 (Topic 842), Leases , which eliminates the off-balance-sheet accounting for leases. This guidance requires lessees to report their operating leases as both an asset and liability on the balance sheet and disclose key information about leasing arrangements. The Company adopted this guidance as of January 1, 2019 using the modified retrospective method and applied it retrospectively through a cumulative-effect adjustment to retained earnings. The Company applied the transitional package of practical expedients allowed by the standard to not reassess the identification, classification, and initial direct costs of leases commencing before this ASU's effective date; however, the Company did not elect the hindsight transitional practical expedient. The Company also applied the practical expedient to not separate lease and non-lease components to new leases as well as existing leases through transition. The Company made an accounting policy election not to apply recognition requirements of the guidance to short-term leases. Results for reporting periods beginning after January 1, 2019 are presented under Topic 842, while prior period amounts are not adjusted and continue to be reported in accordance with legacy generally accepted accounting principles. The Company recorded a net reduction to opening retained earnings of $0.2 million as of January 1, 2019 due to the cumulative impact of adopting Topic 842, with the impact primarily related to derecognition of a built-to-suit lease. Refer to Note H for additional disclosures relating to the Company's leasing arrangements. 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. The Company adopted this guidance as of January 1, 2019, and the adoption did not have a material effect on the Company’s consolidated financial statements. New Pronouncements Issued: In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . This ASU requires an entity to change its accounting approach in determining impairment of certain financial instruments, including trade receivables, from an “incurred loss” to a “current expected credit loss” model. The standard will be effective for fiscal years beginning after December 15, 2019, including interim periods within such fiscal years. Early adoption is permitted. The Company is currently assessing the effect that this ASU will have on its financial position, results of operations, and disclosures.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 28, 2019
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 Second Quarter 2019 Net sales $ 135,231 $ 133,238 $ 29,374 $ — $ 297,843 Intersegment sales 6 19,260 — — 19,266 Operating profit (loss) 19,328 6,139 3,937 (6,654 ) 22,750 Second Quarter 2018 Net sales $ 129,765 $ 150,324 $ 28,996 $ — $ 309,085 Intersegment sales 3 11,400 — — 11,403 Operating profit (loss) 12,309 5,572 2,233 (4,922 ) 15,192 First Six Months 2019 Net sales $ 262,344 $ 277,263 $ 59,677 $ — $ 599,284 Intersegment sales 15 36,473 — — 36,488 Operating profit (loss) 38,286 13,219 6,014 (13,382 ) 44,137 First Six Months 2018 Net sales $ 248,001 $ 303,869 $ 60,682 $ — $ 612,552 Intersegment sales 31 23,052 — — 23,083 Operating profit (loss) 22,170 11,470 5,608 (10,805 ) 28,443 In the second quarter of 2019, the Company recategorized its end markets based on the ongoing refinement of its go-to-market strategy. The changes reflect new processes designed to enable the Company to better serve global customers and growth markets. The following table disaggregates revenue for each segment by end market for the second quarter and first six months of 2019 and 2018, respectively: (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Second Quarter 2019 End Market Semiconductor $ 1,303 $ 100,758 $ 93 $ — $ 102,154 Industrial 28,585 7,704 3,842 — 40,131 Aerospace and Defense 26,046 1,125 4,750 — 31,921 Consumer Electronics 22,663 500 4,430 — 27,593 Automotive 16,564 1,669 365 — 18,598 Energy 11,303 16,027 — — 27,330 Telecom and Data Center 18,244 713 — — 18,957 Other 10,523 4,742 15,894 — 31,159 Total $ 135,231 $ 133,238 $ 29,374 $ — $ 297,843 Second Quarter 2018 End Market Semiconductor $ 1,299 $ 118,525 $ 428 $ — $ 120,252 Industrial 28,974 7,951 3,171 — 40,096 Aerospace and Defense 25,964 1,010 4,960 — 31,934 Consumer Electronics 16,150 174 5,021 — 21,345 Automotive 23,236 1,804 469 — 25,509 Energy 9,825 12,069 — — 21,894 Telecom and Data Center 17,784 566 — — 18,350 Other 6,533 8,225 14,947 — 29,705 Total $ 129,765 $ 150,324 $ 28,996 $ — $ 309,085 (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total First Six Months 2019 End Market Semiconductor $ 3,268 $ 205,125 $ 205 $ — $ 208,598 Industrial 55,015 15,635 7,992 — 78,642 Aerospace and Defense 53,120 2,618 9,622 — 65,360 Consumer Electronics 36,218 705 7,916 — 44,839 Automotive 37,277 3,023 587 — 40,887 Energy 22,397 38,190 — — 60,587 Telecom and Data Center 35,836 914 — — 36,750 Other 19,213 11,053 33,355 — 63,621 Total $ 262,344 $ 277,263 $ 59,677 $ — $ 599,284 First Six Months 2018 End Market Semiconductor $ 2,387 $ 226,842 $ 971 $ — $ 230,200 Industrial 58,577 15,416 5,899 — 79,892 Aerospace and Defense 44,246 2,020 9,644 — 55,910 Consumer Electronics 31,455 626 9,291 — 41,372 Automotive 46,773 4,184 691 — 51,648 Energy 17,612 33,480 — — 51,092 Telecom and Data Center 32,647 1,031 — — 33,678 Other 14,304 20,270 34,186 — 68,760 Total $ 248,001 $ 303,869 $ 60,682 $ — $ 612,552 Intersegment sales are eliminated in consolidation.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 28, 2019
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. Transaction Price Allocated to Future Performance Obligations: Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers, requires that the Company disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied at June 28, 2019. 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 June 28, 2019, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $19.6 million . Contract Balances : The timing of revenue recognition, billings, and cash collections resulted in the following contract assets and contract liabilities: (Thousands) June 28, 2019 December 31, 2018 $ change % change Accounts receivable, trade $ 132,493 $ 124,498 $ 7,995 6 % Unbilled receivables 9,430 4,619 4,811 104 % Unearned revenue 5,829 5,918 (89 ) (2 )% 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 second quarter and first six months of 2019. 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. The Company recognized approximately $5.0 million of the unearned amounts as revenue during the first six months of 2019. 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.

Other-net

Other-net	6 Months Ended
	Jun. 28, 2019
Other Income and Expenses [Abstract]
Other-net	Other-net Other-net expense for the second quarter and first six months of of 2019 and 2018 is summarized as follows: Second Quarter Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Metal consignment fees $ 2,225 $ 2,588 $ 5,316 $ 5,017 Amortization of intangible assets 368 561 758 1,334 Foreign currency loss 307 1,230 384 1,219 Net loss (gain) on disposal of fixed assets 118 (3 ) 142 23 Rental income (29 ) (134 ) (58 ) (260 ) Other items (98 ) 71 470 (96 ) Total $ 2,891 $ 4,313 $ 7,012 $ 7,237

Income Taxes

Income Taxes	6 Months Ended
	Jun. 28, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's effective tax rate for the second quarter of 2019 and 2018 was 18.8% and 20.9% , respectively, and 18.5% and 17.0% for the first six months of 2019 and 2018, respectively. The effective tax rate for each period is lower than the statutory tax rate primarily due to the impact of percentage depletion and the research and development credit. Additionally, the effective tax rate for the first six months of 2019 included a net discrete income tax benefit of $0.5 million, primarily related to excess tax benefits from stock-based compensation. The effective tax rate for the first six months of 2018 included a net discrete income tax benefit of $1.0 million, primarily related to Staff Accounting Bulletin (SAB) No. 118 adjustments.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share (EPS) The following table sets forth the computation of basic and diluted EPS: Second Quarter Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands, except per share amounts) 2019 2018 2019 2018 Numerator for basic and diluted EPS: Net income $ 15,540 $ 11,144 $ 32,446 $ 21,708 Denominator: Denominator for basic EPS: Weighted-average shares outstanding 20,383 20,221 20,326 20,178 Effect of dilutive securities: Stock appreciation rights 76 166 92 185 Restricted stock units 76 75 77 85 Performance-based restricted stock units 131 131 140 135 Diluted potential common shares 283 372 309 405 Denominator for diluted EPS: Adjusted weighted-average shares outstanding 20,666 20,593 20,635 20,583 Basic EPS $ 0.76 $ 0.55 $ 1.60 $ 1.08 Diluted EPS $ 0.75 $ 0.54 $ 1.57 $ 1.05 Securities totaling 84,509 and 65,112 for the quarters ended June 28, 2019 and June 29, 2018 , respectively, and 144,154 and 65,112 for the six months ended June 28, 2019 and June 29, 2018, respectively, were excluded from the dilution calculation as their effect would have been anti-dilutive.

Inventories

Inventories	6 Months Ended
	Jun. 28, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories on the Consolidated Balance Sheets are summarized as follows: June 28, December 31, (Thousands) 2019 2018 Raw materials and supplies $ 38,425 $ 33,182 Work in process 190,428 195,879 Finished goods 32,062 30,643 Subtotal $ 260,915 $ 259,704 Less: LIFO reserve balance 47,586 44,833 Inventories $ 213,329 $ 214,871 The liquidation of last in, first out (LIFO) inventory layers increased cost of sales by $0.1 million in the second quarter and first six months of both 2019 and 2018. The Company maintains the majority of the precious metals and copper used in production on a consignment basis in order to reduce our exposure to metal price movements and to reduce our working capital investment. The notional value of off-balance sheet precious metals and copper was $295.7 million as of June 28, 2019 versus $316.1 million as of December 31, 2018.

Leases

Leases	6 Months Ended
	Jun. 28, 2019
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]	Leases The Company leases warehouse and manufacturing real estate, and manufacturing and computer equipment under operating leases with lease terms ranging up to 25 years . Several operating lease agreements contain options to extend the lease term and/or options for early termination. The lease term consists of the non-cancelable period of the lease, periods covered by options to extend the lease if the Company is reasonably certain to exercise the option, and periods covered by an option to terminate the lease if the Company is reasonably certain not to exercise the option. The weighted average remaining lease term for the Company's operating and finance leases as of June 28, 2019 was 5.09 years and 19.87 years , respectively. The discount rate implicit within the leases is generally not determinable, and, therefore, the Company determines the discount rate based on its incremental borrowing rate. The incremental borrowing rate for leases is determined based on the lease term in which lease payments are made, adjusted for impacts of collateral. The weighted average discount rate used to measure the Company's operating and finance lease liabilities as of June 28, 2019 was 5.55% and 5.31% , respectively. The components of operating and finance lease cost for the second quarter and first six months of 2019 were as follows: Second Quarter Ended Six Months Ended June 28, June 28, (Thousands) 2019 2019 Components of lease expense Operating lease cost $ 2,291 $ 5,003 Finance lease cost Amortization of right-of-use assets 354 710 Interest on lease liabilities 259 522 Total lease cost $ 2,904 $ 6,235 Operating lease expense amounted to $2.3 million and $3.0 million during the second quarter of 2019 and 2018, respectively, and $5.0 million and $6.1 million during the first six months of 2019 and 2018, respectively. The Company straight-lines its expense of fixed payments for operating leases over the lease term and expenses the variable lease payments in the period incurred. These variable lease payments are not included in the calculation of right-of-use assets or lease liabilities. Supplemental balance sheet information related to the Company's operating and finance leases as of June 28, 2019 was as follows: June 28, (Thousands) 2019 Supplemental balance sheet information Operating Leases Operating lease right-of-use assets $ 26,788 Other liabilities and accrued items 6,927 Operating lease liabilities 21,118 Finance Leases Property, plant, and equipment $ 26,330 Allowances for depreciation, depletion, and amortization (3,140 ) Finance lease assets, net $ 23,190 Other liabilities and accrued items $ 1,238 Finance lease liabilities 18,325 Total principal payable on finance leases $ 19,563 Future maturities of the Company's lease liabilities as of June 28, 2019 are as follows: Finance Operating (Thousands) Leases Leases 2019 $ 1,122 $ 4,201 2020 2,244 7,618 2021 2,244 6,619 2022 2,244 4,727 2023 1,534 3,818 2024 and thereafter 22,414 5,148 Total lease payments 31,802 32,131 Less amount of lease payment representing interest 12,239 4,086 Total present value of lease payments $ 19,563 $ 28,045 Supplemental cash flow information related to leases for the first six months of 2019 was as follows: Six Months Ended June 28, (Thousands) 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7,710 Operating cash flows from finance leases 522 Financing cash flows from finance leases 599

Pensions and Other Post-employm

Pensions and Other Post-employment Benefits	6 Months Ended
	Jun. 28, 2019
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 second quarter of 2019 and 2018 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 Second Quarter Ended Second Quarter Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Components of net periodic benefit cost (benefit) Service cost $ 1,418 $ 1,674 $ 18 $ 28 Interest cost 1,347 2,397 99 99 Expected return on plan assets (2,167 ) (3,697 ) — — Amortization of prior service benefit 122 (30 ) (375 ) (374 ) Amortization of net loss (gain) 627 1,959 (23 ) — Pension curtailment charge 3,296 — — — Net periodic benefit cost (benefit) $ 4,643 $ 2,303 $ (281 ) $ (247 ) Pension Benefits Other Benefits Six Months Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Components of net periodic benefit cost (benefit) Service cost $ 2,758 $ 3,348 $ 35 $ 56 Interest cost 2,904 4,794 199 198 Expected return on plan assets (4,290 ) (7,394 ) — — Amortization of prior service benefit 242 (61 ) (749 ) (749 ) Amortization of net loss (gain) 1,431 3,919 (46 ) — Pension curtailment charge 3,296 — — — Net periodic benefit cost (benefit) $ 6,341 $ 4,606 $ (561 ) $ (495 ) The Company made contributions to the domestic defined benefit pension plan of $3.0 million and $13.0 million in the six months of 2019 and 2018 , respectively. 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. In May 2019, the Company's Board of Directors approved changes to the U.S. defined benefit pension plan. The Company will freeze the pay and service amounts used to calculate pension benefits for active participants in the pension plan as of January 1, 2020. The Company recognized a non-cash pre-tax pension curtailment charge of $3.3 million

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 28, 2019
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 second quarter of 2019 and 2018 and first six months of 2019 and 2018 are as follows: Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Copper Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at March 29, 2019 $ 1,663 $ (24 ) $ 189 $ 1,828 $ (54,003 ) $ (5,095 ) $ (57,270 ) Other comprehensive income before reclassifications (269 ) (563 ) (580 ) (1,412 ) 14,224 339 13,151 Amounts reclassified from accumulated other comprehensive income (46 ) (1 ) 163 116 3,781 — 3,897 Net current period other comprehensive income (loss) before tax (315 ) (564 ) (417 ) (1,296 ) 18,005 339 17,048 Deferred taxes (72 ) (130 ) (94 ) (296 ) 4,052 — 3,756 Net current period other comprehensive income (loss) after tax (243 ) (434 ) (323 ) (1,000 ) 13,953 339 13,292 Balance at June 28, 2019 $ 1,420 $ (458 ) $ (134 ) $ 828 $ (40,050 ) $ (4,756 ) $ (43,978 ) Balance at March 30, 2018 $ 326 $ (238 ) $ — $ 88 $ (98,314 ) $ (2,995 ) $ (101,221 ) Other comprehensive income (loss) before reclassifications 871 635 — 1,506 — (944 ) 562 Amounts reclassified from accumulated other comprehensive income 42 23 — 65 1,622 — 1,687 Net current period other comprehensive income (loss) before tax 913 658 — 1,571 1,622 (944 ) 2,249 Deferred taxes (343 ) 151 — (192 ) 326 — 134 Net current period other comprehensive income (loss) after tax 1,256 507 — 1,763 1,296 (944 ) 2,115 Balance at June 29, 2018 $ 1,582 $ 269 $ — $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 ) Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Copper Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at December 31, 2018 $ 1,263 $ 79 $ (441 ) $ 901 $ (54,543 ) $ (4,592 ) $ (58,234 ) Other comprehensive income before reclassifications 248 (636 ) 304 (84 ) 14,224 (164 ) 13,976 Amounts reclassified from accumulated other comprehensive income (44 ) (62 ) 92 (14 ) 4,441 — 4,427 Net current period other comprehensive income (loss) before tax 204 (698 ) 396 (98 ) 18,665 (164 ) 18,403 Deferred taxes 47 (161 ) 89 (25 ) 4,172 — 4,147 Net current period other comprehensive income (loss) after tax 157 (537 ) 307 (73 ) 14,493 (164 ) 14,256 Balance at June 28, 2019 $ 1,420 $ (458 ) $ (134 ) $ 828 $ (40,050 ) $ (4,756 ) $ (43,978 ) Balance at December 31, 2017 $ 959 $ (196 ) $ — $ 763 $ (99,592 ) $ (4,108 ) $ (102,937 ) Other comprehensive income (loss) before reclassifications (327 ) 444 — 117 — 169 286 Amounts reclassified from accumulated other comprehensive income 419 159 — 578 3,248 — 3,826 Net current period other comprehensive income (loss) before tax 92 603 — 695 3,248 169 4,112 Deferred taxes (531 ) 138 — (393 ) 674 — 281 Net current period other comprehensive income (loss) after tax 623 465 — 1,088 2,574 169 3,831 Balance at June 29, 2018 $ 1,582 $ 269 $ — $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 ) Reclassifications from accumulated other comprehensive income of gains and losses on foreign currency cash flow hedges are recorded in Net sales 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.

Stock-based Compensation Expens

Stock-based Compensation Expense	6 Months Ended
	Jun. 28, 2019
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 $3.5 million and $6.2 million in the second quarter and first six months of 2019 , respectively, compared to $2.7 million and $5.2 million in same periods of 2018. The Company granted 73,461 stock appreciation rights (SARs) to certain employees during the first six months of 2019 . The weighted-average exercise price per share and weighted-average fair value per share of the SARs granted during the six months ended June 28, 2019 were $58.30 and $17.76 , 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 2.47 % Dividend yield 0.7 % Volatility 31.7 % Expected term (in years) 5.2 The Company granted 63,665 stock-settled restricted stock units (RSUs) to certain employees and 11,048 stock-settled RSUs to non-employee directors during the first six months of 2019 . 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 $58.30 and $68.79 for stock-settled RSUs granted to employees and non-employee directors, respectively, during the six months ended June 28, 2019 . 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 six months of 2019 . The weighted-average fair value of the stock-settled PRSUs was $69.84 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 June 28, 2019 , unamortized compensation cost related to the unvested portion of all stock-based awards was approximately $13.6 million

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 28, 2019
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 June 28, 2019 and December 31, 2018 : (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) 2019 2018 2019 2018 2019 2018 2019 2018 Financial Assets Deferred compensation investments $ 3,121 $ 2,156 $ 3,121 $ 2,156 $ — $ — $ — $ — Foreign currency forward contracts 119 246 — — 119 246 — — Precious metal swaps — 237 — — — 237 — — Copper swaps 9 — — — 9 — — — Total $ 3,249 $ 2,639 $ 3,121 $ 2,156 $ 128 $ 483 $ — $ — Financial Liabilities Deferred compensation liability $ 3,121 $ 2,156 $ 3,121 $ 2,156 $ — $ — $ — $ — Foreign currency forward contracts 121 432 — — 121 432 — — Precious metal swaps 596 135 — — 596 135 — — Copper swaps 182 569 — — 182 569 — — Total $ 4,020 $ 3,292 $ 3,121 $ 2,156 $ 899 $ 1,136 $ — $ — 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 June 28, 2019 and December 31, 2018.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activity	6 Months Ended
	Jun. 28, 2019
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 and copper 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. Copper. We also use copper in our production processes. When possible, fluctuations in the purchase price of copper are passed on to customers in the form of price adders or reductions. While over time our price exposure to copper is generally in balance, there can be a lag between the change in our cost and the pass-through to our customers, resulting in higher or lower margins in a given period. To mitigate this impact, we hedge a portion of this pricing risk. 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. 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 (on a gross basis) and balance sheet classification as of June 28, 2019 and December 31, 2018 : June 28, 2019 December 31, 2018 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Foreign currency forward contracts - euro Prepaid expenses $ 2,421 $ 27 $ 8,767 $ 244 Other liabilities and accrued items 3,836 52 8,771 249 These outstanding foreign currency derivatives were related to intercompany loans. Other-net included no foreign currency impact relating to these derivatives during both the second quarter and the first six months of 2019 and included $1.6 million and $1.1 million of foreign currency gains during the second quarter and first six months of 2018, respectively. The following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives designated as cash flow hedges (on a gross basis) and balance sheet classification as of June 28, 2019 and December 31, 2018 : June 28, 2019 December 31, 2018 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Prepaid expenses Foreign currency forward contracts - yen $ 1,465 $ 9 $ — $ — Foreign currency forward contracts - euro 7,475 83 725 2 Precious metal swaps — — 4,533 237 Copper swaps 977 9 — — Total 9,917 101 5,258 239 Other liabilities and accrued items Foreign currency forward contracts - yen 2,065 35 1,264 17 Foreign currency forward contracts - euro 7,459 34 19,158 166 Precious metal swaps 6,828 573 2,864 135 Copper swaps 4,359 182 11,170 569 Total 20,711 824 34,456 887 Other long-term liabilities Precious metal swaps 697 23 — — Total $ 31,325 $ 746 $ 39,714 $ 648 All of these contracts were designated and effective as cash flow hedges. The Company expects to relieve substantially the entire balance in OCI as of June 28, 2019 to the Consolidated Statements of Income within the next 15-month period. Refer to Note J for additional OCI details. The following table summarizes the amounts reclassified from accumulated other comprehensive income relating to the hedging relationship of the Company’s outstanding derivatives designated as cash flow hedges and income statement classification as of the second quarter and first six months of of 2019 : Second Quarter Ended Six Months ended (Thousands) June 28, 2019 June 28, 2019 Hedging relationship Line item Foreign currency forward contracts Net sales (46 ) (44 ) Precious metal swaps Cost of sales (1 ) (62 ) Copper swaps Cost of sales 163 92 Total $ 116 $ (14 )

Contingencies

Contingencies - USD ($) $ in Millions	6 Months Ended
	Jun. 28, 2019	Dec. 31, 2018
Loss Contingency [Abstract]
Undiscounted reserve balance	$ 6.2	$ 6.5
Commitments and Contingencies Disclosure [Text Block]	Contingencies Legal Proceedings . For information regarding legal proceedings relating to Chronic Beryllium Disease Claims , refer to Note S ("Contingencies and Commitments") in the Company's 2018 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 $6.2 million and $6.5 million at June 28, 2019 and December 31, 2018 , respectively. 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)	6 Months Ended
	Jun. 28, 2019
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 2019 consolidated financial statement presentation. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company's 2018 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)	6 Months Ended
	Jun. 28, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements	New Pronouncements Adopted: In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02 (Topic 842), Leases , which eliminates the off-balance-sheet accounting for leases. This guidance requires lessees to report their operating leases as both an asset and liability on the balance sheet and disclose key information about leasing arrangements. The Company adopted this guidance as of January 1, 2019 using the modified retrospective method and applied it retrospectively through a cumulative-effect adjustment to retained earnings. The Company applied the transitional package of practical expedients allowed by the standard to not reassess the identification, classification, and initial direct costs of leases commencing before this ASU's effective date; however, the Company did not elect the hindsight transitional practical expedient. The Company also applied the practical expedient to not separate lease and non-lease components to new leases as well as existing leases through transition. The Company made an accounting policy election not to apply recognition requirements of the guidance to short-term leases. Results for reporting periods beginning after January 1, 2019 are presented under Topic 842, while prior period amounts are not adjusted and continue to be reported in accordance with legacy generally accepted accounting principles. The Company recorded a net reduction to opening retained earnings of $0.2 million as of January 1, 2019 due to the cumulative impact of adopting Topic 842, with the impact primarily related to derecognition of a built-to-suit lease. Refer to Note H for additional disclosures relating to the Company's leasing arrangements. 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. The Company adopted this guidance as of January 1, 2019, and the adoption did not have a material effect on the Company’s consolidated financial statements. New Pronouncements Issued: In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . This ASU requires an entity to change its accounting approach in determining impairment of certain financial instruments, including trade receivables, from an “incurred loss” to a “current expected credit loss” model. The standard will be effective for fiscal years beginning after December 15, 2019, including interim periods within such fiscal years. Early adoption is permitted. The Company is currently assessing the effect that this ASU will have on its financial position, results of operations, and disclosures.

Revenue Recognition Accounting

Revenue Recognition Accounting Policy (Policies)	6 Months Ended
	Jun. 28, 2019
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. Transaction Price Allocated to Future Performance Obligations: Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers,

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 28, 2019
Segment Reporting [Abstract]
Segment Reporting	(Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Second Quarter 2019 Net sales $ 135,231 $ 133,238 $ 29,374 $ — $ 297,843 Intersegment sales 6 19,260 — — 19,266 Operating profit (loss) 19,328 6,139 3,937 (6,654 ) 22,750 Second Quarter 2018 Net sales $ 129,765 $ 150,324 $ 28,996 $ — $ 309,085 Intersegment sales 3 11,400 — — 11,403 Operating profit (loss) 12,309 5,572 2,233 (4,922 ) 15,192 First Six Months 2019 Net sales $ 262,344 $ 277,263 $ 59,677 $ — $ 599,284 Intersegment sales 15 36,473 — — 36,488 Operating profit (loss) 38,286 13,219 6,014 (13,382 ) 44,137 First Six Months 2018 Net sales $ 248,001 $ 303,869 $ 60,682 $ — $ 612,552 Intersegment sales 31 23,052 — — 23,083 Operating profit (loss) 22,170 11,470 5,608 (10,805 ) 28,443
Disaggregation of Revenue	The following table disaggregates revenue for each segment by end market for the second quarter and first six months of 2019 and 2018, respectively: (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total Second Quarter 2019 End Market Semiconductor $ 1,303 $ 100,758 $ 93 $ — $ 102,154 Industrial 28,585 7,704 3,842 — 40,131 Aerospace and Defense 26,046 1,125 4,750 — 31,921 Consumer Electronics 22,663 500 4,430 — 27,593 Automotive 16,564 1,669 365 — 18,598 Energy 11,303 16,027 — — 27,330 Telecom and Data Center 18,244 713 — — 18,957 Other 10,523 4,742 15,894 — 31,159 Total $ 135,231 $ 133,238 $ 29,374 $ — $ 297,843 Second Quarter 2018 End Market Semiconductor $ 1,299 $ 118,525 $ 428 $ — $ 120,252 Industrial 28,974 7,951 3,171 — 40,096 Aerospace and Defense 25,964 1,010 4,960 — 31,934 Consumer Electronics 16,150 174 5,021 — 21,345 Automotive 23,236 1,804 469 — 25,509 Energy 9,825 12,069 — — 21,894 Telecom and Data Center 17,784 566 — — 18,350 Other 6,533 8,225 14,947 — 29,705 Total $ 129,765 $ 150,324 $ 28,996 $ — $ 309,085 (Thousands) Performance Alloys and Composites Advanced Materials Precision Coatings Other Total First Six Months 2019 End Market Semiconductor $ 3,268 $ 205,125 $ 205 $ — $ 208,598 Industrial 55,015 15,635 7,992 — 78,642 Aerospace and Defense 53,120 2,618 9,622 — 65,360 Consumer Electronics 36,218 705 7,916 — 44,839 Automotive 37,277 3,023 587 — 40,887 Energy 22,397 38,190 — — 60,587 Telecom and Data Center 35,836 914 — — 36,750 Other 19,213 11,053 33,355 — 63,621 Total $ 262,344 $ 277,263 $ 59,677 $ — $ 599,284 First Six Months 2018 End Market Semiconductor $ 2,387 $ 226,842 $ 971 $ — $ 230,200 Industrial 58,577 15,416 5,899 — 79,892 Aerospace and Defense 44,246 2,020 9,644 — 55,910 Consumer Electronics 31,455 626 9,291 — 41,372 Automotive 46,773 4,184 691 — 51,648 Energy 17,612 33,480 — — 51,092 Telecom and Data Center 32,647 1,031 — — 33,678 Other 14,304 20,270 34,186 — 68,760 Total $ 248,001 $ 303,869 $ 60,682 $ — $ 612,552

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 28, 2019
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) June 28, 2019 December 31, 2018 $ change % change Accounts receivable, trade $ 132,493 $ 124,498 $ 7,995 6 % Unbilled receivables 9,430 4,619 4,811 104 % Unearned revenue 5,829 5,918 (89 ) (2 )%

Other-net (Tables)

Other-net (Tables)	6 Months Ended
	Jun. 28, 2019
Other Income and Expenses [Abstract]
Summary of Other-Net Expense	Other-net expense for the second quarter and first six months of of 2019 and 2018 is summarized as follows: Second Quarter Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Metal consignment fees $ 2,225 $ 2,588 $ 5,316 $ 5,017 Amortization of intangible assets 368 561 758 1,334 Foreign currency loss 307 1,230 384 1,219 Net loss (gain) on disposal of fixed assets 118 (3 ) 142 23 Rental income (29 ) (134 ) (58 ) (260 ) Other items (98 ) 71 470 (96 ) Total $ 2,891 $ 4,313 $ 7,012 $ 7,237

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The following table sets forth the computation of basic and diluted EPS: Second Quarter Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands, except per share amounts) 2019 2018 2019 2018 Numerator for basic and diluted EPS: Net income $ 15,540 $ 11,144 $ 32,446 $ 21,708 Denominator: Denominator for basic EPS: Weighted-average shares outstanding 20,383 20,221 20,326 20,178 Effect of dilutive securities: Stock appreciation rights 76 166 92 185 Restricted stock units 76 75 77 85 Performance-based restricted stock units 131 131 140 135 Diluted potential common shares 283 372 309 405 Denominator for diluted EPS: Adjusted weighted-average shares outstanding 20,666 20,593 20,635 20,583 Basic EPS $ 0.76 $ 0.55 $ 1.60 $ 1.08 Diluted EPS $ 0.75 $ 0.54 $ 1.57 $ 1.05

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 28, 2019
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories on the Consolidated Balance Sheets are summarized as follows: June 28, December 31, (Thousands) 2019 2018 Raw materials and supplies $ 38,425 $ 33,182 Work in process 190,428 195,879 Finished goods 32,062 30,643 Subtotal $ 260,915 $ 259,704 Less: LIFO reserve balance 47,586 44,833 Inventories $ 213,329 $ 214,871

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 28, 2019
Leases [Abstract]
Lease, Cost [Table Text Block]	The components of operating and finance lease cost for the second quarter and first six months of 2019 were as follows: Second Quarter Ended Six Months Ended June 28, June 28, (Thousands) 2019 2019 Components of lease expense Operating lease cost $ 2,291 $ 5,003 Finance lease cost Amortization of right-of-use assets 354 710 Interest on lease liabilities 259 522 Total lease cost $ 2,904 $ 6,235
Schedule Of Future Minimum Lease Payments For Capital Leases And Operating Leases [Table Text Block]	Finance Operating (Thousands) Leases Leases 2019 $ 1,122 $ 4,201 2020 2,244 7,618 2021 2,244 6,619 2022 2,244 4,727 2023 1,534 3,818 2024 and thereafter 22,414 5,148 Total lease payments 31,802 32,131 Less amount of lease payment representing interest 12,239 4,086 Total present value of lease payments $ 19,563 $ 28,045
ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock [Table Text Block]	Supplemental cash flow information related to leases for the first six months of 2019 was as follows: Six Months Ended June 28, (Thousands) 2019 Supplemental cash flow information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7,710 Operating cash flows from finance leases 522 Financing cash flows from finance leases 599
ScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesTableTextBlock [Table Text Block]	Supplemental balance sheet information related to the Company's operating and finance leases as of June 28, 2019 was as follows: June 28, (Thousands) 2019 Supplemental balance sheet information Operating Leases Operating lease right-of-use assets $ 26,788 Other liabilities and accrued items 6,927 Operating lease liabilities 21,118 Finance Leases Property, plant, and equipment $ 26,330 Allowances for depreciation, depletion, and amortization (3,140 ) Finance lease assets, net $ 23,190 Other liabilities and accrued items $ 1,238 Finance lease liabilities 18,325 Total principal payable on finance leases $ 19,563

Pensions and Other Post-emplo_2

Pensions and Other Post-employment Benefits (Tables)	6 Months Ended
	Jun. 28, 2019
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Cost	The following is a summary of the net periodic benefit cost for the second quarter of 2019 and 2018 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 Second Quarter Ended Second Quarter Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Components of net periodic benefit cost (benefit) Service cost $ 1,418 $ 1,674 $ 18 $ 28 Interest cost 1,347 2,397 99 99 Expected return on plan assets (2,167 ) (3,697 ) — — Amortization of prior service benefit 122 (30 ) (375 ) (374 ) Amortization of net loss (gain) 627 1,959 (23 ) — Pension curtailment charge 3,296 — — — Net periodic benefit cost (benefit) $ 4,643 $ 2,303 $ (281 ) $ (247 ) Pension Benefits Other Benefits Six Months Ended Six Months Ended June 28, June 29, June 28, June 29, (Thousands) 2019 2018 2019 2018 Components of net periodic benefit cost (benefit) Service cost $ 2,758 $ 3,348 $ 35 $ 56 Interest cost 2,904 4,794 199 198 Expected return on plan assets (4,290 ) (7,394 ) — — Amortization of prior service benefit 242 (61 ) (749 ) (749 ) Amortization of net loss (gain) 1,431 3,919 (46 ) — Pension curtailment charge 3,296 — — — Net periodic benefit cost (benefit) $ 6,341 $ 4,606 $ (561 ) $ (495 )

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 28, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Changes in the components of accumulated other comprehensive income, including the amounts reclassified, for the second quarter of 2019 and 2018 and first six months of 2019 and 2018 are as follows: Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Copper Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at March 29, 2019 $ 1,663 $ (24 ) $ 189 $ 1,828 $ (54,003 ) $ (5,095 ) $ (57,270 ) Other comprehensive income before reclassifications (269 ) (563 ) (580 ) (1,412 ) 14,224 339 13,151 Amounts reclassified from accumulated other comprehensive income (46 ) (1 ) 163 116 3,781 — 3,897 Net current period other comprehensive income (loss) before tax (315 ) (564 ) (417 ) (1,296 ) 18,005 339 17,048 Deferred taxes (72 ) (130 ) (94 ) (296 ) 4,052 — 3,756 Net current period other comprehensive income (loss) after tax (243 ) (434 ) (323 ) (1,000 ) 13,953 339 13,292 Balance at June 28, 2019 $ 1,420 $ (458 ) $ (134 ) $ 828 $ (40,050 ) $ (4,756 ) $ (43,978 ) Balance at March 30, 2018 $ 326 $ (238 ) $ — $ 88 $ (98,314 ) $ (2,995 ) $ (101,221 ) Other comprehensive income (loss) before reclassifications 871 635 — 1,506 — (944 ) 562 Amounts reclassified from accumulated other comprehensive income 42 23 — 65 1,622 — 1,687 Net current period other comprehensive income (loss) before tax 913 658 — 1,571 1,622 (944 ) 2,249 Deferred taxes (343 ) 151 — (192 ) 326 — 134 Net current period other comprehensive income (loss) after tax 1,256 507 — 1,763 1,296 (944 ) 2,115 Balance at June 29, 2018 $ 1,582 $ 269 $ — $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 ) Gains and Losses on Cash Flow Hedges (Thousands) Foreign Currency Precious Metals Copper Total Pension and Post-Employment Benefits Foreign Currency Translation Total Balance at December 31, 2018 $ 1,263 $ 79 $ (441 ) $ 901 $ (54,543 ) $ (4,592 ) $ (58,234 ) Other comprehensive income before reclassifications 248 (636 ) 304 (84 ) 14,224 (164 ) 13,976 Amounts reclassified from accumulated other comprehensive income (44 ) (62 ) 92 (14 ) 4,441 — 4,427 Net current period other comprehensive income (loss) before tax 204 (698 ) 396 (98 ) 18,665 (164 ) 18,403 Deferred taxes 47 (161 ) 89 (25 ) 4,172 — 4,147 Net current period other comprehensive income (loss) after tax 157 (537 ) 307 (73 ) 14,493 (164 ) 14,256 Balance at June 28, 2019 $ 1,420 $ (458 ) $ (134 ) $ 828 $ (40,050 ) $ (4,756 ) $ (43,978 ) Balance at December 31, 2017 $ 959 $ (196 ) $ — $ 763 $ (99,592 ) $ (4,108 ) $ (102,937 ) Other comprehensive income (loss) before reclassifications (327 ) 444 — 117 — 169 286 Amounts reclassified from accumulated other comprehensive income 419 159 — 578 3,248 — 3,826 Net current period other comprehensive income (loss) before tax 92 603 — 695 3,248 169 4,112 Deferred taxes (531 ) 138 — (393 ) 674 — 281 Net current period other comprehensive income (loss) after tax 623 465 — 1,088 2,574 169 3,831 Balance at June 29, 2018 $ 1,582 $ 269 $ — $ 1,851 $ (97,018 ) $ (3,939 ) $ (99,106 )

Stock-based Compensation Expe_2

Stock-based Compensation Expense Tables (Tables)	6 Months Ended
	Jun. 28, 2019
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 2.47 % Dividend yield 0.7 % Volatility 31.7 % Expected term (in years) 5.2

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 28, 2019
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 June 28, 2019 and December 31, 2018 : (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) 2019 2018 2019 2018 2019 2018 2019 2018 Financial Assets Deferred compensation investments $ 3,121 $ 2,156 $ 3,121 $ 2,156 $ — $ — $ — $ — Foreign currency forward contracts 119 246 — — 119 246 — — Precious metal swaps — 237 — — — 237 — — Copper swaps 9 — — — 9 — — — Total $ 3,249 $ 2,639 $ 3,121 $ 2,156 $ 128 $ 483 $ — $ — Financial Liabilities Deferred compensation liability $ 3,121 $ 2,156 $ 3,121 $ 2,156 $ — $ — $ — $ — Foreign currency forward contracts 121 432 — — 121 432 — — Precious metal swaps 596 135 — — 596 135 — — Copper swaps 182 569 — — 182 569 — — Total $ 4,020 $ 3,292 $ 3,121 $ 2,156 $ 899 $ 1,136 $ — $ —

Derivative Instruments and He_2

Derivative Instruments and Hedging Activity Tables (Tables)	6 Months Ended
	Jun. 28, 2019
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 (on a gross basis) and balance sheet classification as of June 28, 2019 and December 31, 2018 : June 28, 2019 December 31, 2018 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Foreign currency forward contracts - euro Prepaid expenses $ 2,421 $ 27 $ 8,767 $ 244 Other liabilities and accrued items 3,836 52 8,771 249
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	following table summarizes the notional amount and the fair value of the Company’s outstanding derivatives designated as cash flow hedges (on a gross basis) and balance sheet classification as of June 28, 2019 and December 31, 2018 : June 28, 2019 December 31, 2018 (Thousands) Notional Amount Fair Value Notional Amount Fair Value Prepaid expenses Foreign currency forward contracts - yen $ 1,465 $ 9 $ — $ — Foreign currency forward contracts - euro 7,475 83 725 2 Precious metal swaps — — 4,533 237 Copper swaps 977 9 — — Total 9,917 101 5,258 239 Other liabilities and accrued items Foreign currency forward contracts - yen 2,065 35 1,264 17 Foreign currency forward contracts - euro 7,459 34 19,158 166 Precious metal swaps 6,828 573 2,864 135 Copper swaps 4,359 182 11,170 569 Total 20,711 824 34,456 887 Other long-term liabilities Precious metal swaps 697 23 — — Total $ 31,325 $ 746 $ 39,714 $ 648
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table summarizes the amounts reclassified from accumulated other comprehensive income relating to the hedging relationship of the Company’s outstanding derivatives designated as cash flow hedges and income statement classification as of the second quarter and first six months of of 2019 : Second Quarter Ended Six Months ended (Thousands) June 28, 2019 June 28, 2019 Hedging relationship Line item Foreign currency forward contracts Net sales (46 ) (44 ) Precious metal swaps Cost of sales (1 ) (62 ) Copper swaps Cost of sales 163 92 Total $ 116 $ (14 )

New Prouncements Adopted (Detai

New Prouncements Adopted (Details) $ in Millions	Jan. 01, 2019USD ($)
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 0.2

Segment Reporting (Detail)

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Segment Reporting Information
Net sales	$ 297,843	$ 309,085	$ 599,284	$ 612,552
Intersegment sales	19,266	11,403	36,488	23,083
Operating profit (loss)	22,750	15,192	44,137	28,443
Performance Alloys and Composites
Segment Reporting Information
Net sales	135,231	129,765	262,344	248,001
Intersegment sales	6	3	15	31
Operating profit (loss)	19,328	12,309	38,286	22,170
Advanced Materials
Segment Reporting Information
Net sales	133,238	150,324	277,263	303,869
Intersegment sales	19,260	11,400	36,473	23,052
Operating profit (loss)	6,139	5,572	13,219	11,470
Precision Coatings
Segment Reporting Information
Net sales	29,374	28,996	59,677	60,682
Intersegment sales	0	0	0	0
Operating profit (loss)	3,937	2,233	6,014	5,608
Other
Segment Reporting Information
Net sales	0	0	0	0
Intersegment sales	0	0	0	0
Operating profit (loss)	$ (6,654)	$ (4,922)	$ (13,382)	$ (10,805)

Segment Reporting (Details 1)

Segment Reporting (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 297,843	$ 309,085	$ 599,284	$ 612,552
Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	102,154	120,252	208,598	230,200
Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	27,593	21,345	44,839	41,372
Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	40,131	40,096	78,642	79,892
Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	31,921	31,934	65,360	55,910
Energy
Disaggregation of Revenue [Line Items]
Net sales	27,330	21,894	60,587	51,092
Telecomm and Data Center
Disaggregation of Revenue [Line Items]
Net sales	18,957	18,350	36,750	33,678
Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	18,598	25,509	40,887	51,648
Other End Market
Disaggregation of Revenue [Line Items]
Net sales	31,159	29,705	63,621	68,760
Performance Alloys and Composites
Disaggregation of Revenue [Line Items]
Net sales	135,231	129,765	262,344	248,001
Performance Alloys and Composites | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	1,303	1,299	3,268	2,387
Performance Alloys and Composites | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	22,663	16,150	36,218	31,455
Performance Alloys and Composites | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	28,585	28,974	55,015	58,577
Performance Alloys and Composites | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	26,046	25,964	53,120	44,246
Performance Alloys and Composites | Energy
Disaggregation of Revenue [Line Items]
Net sales	11,303	9,825	22,397	17,612
Performance Alloys and Composites | Telecomm and Data Center
Disaggregation of Revenue [Line Items]
Net sales	18,244	17,784	35,836	32,647
Performance Alloys and Composites | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	16,564	23,236	37,277	46,773
Performance Alloys and Composites | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	10,523	6,533	19,213	14,304
Advanced Materials
Disaggregation of Revenue [Line Items]
Net sales	133,238	150,324	277,263	303,869
Advanced Materials | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	100,758	118,525	205,125	226,842
Advanced Materials | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	500	174	705	626
Advanced Materials | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	7,704	7,951	15,635	15,416
Advanced Materials | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	1,125	1,010	2,618	2,020
Advanced Materials | Energy
Disaggregation of Revenue [Line Items]
Net sales	16,027	12,069	38,190	33,480
Advanced Materials | Telecomm and Data Center
Disaggregation of Revenue [Line Items]
Net sales	713	566	914	1,031
Advanced Materials | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	1,669	1,804	3,023	4,184
Advanced Materials | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	4,742	8,225	11,053	20,270
Precision Coatings
Disaggregation of Revenue [Line Items]
Net sales	29,374	28,996	59,677	60,682
Precision Coatings | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	93	428	205	971
Precision Coatings | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	4,430	5,021	7,916	9,291
Precision Coatings | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	3,842	3,171	7,992	5,899
Precision Coatings | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	4,750	4,960	9,622	9,644
Precision Coatings | Energy
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Precision Coatings | Telecomm and Data Center
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Precision Coatings | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	365	469	587	691
Precision Coatings | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	15,894	14,947	33,355	34,186
Other
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Industrial Components
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Energy
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Telecomm and Data Center
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Automotive Electronics
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other | Other End Market
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Increase (Decrease) in Unearned Revenue	$ (88)	$ 2,132
Trade Accounts Receivable
Capitalized Contract Cost [Line Items]
Accounts Receivable, Trade	132,493		$ 124,498
Change in Accounts Receivable, Trade	$ 7,995
Contract Asset Percent Change	6.00%
Unbilled Receivables
Capitalized Contract Cost [Line Items]
Unbilled Contracts Receivable	$ 9,430		4,619
Change in Unbilled Receivables	$ 4,811
Contract Asset Percent Change	104.00%
UnearnedRevenue
Capitalized Contract Cost [Line Items]
Deferred Revenue	$ 5,829		$ 5,918
Increase (Decrease) in Unearned Revenue	$ (89)
Contract Liability Percent Change	(2.00%)

Revenue Recognition (Details 1)

Revenue Recognition (Details 1) $ in Millions	6 Months Ended
	Jun. 28, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 5

Revenue Recognition Revenue Rec

Revenue Recognition Revenue Recognition (Details 2) $ in Millions	Jun. 28, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 19.6

Other-net (Detail)

Other-net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Other Income and Expenses [Abstract]
Metal consignment fees	$ 2,225	$ 2,588	$ 5,316	$ 5,017
Amortization of Intangible Assets	368	561	758	1,334
Foreign currency loss (gain)	307	1,230	384	1,219
Net loss (gain) on disposal of fixed assets	118	(3)	142	23
Rental Income	(29)	(134)	(58)	(260)
Other items	(98)	71	470	(96)
Total	$ 2,891	$ 4,313	$ 7,012	$ 7,237

Income Taxes Details (Details)

Income Taxes Details (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	18.80%	20.90%	18.50%	17.00%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount			$ 0.5	$ 1

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Numerator For Basic And Diluted EPS:
Net income	$ 15,540	$ 11,144	$ 32,446	$ 21,708
Denominator for basic EPS:
Weighted-average shares outstanding	20,383	20,221	20,326	20,178
Effect of dilutive securities:
Diluted potential common shares (in shares)	283	372	309	405
Denominator for diluted EPS:
Adjusted weighted-average shares outstanding	20,666	20,593	20,635	20,583
Basic EPS (in usd per share)	$ 0.76	$ 0.55	$ 1.60	$ 1.08
Diluted EPS (in usd per share)	$ 0.75	$ 0.54	$ 1.57	$ 1.05
Stock Appreciation Rights (SARs)
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	76	166	92	185
Restricted Stock Units (RSUs)
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	76	75	77	85
Performance Shares
Effect of dilutive securities:
Dilutive effect of share-based compensation (in shares)	131	131	140	135

Earnings Per Share (Details 1)

Earnings Per Share (Details 1) - shares	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Earnings Per Share [Abstract]
Securities excluded from diluted EPS calculation	84,509	65,112	144,154	65,112

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Principally average cost:
Raw materials and supplies	$ 38,425	$ 33,182
Work in process	190,428	195,879
Finished goods	32,062	30,643
Subtotal	260,915	259,704
Less: LIFO reserve balance	47,586	44,833
Inventories	$ 213,329	$ 214,871

Inventories (Details 1)

Inventories (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Inventory Disclosure [Abstract]
LIFO liquidation effect	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Notional Amount of Nonderivative Instruments			$ 295.7		$ 316.1

Components of Lease Expense (De

Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 28, 2019	Jun. 28, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 2,291	$ 5,003
Finance lease cost
Amortization of right-of-use assets	354	710
Interest on lease liabilities	259	522
Total lease cost	$ 2,904	$ 6,235

Future Estimated Minimum Paymen

Future Estimated Minimum Payments Under Finance Leases and Non-Cancelable Operating Leases (Details) $ in Thousands	Jun. 28, 2019USD ($)
Finance Leases
2019	$ 1,122
2020	2,244
2021	2,244
2022	2,244
2023	1,534
2024 and thereafter	22,414
Total minimum lease payments	31,802
Amounts representing interest	12,239
Present value of net minimum lease payments	19,563
Operating Leases
2019	4,201
2020	7,618
2021	6,619
2022	4,727
2023	3,818
2024 and thereafter	5,148
Total minimum lease payments	32,131
Amount of lease payment representing interest	4,086
Present value of lease payments	$ 28,045

Leases (Details Textual)

Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Leases [Abstract]
Operating Lease Term Maximum	25 years
Operating lease expense	$ 2.3	$ 3	$ 5	$ 6.1
Weighted Average Remaining Lease Term
Operating leases	5 years 1 month 2 days		5 years 1 month 2 days
Finance leases	19 years 10 months 13 days		19 years 10 months 13 days
Weighted Average Discount Rate
Operating leases	5.55%		5.55%
Finance leases	5.31%		5.31%

Supplemental Cash Flow Informat

Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 7,710
Operating cash flows from finance leases	522
Financing cash flows from finance leases	$ 599	$ 425

Supplemental Balance Sheet Info

Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Operating Leases
Operating lease, right-of-use asset	$ 26,788	$ 0
Operating Lease, Liability, Current	6,927
Operating lease liabilities	21,118	0
Finance Leases
Finance lease liabilities	18,325	15,221
Total principal payable on finance lease	19,563
Property, Plant and Equipment	913,325	898,251
Allowance for depreciation, depletion and amortization	(669,861)	(647,233)
Finance lease assets, net	243,464	$ 251,018
Other liabilities and accrued items	1,238
Property, Plant and Equipment [Member]
Property, Plant and Equipment	26,330
Allowance for depreciation, depletion and amortization	(3,140)
Finance lease assets, net	$ 23,190

Pensions and Other Post-emplo_3

Pensions and Other Post-employment Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Components of net periodic benefit cost
Pension curtailment	$ 3,296		$ 3,296	$ 0
Pension Benefits [Member]
Components of net periodic benefit cost
Service cost	1,418	$ 1,674	2,758	3,348
Interest cost	1,347	2,397	2,904	4,794
Expected return on plan assets	(2,167)	(3,697)	(4,290)	(7,394)
Amortization of prior service benefit	122	(30)	242	(61)
Amortization of net loss (gain)	627	1,959	1,431	3,919
Pension curtailment	3,296	0	3,296	0
Total net benefit cost	4,643	2,303	6,341	4,606
Other Benefits [Member]
Components of net periodic benefit cost
Service cost	18	28	35	56
Interest cost	99	99	199	198
Expected return on plan assets	0	0	0	0
Amortization of prior service benefit	(375)	(374)	(749)	(749)
Amortization of net loss (gain)	(23)	0	(46)	0
Pension curtailment	0	0	0	0
Total net benefit cost	$ (281)	$ (247)	$ (561)	$ (495)

Pensions and Other Post-emplo_4

Pensions and Other Post-employment Benefits (Detail 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Pension curtailment	$ 3,296		$ 3,296	$ 0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by Employer			3,000	13,000
Pension curtailment	$ 3,296	$ 0	$ 3,296	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Mar. 29, 2019	Dec. 31, 2018	Mar. 30, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	$ (43,978)	$ (99,106)	$ (43,978)	$ (99,106)	$ (57,270)	$ (58,234)	$ (101,221)	$ (102,937)
Activity
Other comprehensive income (loss) before reclassifications	13,151	562	13,976	286
Amounts reclassified from accumulated other comprehensive income	3,897	1,687	4,427	3,826
Net current period other comprehensive income (loss) before tax	17,048	2,249	18,403	4,112
Deferred taxes on current period activity	3,756	134	4,147	281
Net current period other comprehensive income (loss) after tax	13,292	2,115	14,256	3,831
Pension and Post Employment Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(40,050)	(97,018)	(40,050)	(97,018)	(54,003)	(54,543)	(98,314)	(99,592)
Activity
Other comprehensive income (loss) before reclassifications	14,224	0	14,224	0
Amounts reclassified from accumulated other comprehensive income	3,781	1,622	4,441	3,248
Net current period other comprehensive income (loss) before tax	18,005	1,622	18,665	3,248
Deferred taxes on current period activity	4,052	326	4,172	674
Net current period other comprehensive income (loss) after tax	13,953	1,296	14,493	2,574
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(4,756)	(3,939)	(4,756)	(3,939)	(5,095)	(4,592)	(2,995)	(4,108)
Activity
Other comprehensive income (loss) before reclassifications	339	(944)	(164)	169
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive income (loss) before tax	339	(944)	(164)	169
Deferred taxes on current period activity	0	0	0	0
Net current period other comprehensive income (loss) after tax	339	(944)	(164)	169
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	828	1,851	828	1,851	1,828	901	88	763
Activity
Other comprehensive income (loss) before reclassifications	(1,412)	1,506	(84)	117
Amounts reclassified from accumulated other comprehensive income	116	65	(14)	578
Net current period other comprehensive income (loss) before tax	(1,296)	1,571	(98)	695
Deferred taxes on current period activity	(296)	(192)	(25)	(393)
Net current period other comprehensive income (loss) after tax	(1,000)	1,763	(73)	1,088
Foreign Currency Forward Contract | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	1,420	1,582	1,420	1,582	1,663	1,263	326	959
Activity
Other comprehensive income (loss) before reclassifications	(269)	871	248	(327)
Amounts reclassified from accumulated other comprehensive income	(46)	42	(44)	419
Net current period other comprehensive income (loss) before tax	(315)	913	204	92
Deferred taxes on current period activity	(72)	(343)	47	(531)
Net current period other comprehensive income (loss) after tax	(243)	1,256	157	623
Precious Metal Contracts [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(458)	269	(458)	269	(24)	79	(238)	(196)
Activity
Other comprehensive income (loss) before reclassifications	(563)	635	(636)	444
Amounts reclassified from accumulated other comprehensive income	(1)	23	(62)	159
Net current period other comprehensive income (loss) before tax	(564)	658	(698)	603
Deferred taxes on current period activity	(130)	151	(161)	138
Net current period other comprehensive income (loss) after tax	(434)	507	(537)	465
Copper Swap [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(134)	0	(134)	0	$ 189	$ (441)	$ 0	$ 0
Activity
Other comprehensive income (loss) before reclassifications	(580)	0	304	0
Amounts reclassified from accumulated other comprehensive income	163	0	92	0
Net current period other comprehensive income (loss) before tax	(417)	0	396	0
Deferred taxes on current period activity	(94)	0	89	0
Net current period other comprehensive income (loss) after tax	$ (323)	$ 0	$ 307	$ 0

Stock-based Compensation Expe_3

Stock-based Compensation Expense (Detail)	6 Months Ended
	Jun. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.47%
Dividend yield	0.70%
Volatility	31.70%
Expected term (in years)	5 years 2 months 12 days

Stock-based Compensation Expe_4

Stock-based Compensation Expense Textual (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 3.5	$ 2.7	$ 6.2	$ 5.2
Document Period End Date			Jun. 28, 2019
Unearned Compensation	$ 13.6		$ 13.6
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period			73,461
Weighted average exercise price on SARs granted in period			$ 58.30
Grant date fair value per unit (in usd per share)			17.76
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per unit (in usd per share)			$ 69.84
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			63,665
Grant date fair value per unit (in usd per share)			$ 58.30
Vesting period			3 years
Director Equity Plan [Domain] | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period			11,048
Grant date fair value per unit (in usd per share)			$ 68.79
Vesting period			1 year

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Investment Assets	$ 3,121	$ 2,156
Foreign Currency Forward Contract	119	246
Precious Metal Swaps	0	237
Copper Swaps	9	0
Total Financial Assets	3,249	2,639
Deferred Compensation Investment Related Liability	3,121	2,156
Foreign Currency Forward Contract	121	432
Precious Metal Swaps	596	135
Copper Swaps	182	569
Total Financial Liabilities	4,020	3,292
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Investment Assets	3,121	2,156
Foreign Currency Forward Contract	0	0
Precious Metal Swaps	0	0
Copper Swaps	0	0
Total Financial Assets	3,121	2,156
Deferred Compensation Investment Related Liability	3,121	2,156
Foreign Currency Forward Contract	0	0
Precious Metal Swaps	0	0
Copper Swaps	0	0
Total Financial Liabilities	3,121	2,156
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Investment Assets	0	0
Foreign Currency Forward Contract	119	246
Precious Metal Swaps	0	237
Copper Swaps	9	0
Total Financial Assets	128	483
Deferred Compensation Investment Related Liability	0	0
Foreign Currency Forward Contract	121	432
Precious Metal Swaps	596	135
Copper Swaps	182	569
Total Financial Liabilities	899	1,136
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Investment Assets	0	0
Foreign Currency Forward Contract	0	0
Precious Metal Swaps	0	0
Copper Swaps	0	0
Total Financial Assets	0	0
Deferred Compensation Investment Related Liability	0	0
Foreign Currency Forward Contract	0	0
Precious Metal Swaps	0	0
Copper Swaps	0	0
Total Financial Liabilities	$ 0	$ 0

Derivative Instruments and He_3

Derivative Instruments and Hedging Activity (Details - Not designated as hedges) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 0	$ 1,600	$ 0	$ 1,100
Euro Member Countries, Euro | Not Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member] | Foreign Currency Forward Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Notional Amount	2,421		2,421		$ 8,767
Derivative Asset, Fair Value, Gross Asset	27		27		244
Euro Member Countries, Euro | Not Designated as Hedging Instrument [Member] | Other Current Liabilities | Foreign Currency Forward Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Notional Amount	3,836		3,836		8,771
Derivative Liability, Fair Value, Gross Liability	$ 52		$ 52		$ 249

Derivative Instruments and He_4

Derivative Instruments and Hedging Activity (Details - Designated as hedges) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, Notional Amount	$ 31,325	$ 39,714
Derivative, Fair Value, Net	746	648
Prepaid Expenses and Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	9,917	5,258
Derivative Asset, Fair Value, Gross Asset	101	239
Prepaid Expenses and Other Current Assets [Member] | Precious Metal Swaps [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	0	4,533
Derivative Asset, Fair Value, Gross Asset	0	237
Prepaid Expenses and Other Current Assets [Member] | Copper Swap [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	977	0
Derivative Asset, Fair Value, Gross Asset	9	0
Other Current Liabilities
Derivative [Line Items]
Derivative Liability, Notional Amount	20,711	34,456
Derivative Liability, Fair Value, Gross Liability	824	887
Other Current Liabilities | Precious Metal Swaps [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	6,828	2,864
Derivative Liability, Fair Value, Gross Liability	573	135
Other Current Liabilities | Copper Swap [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	4,359	11,170
Derivative Liability, Fair Value, Gross Liability	182	569
Other Noncurrent Liabilities [Member] | Precious Metal Swaps [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	697	0
Derivative Liability, Fair Value, Gross Liability	23	0
Japan, Yen | Prepaid Expenses and Other Current Assets [Member] | Foreign Currency Forward Contract
Derivative [Line Items]
Derivative Asset, Notional Amount	1,465	0
Derivative Asset, Fair Value, Gross Asset	9	0
Japan, Yen | Other Current Liabilities | Foreign Currency Forward Contract
Derivative [Line Items]
Derivative Liability, Notional Amount	2,065	1,264
Derivative Liability, Fair Value, Gross Liability	35	17
Euro Member Countries, Euro | Prepaid Expenses and Other Current Assets [Member] | Foreign Currency Forward Contract
Derivative [Line Items]
Derivative Asset, Notional Amount	7,475	725
Derivative Asset, Fair Value, Gross Asset	83	2
Euro Member Countries, Euro | Other Current Liabilities | Foreign Currency Forward Contract
Derivative [Line Items]
Derivative Liability, Notional Amount	7,459	19,158
Derivative Liability, Fair Value, Gross Liability	$ 34	$ 166

Derivative Instruments and He_5

Derivative Instruments and Hedging Activity (Details - Reclassificatoins from AOCI) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 28, 2019	Jun. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 116	$ (14)
Sales Revenue, Net [Member] | Euro Member Countries, Euro | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(46)	(44)
Cost of Sales [Member] | Precious Metal Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	(62)
Cost of Sales [Member] | Copper Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 163	$ 92

Contingencies (Detail)

Contingencies (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 28, 2019	Dec. 31, 2018
Loss Contingency [Abstract]
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	$ 6.2	$ 6.5