Littelfuse (LFUS) 10-Q 29 Jul 20 2020 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 27, 2020	Jul. 24, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 27, 2020
Document Transition Report	false
Entity File Number	0-20388
Entity Registrant Name	LITTELFUSE INC /DE
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3795742
Entity Address, Address Line One	8755 West Higgins Road
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60631
City Area Code	773
Local Phone Number	628-1000
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	LFUS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,341,584
Entity Central Index Key	0000889331
Current Fiscal Year End Date	--12-26
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 651,867	$ 531,139
Short-term investments	44	44
Trade receivables, less allowances of $39,970 and $42,043 at June 27, 2020 and December 28, 2019, respectively	185,806	202,309
Inventories	248,020	237,507
Prepaid income taxes and income taxes receivable	1,529	4,831
Prepaid expenses and other current assets	31,899	28,564
Total current assets	1,119,165	1,004,394
Net property, plant, and equipment	334,677	344,617
Intangible assets, net of amortization	301,661	321,247
Goodwill	787,601	820,589
Investments	23,678	24,099
Deferred income taxes	7,555	8,069
Right of use lease assets, net	19,621	21,918
Other assets	17,100	14,965
Total assets	2,611,058	2,559,898
Current liabilities:
Accounts payable	113,767	117,320
Accrued liabilities	85,356	84,120
Accrued income taxes	10,034	14,122
Current portion of long-term debt	0	10,000
Total current liabilities	209,157	225,562
Long-term debt, less current portion	776,205	669,158
Deferred income taxes	46,562	49,763
Accrued post-retirement benefits	39,653	38,198
Non-current operating lease liabilities	15,155	17,166
Other long-term liabilities	61,892	64,037
Shareholders’ equity:
Common stock, par value $0.01 per share: 34,000,000 shares authorized; shares issued, June 27, 2020–25,983,147; December 28, 2019–25,855,203	257	256
Treasury stock, at cost: 1,643,369 and 1,473,901 shares, respectively	(242,192)	(216,447)
Additional paid-in capital	885,306	867,996
Accumulated other comprehensive loss	(124,219)	(106,823)
Retained earnings	943,151	950,901
Littelfuse, Inc. shareholders’ equity	1,462,303	1,495,883
Non-controlling interest	131	131
Total equity	1,462,434	1,496,014
Total liabilities and equity	$ 2,611,058	$ 2,559,898

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Statement of Financial Position [Abstract]
Allowance for trade receivables	$ 39,970	$ 42,043
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	34,000,000	34,000,000
Common stock issued (in shares)	25,983,147	25,855,203
Treasury stock (in shares)	1,643,369	1,473,901

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net sales	$ 307,337	$ 397,879	$ 653,433	$ 803,379
Cost of sales	208,238	256,071	430,622	506,343
Gross profit	99,099	141,808	222,811	297,036
Selling, general, and administrative expenses	53,981	57,666	108,367	120,621
Goodwill impairment charge	33,841	0	33,841	0
Research and development expenses	13,400	21,458	27,995	42,867
Amortization of intangibles	9,827	10,050	19,808	20,241
Total operating expenses	111,049	89,174	190,011	183,729
Operating (loss) income	(11,950)	52,634	32,800	113,307
Interest expense	5,855	5,589	11,273	11,275
Foreign exchange (gain) loss	(6,010)	(3,575)	(3,426)	668
Other (income) expense, net	(1,210)	(2,947)	39	1,358
(Loss) income before income taxes	(10,585)	53,567	24,914	100,006
Income taxes	(1,594)	9,775	9,261	19,225
Net (loss) income	$ (8,991)	$ 43,792	$ 15,653	$ 80,781
(Loss) income per share:
Basic (in dollars per share)	$ (0.37)	$ 1.77	$ 0.64	$ 3.27
Diluted (in dollars per share)	$ (0.37)	$ 1.75	$ 0.64	$ 3.23
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	24,312	24,740	24,353	24,729
Diluted (in shares)	24,312	24,983	24,520	24,998

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (8,991)	$ 43,792	$ 15,653	$ 80,781
Other comprehensive (loss) income:
Pension and postemployment adjustment, net of tax	(10,839)	161	(10,278)	112
Foreign currency translation adjustments	8,422	(5,892)	(7,118)	2,230
Comprehensive (loss) income	$ (11,408)	$ 38,061	$ (1,743)	$ 83,123

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
OPERATING ACTIVITIES
Net (loss) income	$ 15,653	$ 80,781
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	27,728	25,727
Amortization of intangibles	19,808	20,241
Deferred revenue	(289)	0
Impairment charges	36,078	0
Stock-based compensation	10,852	12,250
Loss on investments and other assets	542	2,458
Deferred income taxes	2,512	(632)
Other	(1,222)	2,009
Changes in operating assets and liabilities:
Trade receivables	13,914	(13,242)
Inventories	(10,761)	6,230
Accounts payable	3,439	(17,927)
Accrued liabilities and income taxes	(19,144)	(36,713)
Prepaid expenses and other assets	2,176	(1,090)
Net cash provided by operating activities	101,286	80,092
INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	0	(775)
Purchases of property, plant, and equipment	(29,479)	(25,249)
Net proceeds from sale of property, plant and equipment	89	6,212
Net cash used in investing activities	(29,390)	(19,812)
FINANCING ACTIVITIES
Proceeds of revolving credit facility	240,000	0
Payments of term loan	(145,000)	(7,500)
Net proceeds related to stock-based award activities	3,642	3,011
Purchases of common stock	(22,927)	(49,861)
Debt issuance costs	(1,786)	0
Cash dividends paid	(23,403)	(21,274)
Net cash provided by (used in) financing activities	50,526	(75,624)
Effect of exchange rate changes on cash and cash equivalents	(1,694)	392
Increase (decrease) in cash and cash equivalents	120,728	(14,952)
Cash and cash equivalents at beginning of period	531,139	489,733
Cash and cash equivalents at end of period	651,867	474,781
Supplementary Cash Flow Information
Cash paid during the period for interest	10,799	11,478
Capital expenditures, not yet paid	$ 4,665	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Addl. Paid in Capital	Treasury Stock	Accum. Other Comp. (Loss) Income	Retained Earnings	Non-controlling Interest
Balance at Dec. 29, 2018	$ 1,478,342	$ 254	$ 835,828	$ (116,454)	$ (97,924)	$ 856,507	$ 131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	36,989					36,989
Other comprehensive loss, net of tax	8,073				8,073
Stock-based compensation	3,966		3,966
Withheld shares on restricted share units for withholding taxes	(94)			(94)
Stock options exercised	2,292		2,292
Repurchases of common stock	(13,555)			(13,555)
Cash dividends paid	(10,625)					(10,625)
Balance at Mar. 30, 2019	1,505,388	254	842,086	(130,103)	(89,851)	882,871	131
Balance at Dec. 29, 2018	1,478,342	254	835,828	(116,454)	(97,924)	856,507	131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	80,781
Other comprehensive loss, net of tax	2,342
Balance at Jun. 29, 2019	1,509,942	255	855,192	(166,068)	(95,582)	916,014	131
Balance at Mar. 30, 2019	1,505,388	254	842,086	(130,103)	(89,851)	882,871	131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	43,792					43,792
Other comprehensive loss, net of tax	(5,731)				(5,731)
Stock-based compensation	8,284		8,284
Withheld shares on restricted share units for withholding taxes	(4,010)			(4,010)
Stock options exercised	4,823	1	4,822
Repurchases of common stock	(31,955)			(31,955)
Cash dividends paid	(10,649)					(10,649)
Balance at Jun. 29, 2019	1,509,942	255	855,192	(166,068)	(95,582)	916,014	131
Balance at Dec. 28, 2019	1,496,014	256	867,996	(216,447)	(106,823)	950,901	131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	24,644					24,644
Other comprehensive loss, net of tax	(14,979)				(14,979)
Stock-based compensation	2,965		2,965
Withheld shares on restricted share units for withholding taxes	(443)			(443)
Stock options exercised	3,399		3,399
Repurchases of common stock	(22,927)			(22,927)
Cash dividends paid	(11,725)					(11,725)
Balance at Mar. 28, 2020	1,476,948	256	874,360	(239,817)	(121,802)	963,820	131
Balance at Dec. 28, 2019	1,496,014	256	867,996	(216,447)	(106,823)	950,901	131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	15,653
Other comprehensive loss, net of tax	(17,396)
Balance at Jun. 27, 2020	1,462,434	257	885,306	(242,192)	(124,219)	943,151	131
Balance at Mar. 28, 2020	1,476,948	256	874,360	(239,817)	(121,802)	963,820	131
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(8,991)					(8,991)
Other comprehensive loss, net of tax	(2,417)				(2,417)
Stock-based compensation	7,887		7,887
Withheld shares on restricted share units for withholding taxes	(2,375)			(2,375)
Stock options exercised	3,060	1	3,059
Cash dividends paid	(11,678)					(11,678)
Balance at Jun. 27, 2020	$ 1,462,434	$ 257	$ 885,306	$ (242,192)	$ (124,219)	$ 943,151	$ 131

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends paid, per share (in dollars per share)	$ 0.48	$ 0.48	$ 0.43

Summary of Significant Accounti

Summary of Significant Accounting Policies and Other Information	6 Months Ended
	Jun. 27, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Other Information	Summary of Significant Accounting Policies and Other Information Nature of Operations Littelfuse, Inc. and subsidiaries (the “Company”) is a global manufacturer of leading technologies in circuit protection, power control and sensing. Serving over 100,000 end customers, the Company’s products are found in automotive and commercial vehicles, industrial applications, data and telecommunications, medical devices, consumer electronics and appliances. With its broad product portfolio of fuses, semiconductors, polymers, ceramics, relays and sensors, and extensive global infrastructure, the Company’s worldwide associates partner with its customers to design, manufacture and deliver innovative, high-quality solutions for a safer, greener and increasingly connected world. Basis of Presentation The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net (loss) income and comprehensive (loss) income, statements of cash flows, and statement of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 28, 2019 which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results. Revenue Recognition Revenue Disaggregation The following tables disaggregate the Company’s revenue by primary business units for the three and six months ended June 27, 2020 and June 29, 2019: Three Months Ended June 27, 2020 Six Months Ended June 27, 2020 (in thousands) Electronics Automotive Industrial Electronics Automotive Industrial Electronics – Passive Products and Sensors $ 92,846 $ — $ — $ 92,846 $ 177,444 $ — $ — $ 177,444 Electronics – Semiconductor 130,425 — — 130,425 260,016 — — 260,016 Passenger Car Products — 30,309 — 30,309 — 82,954 — 82,954 Automotive Sensors — 13,899 — 13,899 — 38,073 — 38,073 Commercial Vehicle Products — 17,791 — 17,791 — 45,742 — 45,742 Industrial Products — — 22,067 22,067 — — 49,204 49,204 Total $ 223,271 $ 61,999 $ 22,067 $ 307,337 $ 437,460 $ 166,769 $ 49,204 $ 653,433 Three Months Ended June 29, 2019 Six Months Ended June 29, 2019 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Electronics – Passive Products and Sensors $ 108,481 $ — $ — $ 108,481 $ 216,858 $ — $ — $ 216,858 Electronics – Semiconductor 151,072 — — 151,072 308,089 — — 308,089 Passenger Car Products — 53,916 — 53,916 — 110,459 — 110,459 Automotive Sensors — 24,682 — 24,682 — 50,739 — 50,739 Commercial Vehicle Products — 30,052 — 30,052 — 60,935 — 60,935 Industrial Products — — 29,676 29,676 — — 56,299 56,299 Total $ 259,553 $ 108,650 $ 29,676 $ 397,879 $ 524,947 $ 222,133 $ 56,299 $ 803,379 See Note 14, Segment Information for net sales by segment and countries. Revenue Recognition The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowance, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors. The Company elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year. Revenue and Billing The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue. Ship and Debit Program Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributor to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historic activity, electronic distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue. Return to Stock The Company has a return to stock policy whereby certain customers, with prior authorization from Littelfuse management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historic activity. Sales revenue and cost of sales are reduced to anticipate estimated returns. Volume Rebates The Company offers volume based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold. Recently Adopted Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments." The standard modifies the measurement approach for credit losses on financial instruments, including trade receivables, from an incurred loss method to a current expected credit loss method ("CECL"). The standard requires the measurement of expected credit losses to be based on relevant information, including historical experiences, current conditions and a forecast that is supportable. The Company adopted the new standard on December 29, 2019. The adoption of the standard did not have a material effect on our Condensed Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-13 "Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirement for Fair Value Measurement." ASU 2018-13 modifies the disclosure requirements in Topic 820: "Fair Value Measurement," based on the FASB Concepts Statement, "Conceptual Framework for Financial Reporting - Chapter 8: Notes to Financial Statements," including consideration of costs and benefits. The new standard removes certain disclosures, modifies other disclosures and adds additional disclosures related to fair value measurement. The Company adopted the new standard on December 29, 2019. The adoption of ASU 2018- 13 did not have a material impact on our Condensed Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic: 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)." ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The Company adopted the new standard on December 29, 2019. The adoption of ASU 2018-15 did not have a material impact on our Condensed Consolidated Financial Statements. In March 2020, the FASB issued ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This ASU provides optional expedient and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The objective of this is to provide optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting due to the cessation of the London Interbank Offered Rate (LIBOR). The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company does not expect a material effect from the adoption of this guidance on its Condensed Consolidated Financial Statements.

Inventories

Inventories	6 Months Ended
	Jun. 27, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories The components of inventories at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Raw materials $ 82,133 $ 76,732 Work in process 92,681 84,561 Finished goods 106,904 110,388 Inventory Reserves (33,698) (34,174) Total $ 248,020 $ 237,507

Property, Plant, and Equipment

Property, Plant, and Equipment	6 Months Ended
	Jun. 27, 2020
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, Plant, and Equipment The components of net property, plant, and equipment at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Land $ 23,095 $ 24,758 Building 118,409 108,501 Equipment 635,661 631,273 Accumulated depreciation and amortization (442,488) (419,915) Total $ 334,677 $ 344,617 The Company recorded depreciation expense of $13.9 million and $12.6 million for the three months ended June 27, 2020 and June 29, 2019, respectively, and $27.7 million and $25.7 million for six months ended June 27, 2020 and June 29, 2019, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 27, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The amounts for goodwill and changes in the carrying value by segment for the six months ended June 27, 2020 are as follows: (in thousands) Electronics Automotive Industrial Total As of December 28, 2019 $ 650,796 $ 131,321 $ 38,472 $ 820,589 Impairments — (33,841) — (33,841) Currency translation 860 128 (135) 853 As of June 27, 2020 $ 651,656 $ 97,608 $ 38,337 $ 787,601 The Company tests its goodwill annually for impairment on the first day of its fiscal fourth quarter, or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. For the three months ended June 27, 2020, the Company recorded a non-cash charge of $33.8 million to recognize the impairment of goodwill in the automotive sensors reporting unit within the Automotive segment. The goodwill impairment charge was due to reductions in the estimated fair value for the automotive sensors reporting unit based on lower expectations for future revenue, profitability and cash flows as compared to the expectations of the 2019 annual goodwill impairment test. These lower future expectations were driven by projected extended declines in end market demand due to the COVID-19 pandemic. In addition, during the second quarter of 2020, certain customers notified the Company of their decision to delay future programs along with a customer canceling their existing program. The goodwill impairment charge was determined using Level 3 inputs, including discounted cash flow analysis and comparable marketplace fair value data. As of June 27, 2020, the automotive sensors reporting unit had $9.1 million of remaining goodwill. The components of other intangible assets as of June 27, 2020 and December 28, 2019 are as follows: As of June 27, 2020 (in thousands) Gross Accumulated Amortization Net Book Value Land use rights $ 9,584 $ 1,800 $ 7,784 Patents, licenses and software 131,055 $ 83,989 $ 47,066 Distribution network 43,272 37,302 5,970 Customer relationships, trademarks, and tradenames 360,769 119,928 240,841 Total $ 544,680 $ 243,019 $ 301,661 As of December 28, 2019 (in thousands) Gross Accumulated Amortization Net Book Value Land use rights $ 9,649 $ 1,730 $ 7,919 Patents, licenses and software 131,164 78,828 52,336 Distribution network 43,239 36,163 7,076 Customer relationships, trademarks, and tradenames 360,534 106,618 253,916 Total $ 544,586 $ 223,339 $ 321,247 During the three months ended June 27, 2020 and June 29, 2019, the Company recorded amortization expense of $9.8 million and $10.0 million, respectively. During six months ended June 27, 2020, the Company recorded amortization expense of $19.8 million and $20.2 million, respectively. During the six months ended June 27, 2020, the Company recognized a $0.3 million non-cash impairment charge on a certain patent triggered by the Company’s announcement to consolidate a manufacturing facility within the Industrial segment. Estimated annual amortization expense related to intangible assets with definite lives as of June 27, 2020 is as follows: (in thousands) Amount 2020 $ 39,200 2021 37,811 2022 36,846 2023 32,135 2024 29,356 2025 and thereafter 145,511 Total $ 320,859

Accrued Liabilities

Accrued Liabilities	6 Months Ended
	Jun. 27, 2020
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities The components of accrued liabilities as of June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Employee-related liabilities $ 40,785 $ 40,774 Operating lease liability 6,846 7,259 Interest 4,781 5,058 Professional services 3,130 3,986 Restructuring liability 4,463 2,679 Other non-income taxes 2,075 1,940 Other 23,276 22,424 Total $ 85,356 $ 84,120 Employee-related liabilities consist primarily of payroll, sales commissions, bonus, employee benefit accruals and workers’ compensation. Bonus accruals include amounts earned pursuant to the Company’s primary employee incentive compensation plans. Other accrued liabilities include miscellaneous operating accruals and other client-related liabilities.

Restructuring, Impairment and O

Restructuring, Impairment and Other Charges	6 Months Ended
	Jun. 27, 2020
Restructuring and Related Activities [Abstract]
Restructuring, Impairment and Other Charges	Restructuring, Impairment and Other Charges The Company recorded restructuring, impairment and other charges for the three and six months ended June 27, 2020 and June 29, 2019 as follows: Three months ended June 27, 2020 Six months ended June 27, 2020 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Employee terminations $ 856 $ 209 $ 750 $ 1,815 $ 1,737 $ 608 $ 1,071 $ 3,416 Other restructuring charges (1) (12) 22 9 — 108 25 133 Total restructuring charges 855 197 772 1,824 1,737 716 1,096 3,549 Impairment — 33,841 — 33,841 — 33,841 2,237 36,078 Total $ 855 $ 34,038 $ 772 $ 35,665 $ 1,737 $ 34,557 $ 3,333 $ 39,627 Three months ended June 29, 2019 Six months ended June 29, 2019 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Employee terminations $ 1,698 $ 3,241 $ 674 $ 5,613 $ 3,498 $ 3,846 $ 721 $ 8,065 Other restructuring charges — 70 — 70 13 90 250 353 Total restructuring charges 1,698 3,311 674 5,683 3,511 3,936 971 8,418 Impairment — — — — — — — — Total $ 1,698 $ 3,311 $ 674 $ 5,683 $ 3,511 $ 3,936 $ 971 $ 8,418 2020 For the three and six months ended June 27, 2020, the Company recorded total restructuring charges of $1.8 million and $3.5 million, for employee termination costs and other restructuring charges. These charges primarily related to the reorganization of certain manufacturing, selling and administrative functions across all segments and the previously announced consolidation of a manufacturing facility within the Industrial segment. The Company also recognized $33.8 million and $36.1 million of impairment charges for the three and six months ended June 27, 2020, respectively, which included a $33.8 million goodwill impairment charge associated with the automotive sensors reporting unit within the Automotive segment in the second quarter of 2020 and $2.2 million related to the land and building associated with the Company’s previously announced consolidation of a manufacturing facility within the Industrial segment in the first quarter of 2020. The impairment charges of the land and building were included in selling, general and administrative expenses. See Note 4, Goodwill and Other Intangible Assets for further discussion regarding the goodwill impairment charge. 2019 For the three and six months ended June 29, 2019, the Company recorded total restructuring charges of 5.7 million, and 8.4 million, respectively, for employee termination costs and other restructuring charges. These charges primarily related to reorganization of operations and selling, general and administrative functions as well as integration of IXYS within the Electronics segment and the reorganization of operations in the commercial vehicle products and automotive sensors businesses within the Automotive segment. The restructuring reserves as of June 27, 2020 and December 28, 2019 are $4.5 million and $2.7 million, respectively. The restructuring reserves are included within accrued liabilities in the Condensed Consolidated Balance Sheets. The Company anticipates the remaining payments associated with employee terminations will primarily be completed by March 2021.

Debt

Debt	6 Months Ended
	Jun. 27, 2020
Debt Disclosure [Abstract]
Debt	Debt The carrying amounts of debt at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, December 28, Revolving Credit Facility $ 240,000 $ — Term Loan — 145,000 Euro Senior Notes, Series A due 2023 131,378 129,808 Euro Senior Notes, Series B due 2028 106,675 105,400 U.S. Senior Notes, Series A due 2022 25,000 25,000 U.S. Senior Notes, Series B due 2027 100,000 100,000 U.S. Senior Notes, Series A due 2025 50,000 50,000 U.S. Senior Notes, Series B due 2030 125,000 125,000 Other 2,619 2,619 Unamortized debt issuance costs (4,467) (3,669) Total debt 776,205 679,158 Less: Current maturities — (10,000) Total long-term debt $ 776,205 $ 669,158 Revolving Credit Facility / Term Loan On March 4, 2016, the Company entered into a five On October 13, 2017, the Company amended the Credit Agreement to increase the Revolving Credit Facility from $575.0 million to $700.0 million and increase the Term Loan from $125.0 million to $200.0 million and to extend the expiration date from March 4, 2021 to October 13, 2022. The Credit Agreement also included the option for the Company to increase the size of the Revolving Credit Facility and the Term Loan by up to an additional $300.0 million, in the aggregate, subject to the satisfaction of certain conditions set forth in the Credit Agreement. Term Loans could be made in up to two advances. The first advance of $125.0 million occurred on October 13, 2017 and the second advance of $75.0 million occurred on January 16, 2018. For the Term Loan, the Company was required to make quarterly principal payments of 1.25% of the original term loan ($2.5 million quarterly) through maturity, with the remaining balance due on October 13, 2022. The Company paid $2.5 million and $5.0 million of principal payments on the term loan during the three and six months ended June 27, 2020, respectively. On March 25, 2020, the company borrowed $100.0 million from the revolving credit facility to preserve financial flexibility and enhance liquidity, given the increasing levels of uncertainty related to coronavirus disease 2019 ("COVID-19"). On April 3, 2020, the Company amended the Credit Agreement to effect certain changes, including, among others: (i) eliminating the $200.0 million unsecured term loan credit facility, the remaining outstanding balance ($140.0 million) of which was repaid in full on April 3, 2020 through the revolving credit facility; (ii) making certain financial and non-financial covenants less restrictive on the Company; (iii) modifying performance-based interest rate margins and undrawn fees; and (iv) extending the maturity date to April 3, 2025. The amended Credit Agreement also allows the Company to increase the size of the revolving credit facility or enter into one or more tranches of term loans if there is no event of default and the Company is in compliance with certain financial covenants. Outstanding borrowings under the amended Credit Agreement bears interest, at the Company’s option, at either LIBOR, fixed for interest periods of one, two, three or six-month periods, plus 1.25% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.25% to 1.00%, based upon the Company’s Consolidated Leverage Ratio, as defined. The Company was also required to pay commitment fees on unused portions of the credit agreement ranging from 0.125% to 0.20%, based on the Consolidated Leverage Ratio, as defined in the agreement. The amended Credit Agreement included representations, covenants and events of default that are customary for financing transactions of this nature. The effective interest rate on outstanding borrowings under the credit facility was 1.70% at June 27, 2020. As of June 27, 2020, the Company had no amount outstanding in letters of credit and had available $148.6 million of borrowing capacity under the Revolving Credit Facility based on financial covenants. At June 27, 2020, the Company was in compliance with all covenants under the Credit Agreement. Senior Notes On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold €212 million aggregate principal amount of senior notes in two series. The funding date for the Euro denominated senior notes occurred on December 8, 2016 for €117 million in aggregate amount of 1.14% Senior Notes, Series A, due December 8, 2023 (“Euro Senior Notes, Series A due 2023”), and €95 million in aggregate amount of 1.83% Senior Notes, Series B due December 8, 2028 (“Euro Senior Notes, Series B due 2028”) (together, the “Euro Senior Notes”). Interest on the Euro Senior Notes is payable semiannually on June 8 and December 8, commencing June 8, 2017. On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold $125 million aggregate principal amount of senior notes in two series. On February 15, 2017, $25 million in aggregate principal amount of 3.03% Senior Notes, Series A, due February 15, 2022 (“U.S. Senior Notes, Series A due 2022”), and $100 million in aggregate principal amount of 3.74% Senior Notes, Series B, due February 15, 2027 (“U.S. Senior Notes, Series B due 2027”) (together, the “U.S. Senior Notes due 2022 and 2027”) were funded. Interest on the U.S. Senior Notes due 2022 and 2027 is payable semiannually on February 15 and August 15, commencing August 15, 2017. On November 15, 2017, the Company entered into a Note Purchase Agreement pursuant to which the Company issued and sold $175 million in aggregate principal amount of senior notes in two series. On January 16, 2018, $50 million aggregate principal amount of 3.48% Senior Notes, Series A, due February 15, 2025 (“U.S. Senior Notes, Series A due 2025”) and $125 million in aggregate principal amount of 3.78% Senior Notes, Series B, due February 15, 2030 (“U.S. Senior Notes, Series B due 2030”) (together the “U.S. Senior Notes due 2025 and 2030” and with the Euro Senior Notes and the U.S. Senior Notes due 2022 and 2027, the “Senior Notes”) were funded. Interest on the U.S. Senior Notes due 2025 and 2030 is payable semiannually on February 15 and August 15, commencing on August 15, 2018. The Senior Notes have not been registered under the Securities Act, or applicable state securities laws. The Senior Notes are general unsecured senior obligations and rank equal in right of payment with all existing and future unsecured unsubordinated indebtedness of the Company. The Senior Notes are subject to certain customary covenants, including limitations on the Company’s ability, with certain exceptions, to engage in mergers, consolidations, asset sales and transactions with affiliates, to engage in any business that would substantially change the general business of the Company, and to incur liens. In addition, the Company is required to satisfy certain financial covenants and tests relating to, among other matters, interest coverage and leverage. At June 27, 2020, the Company was in compliance with all covenants under the Senior Notes. The Company may redeem the Senior Notes upon the satisfaction of certain conditions and the payment of a make-whole amount to noteholders and are required to offer to repurchase the Senior Notes at par following certain events, including a change of control.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	6 Months Ended
	Jun. 27, 2020
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities For assets and liabilities measured at fair value on a recurring and nonrecurring basis, a three-level hierarchy of measurements based upon observable and unobservable inputs is used to arrive at fair value. Observable inputs are developed based on market data obtained from independent sources, while unobservable inputs reflect the Company’s assumptions about valuation based on the best information available in the circumstances. Depending on the inputs, the Company classifies each fair value measurement as follows: Level 1 —Valuations based on unadjusted quoted prices for identical assets or liabilities in active markets; Level 2 —Valuations based upon quoted prices for similar instruments, prices for identical or similar instruments in markets that are not active, or model-derived valuations, all of whose significant inputs are observable, and Level 3 —Valuations based upon one or more significant unobservable inputs. Following is a description of the valuation methodologies used for instruments measured at fair value and their classification in the valuation hierarchy. Cash Equivalents Cash equivalents primarily consist of money market funds, which are held with an institution with sound credit rating and are highly liquid. The Company classified cash equivalents as Level 1 and are valued at cost which approximates fair value. Investments in Equity Securities Investments in equity securities listed on a national market or exchange are valued at the last sales price and classified within Level 1 of the valuation hierarchy and recorded in investments and other assets. The Company has certain convertible debt and convertible preferred stock investments that are accounted for under the cost method reflected in other assets in the Condensed Consolidated Balance Sheets. During the six months ended June 29, 2019, the Company recorded impairment charges of $2.8 million in Other expense (income), net in the Condensed Consolidated Statements of Net (Loss) Income to adjust these certain investments to their estimated fair value. As of June 27, 2020 and December 28, 2019, the balances of these investments were $0.4 million. The fair value of these investments are measured on a nonrecurring basis using Level 3 inputs under the fair value hierarchy. The Company's accounting and finance management determines the valuation policies and procedures for Level 3 fair value measurements and is responsible for the development and determination of unobservable inputs. Mutual Funds The Company has a non-qualified Supplemental Retirement and Savings Plan which provides additional retirement benefits for certain management employees and named executive officers by allowing participants to defer a portion of their annual compensation. The Company maintains accounts for participants through which participants make investment elections. The marketable securities are classified as Level 1 under the fair value hierarchy as they are maintained in mutual funds with readily determinable fair value and recorded in other assets. There were no changes during the quarter ended June 27, 2020 to the Company’s valuation techniques used to measure asset and liability fair values on a recurring basis. On October 30, 2019, the Company entered a foreign currency exchange forward contract to mitigate the currency fluctuation risk between the Chinese renminbi and U.S. dollar. The foreign currency contract was not designated as a hedge instrument and was marked to market on a monthly basis. The notional value of the forward contracts at December 28, 2019 was $16.0 million and expired on May 5, 2020. On March 23, 2020, the Company unwound the foreign currency exchange forward contract entered on October 30, 2019 and recognized a gain of $0.2 million within Other expenses, net during the six months ended June 27, 2020 . The fair value of the foreign currency forward contract was valued using market exchange rates and classified as a Level 2 input under the fair value hierarchy. As of June 27, 2020 and December 28, 2019, the Company did not hold any non-financial assets or liabilities that are required to be measured at fair value on a recurring basis. The following table presents assets measured at fair value by classification within the fair value hierarchy as of June 27, 2020: Fair Value Measurements Using (in thousands) Quoted Prices in Significant Significant Total Cash Equivalents $ 148,409 $ — $ — $ 148,409 Investments in equity securities 12,899 — — 12,899 Mutual funds 10,650 — — 10,650 The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 28, 2019: Fair Value Measurements Using (in thousands) Quoted Prices in Significant Significant Total Cash Equivalents $ 118,999 $ — $ — $ 118,999 Investments in equity securities 12,969 — — 12,969 Mutual funds 10,464 — — 10,464 In addition to the methods and assumptions used for the financial instruments recorded at fair value as discussed above, the following methods and assumptions are used to estimate the fair value of other financial instruments that are not marked to market on a recurring basis. The Company’s other financial instruments include cash and cash equivalents, short-term investments, accounts receivable and its long-term debt. Due to their short-term maturity, the carrying amounts of cash and cash equivalents, short-term investments and accounts receivable approximate their fair values. The Company’s revolving and term loan debt facilities’ fair values approximate book value at June 27, 2020 and December 28, 2019, as the rates on these borrowings are variable in nature. The carrying value and estimated fair values of the Company’s Euro Senior Notes, Series A and Series B and USD Senior Notes, Series A and Series B, as of June 27, 2020 and December 28, 2019 were as follows: June 27, 2020 December 28, 2019 (in thousands) Carrying Estimated Carrying Estimated Euro Senior Notes, Series A due 2023 $ 131,378 $ 128,003 $ 129,808 $ 131,710 Euro Senior Notes, Series B due 2028 106,675 104,332 105,400 110,336 USD Senior Notes, Series A due 2022 25,000 25,150 25,000 25,054 USD Senior Notes, Series B due 2027 100,000 103,482 100,000 102,548 USD Senior Notes, Series A due 2025 50,000 51,355 50,000 50,775 USD Senior Notes, Series B due 2030 125,000 128,954 125,000 127,701 The Company recognized impairment charges of $1.9 million for the land and building and $0.3 million for a certain patent as a result of the Company’s announcement to consolidate a manufacturing facility within the Industrial segment during the first quarter of 2020. See Note 6, Restructuring, Impairment and Other Charges, for further discussion. The fair value of the land and building was valued using a real estate appraisal and classified as a Level 3 input under the fair value hierarchy. The fair value as of the measurement date, net book value as of June 27, 2020 and related the goodwill impairment charge for assets measured at fair value on nonrecurring basis subsequent to initial recognition during three months ended June 27, 2020 were as follows: Three Months Ended June 27, 2020 June 27, 2020 (in thousands) Impairment Charge Estimated Fair Value Measurement (Level 3) Carrying Value Goodwill $ 33,841 $ 8,953 $ 9,142

Benefit Plans

Benefit Plans	6 Months Ended
	Jun. 27, 2020
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans The Company has company-sponsored defined benefit pension plans covering employees in the U.K., Germany, the Philippines, China, Japan, Mexico, Italy and France. The amount of the retirement benefits provided under the plans is based on years of service and final average pay. The Company recognizes interest cost, expected return on plan assets, and amortization of prior service, net within Other expense (income), net in the Condensed Consolidated Statements of Net (Loss) Income. The components of net periodic benefit cost for the three and six months ended June 27, 2020 and June 29, 2019 were as follows: For the Three Months Ended For the Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Components of net periodic benefit cost: Service cost $ 592 $ 514 $ 1,210 $ 1,014 Interest cost 486 813 1,144 1,597 Expected return on plan assets (402) (821) (1,129) (1,611) Amortization of prior service and net actuarial loss 264 62 409 124 Net periodic benefit cost $ 940 $ 568 $ 1,634 $ 1,124 The Company expects to make approximately $2.3 million of cash contributions to its pension plans in 2020. The Company also sponsors certain post-employment plans in foreign countries and other statutory benefit plans. The Company recorded $0.5 million and $0.2 million expense for the three months ended June 27, 2020 and June 29, 2019 , respectively, and $1.0 million and $0.4 million expense for the six months ended June 27, 2020 and June 29, 2019, respectively, in Cost of Sales and Other expense (income), net within the Condensed Consolidated Statements of Net (Loss) Income. For three and six months ended June 27, 2020, the pre-tax amounts recognized in other comprehensive (loss) income as components of net periodic benefit costs for these plans were $0.2 million and $0.4 million. On April 7, 2020, the Company entered into a definitive agreement to purchase a group annuity contract, under which an insurance company will be required to pay and administer pension payments to certain of the Company’s U.K. pension plan participants, or their designated beneficiaries, who have been receiving pension payments. The purchase of this group annuity contract will reduce the Company’s outstanding pension benefit obligation by approximately $36 million, representing approximately 30% of the total obligations of the Company’s qualified pension plans, and will be funded with pension plan assets and additional cash on hand. In connection with this transaction, the Company will record a one-time non-cash settlement charge in the second half of 2021 currently estimated between $18 million and $22 million, reflecting the accelerated recognition of unamortized actuarial losses in the plan. The actual settlement charge could differ from this estimate due to final data and plan wind-up expenses. Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million (£10.9 million) to both the net pension liability and unamortized actuarial loss within other comprehensive (loss) income during the second quarter. Additionally, the Company made a cash contribution of $10.4 million (£8.4 million) under this agreement during the second quarter.

Other Comprehensive (Loss) Inco

Other Comprehensive (Loss) Income	6 Months Ended
	Jun. 27, 2020
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive (Loss) Income Changes in other comprehensive (loss) income by component were as follows: (in thousands) Three Months Ended Three Months Ended Pre-tax Tax Net of Tax Pre-tax Tax Net of Tax Defined benefit pension plan adjustments $ (13,098) $ (2,259) $ (10,839) $ 201 $ 40 $ 161 Foreign currency translation adjustments 8,422 — 8,422 (5,892) — (5,892) Total change in other comprehensive income (loss) $ (4,676) $ (2,259) $ (2,417) $ (5,691) $ 40 $ (5,731) Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million to unamortized actuarial loss within other comprehensive (loss) income. See Note 9, Benefits Plans for further discussion. (in thousands) Six Months Ended June 27, 2020 Six Months Ended June 29, 2019 Pre-tax Tax Net of Tax Pre-tax Tax Net of Tax Defined benefit pension plan adjustments $ (12,543) $ (2,265) $ (10,278) $ 123 $ 11 $ 112 Foreign currency translation adjustments (7,118) — (7,118) 2,230 — 2,230 Total change in other comprehensive income (loss) $ (19,661) $ (2,265) $ (17,396) $ 2,353 $ 11 $ 2,342 The following tables set forth the changes in accumulated other comprehensive (loss) income by component for the six months ended June 27, 2020 and June 29, 2019: (in thousands) Pension and Foreign Accumulated Balance at December 28, 2019 $ (18,046) $ (88,777) $ (106,823) Activity in the period (10,278) (7,118) (17,396) Balance at June 27, 2020 $ (28,324) $ (95,895) $ (124,219) (in thousands) Pension and Foreign Accumulated Balance at December 29, 2018 $ (9,959) $ (87,965) $ (97,924) Activity in the period 112 2,230 2,342 Balance at June 29, 2019 $ (9,847) $ (85,735) $ (95,582) Amounts reclassified from accumulated other comprehensive (loss) income to earnings for the three and six months ended June 27, 2020 and June 29, 2019 were as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Pension and Postemployment plans: Amortization of prior service and net actuarial loss $ 429 $ 62 $ 774 $ 124 The Company recognizes the amortization of prior service costs in Other (expense) income, net within the Condensed Consolidated Statements of Net (Loss) Income.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 27, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate for the three and six months ended June 27, 2020 was 15.1% and 37.2% respectively, compared to the effective tax rate for the three and six months ended June 29, 2019 of 18.2% and 19.2%.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 27, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Six Months Ended (in thousands, except per share amounts) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Numerator: Net (loss) income as reported $ (8,991) $ 43,792 $ 15,653 $ 80,781 Denominator: Weighted average shares outstanding Basic 24,312 24,740 24,353 24,729 Effect of dilutive securities — 243 167 269 Diluted 24,312 24,983 24,520 24,998 (Loss) Earnings Per Share: Basic (loss) earnings per share $ (0.37) $ 1.77 $ 0.64 $ 3.27 Diluted (loss) earnings per share $ (0.37) $ 1.75 $ 0.64 $ 3.23 Potential shares of common stock relating to stock options excluded from the earnings per share calculation because their effect would be anti-dilutive were 328,624 and 167,599 for the three months ended June 27, 2020 and June 29, 2019, respectively, and 212,290 and 121,326 for the six months ended June 27, 2020 and June 29, 2019, respectively. Share Repurchase Program The Company’s Board of Directors authorized the repurchase of up to 1,000,000 shares of the Company’s common stock under a program for the period May 1, 2018 to April 30, 2019 ("2018 program"). On April 26, 2019, the Company's Board of Directors authorized to a program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2019 to April 30, 2020 ("2019 program") to replace its previous expired 2018 program. On April 23, 2020, the Company's Board of Directors authorized a new program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2020 to April 30, 2021 (the "2020 program") to replace its previous expired 2019 program. The Company has suspended share repurchases for the near-term due to the uncertainty of the impact and duration of COVID-19 and to focus on other capital allocation priorities.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 27, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions As a result of the Company’s acquisition of IXYS, the Company has equity ownership in various investments that are accounted for under the equity method. The following is a description of the investments and related party transactions. Powersem GmbH: The Company owns 45% of the outstanding equity of Powersem GmbH (“Powersem”), a module manufacturer based in Germany. EB-Tech Co., Ltd.: The Company owns approximately 19% of the outstanding equity of EB Tech Co., Ltd. (“EB Tech”), a company with expertise in radiation technology based in South Korea. Automated Technology (Phil), Inc. : The Company owns approximately 24% of the outstanding common shares of Automated Technology (Phil), Inc. (“ATEC”), a supplier located in the Philippines that provides assembly and test services. One member of the Company's Board of Directors serves on the Board of Directors of ATEC. For the Three Months Ended June 27, 2020 For the Three Months Ended June 29, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 0.3 $ — $ — $ 0.1 $ — $ — Purchase material/service from related party 0.8 — 1.6 0.9 0.1 2.3 For the Six Months Ended June 27, 2020 For the Six Months Ended June 29, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 0.7 $ — $ — $ 0.2 $ — $ — Purchase material/service from related party 1.0 — 3.4 1.7 0.2 3.8 June 27, 2020 December 28, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Accounts Receivable balance $ 0.1 $ — $ — $ — $ — $ — Accounts Payable balance 0.2 — 0.1 0.2 — 0.1 Additionally, the Company has certain cost method investments in VTOOL Ltd. and Securepush Ltd. with a total book value of $0.4 million as of June 27, 2020 and one member of the Company’s Board of Directors is currently an investor and a director of VTOOL Ltd. and Securepush Ltd. On April 26, 2019, the Company sold its subsidiary Microwave Technology, LLC. (“MWT”) resulting in a loss on disposal of $2.6 million reflected in Other income (expense), net in the Condensed Consolidated Statements of Net (Loss) Income. The

Segment Information

Segment Information	6 Months Ended
	Jun. 27, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information The Company and its subsidiaries design, manufacture and sell components and modules for circuit protection, power control and sensing throughout the world. The Company reports its operations by the following segments: Electronics, Automotive, and Industrial. An operating segment is defined as a component of an enterprise that engages in business activities from which it may earn revenues and incur expenses, and about which separate financial information is regularly evaluated by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources. The CODM is the Company’s President and Chief Executive Officer (“CEO”). The CODM allocates resources to and assesses the performance of each operating segment using information about its revenue and operating income (loss) before interest and taxes, but does not evaluate the operating segments using discrete balance sheet information. Sales, marketing, and research and development expenses are charged directly into each operating segment. Purchasing, logistics, customer service, finance, information technology, and human resources are shared functions that are allocated back to the three operating segments. The Company does not report inter-segment revenue because the operating segments do not record it. Certain expenses, determined by the CODM to be strategic in nature and not directly related to segments' current results, are not allocated but identified as “Other”. Additionally, the Company does not allocate interest and other income, interest expense, or taxes to operating segments. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Although the CODM uses operating income (loss) to evaluate the segments, operating costs included in one segment may benefit other segments. Except as discussed above, the accounting policies for segment reporting are the same as for the Company as a whole. • Electronics Segment : Consists of one of the broadest product offerings in the industry, including fuses and fuse accessories, positive temperature coefficient (“PTC”) resettable fuses, polymer electrostatic discharge (“ESD”) suppressors, varistors, reed switch based magnetic sensing, gas discharge tubes; semiconductor products such as discrete transient voltage suppressor (“TVS”) diodes, TVS diode arrays, protection and switching thyristors, metal-oxide-semiconductor field effect transistors (“MOSFETs”) and silicon carbide diodes; and insulated gate bipolar transistors (“IGBT”) technologies. The segment covers a broad range of end markets, including industrial and automotive electronics, electric vehicle and related infrastructure, data and telecommunications, medical devices, alternative energy, consumer electronics and white goods. • Automotive Segment: Consists of a wide range of circuit protection, power control and sensing technologies for global original equipment manufacturers (“OEMs”), Tier-I suppliers and parts distributors in passenger car, heavy duty truck, off-road vehicles, material handling, agricultural, construction and other commercial vehicle end markets. Passenger car fuse products include fuses and fuse accessories for internal combustion engine vehicles and hybrid and electric vehicles including blade fuses, battery cable protectors, resettable fuses, high-current fuses, and high-voltage fuses. Commercial vehicle products include fuses, switches, relays, and power distribution modules for the commercial vehicle industry. Automotive sensor products include a wide range of automotive and commercial vehicle products designed to monitor the passenger compartment occupants, safety and environment as well as the vehicle’s powertrain. • Industrial Segment: Consists of power fuses, protection relays and controls and other circuit protection products for use in various industrial applications such as oil, gas, mining, alternative energy, electric vehicle infrastructure, non-residential construction, HVAC systems, elevators and other industrial equipment. Segment information is summarized as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Net sales Electronics $ 223,271 $ 259,553 $ 437,460 $ 524,947 Automotive 61,999 108,650 166,769 222,133 Industrial 22,067 29,676 49,204 56,299 Total net sales $ 307,337 $ 397,879 $ 653,433 $ 803,379 Depreciation and amortization Electronics $ 15,617 $ 14,729 $ 31,148 30,071 Automotive 7,071 6,904 14,258 13,781 Industrial 1,046 1,056 2,130 2,116 Total depreciation and amortization $ 23,734 $ 22,689 $ 47,536 $ 45,968 Operating (loss) income Electronics $ 32,651 $ 43,630 $ 64,923 $ 92,666 Automotive (8,857) 10,349 5,259 23,550 Industrial (23) 5,831 3,511 9,336 Other (a) (35,721) (7,176) (40,893) (12,245) Total operating (loss) income (11,950) 52,634 32,800 113,307 Interest expense 5,855 5,589 11,273 11,275 Foreign exchange (gain) loss (6,010) (3,575) (3,426) 668 Other (income) expense, net (1,210) (2,947) 39 1,358 (Loss) income before income taxes $ (10,585) $ 53,567 $ 24,914 $ 100,006 (a) Included in “Other” Operating (loss) income for the 2020 second quarter is $0.1 million ($1.3 million year-to-date) of acquisition-related and integration charges related to the IXYS acquisition and other contemplated acquisitions. In addition, there was $35.6 million ($39.6 million year-to-date) of restructuring, impairment and other charges, primarily related to the goodwill impairment charge of $33.8 million recorded in the second quarter associated with the automotive sensors reporting unit within the Automotive segment, $1.8 million ($3.5 million year-to-date) of employee termination costs, and other restructuring charges and impairment charges of $2.2 million recorded in the first quarter associated with the announced consolidation of a manufacturing facility within the Industrial segment. See Note 4, Goodwill and Other Intangible Assets and Note 6, Restructuring, Impairment and Other Charges, for further discussion. Included in "Other" Operating income (loss) for the second quarter of 2019 is $1.5 million ($3.8 million year-to-date) of acquisition integration charges primarily related to the IXYS acquisition. In addition, there were $5.7 million ($8.4 million year-to-date) of restructuring charges primarily related to employee termination costs. The Company’s net sales by country were as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Net sales United States $ 76,870 $ 115,991 $ 179,780 $ 235,519 China 102,026 107,728 188,041 214,593 Other countries (a) 128,441 174,160 285,612 353,267 Total net sales $ 307,337 $ 397,879 $ 653,433 $ 803,379 The Company’s long-lived assets by country were as follows: (in thousands) June 27, December 28, Long-lived assets United States $ 54,082 $ 58,081 China 82,224 88,306 Mexico 67,967 73,096 Germany 36,721 36,025 Philippines 58,272 51,738 Other countries (a) 35,411 37,371 Total long-lived assets $ 334,677 $ 344,617 The Company’s additions to long-lived assets by country were as follows: Six Months Ended (in thousands) June 27, 2020 June 29, 2019 Additions to long-lived assets United States $ 2,026 $ 3,454 China 4,516 4,958 Mexico 4,260 8,727 Germany 2,509 3,712 Philippines 9,039 6,629 Other countries (a) 687 2,378 Total additions to long-lived assets $ 23,037 $ 29,858 (a) Each country included in other countries is less than 10% of net sales.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and Other Information (Policies)	6 Months Ended
	Jun. 27, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net (loss) income and comprehensive (loss) income, statements of cash flows, and statement of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 28, 2019 which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results.
Revenue Recognition	Revenue Recognition Revenue Disaggregation The following tables disaggregate the Company’s revenue by primary business units for the three and six months ended June 27, 2020 and June 29, 2019: Three Months Ended June 27, 2020 Six Months Ended June 27, 2020 (in thousands) Electronics Automotive Industrial Electronics Automotive Industrial Electronics – Passive Products and Sensors $ 92,846 $ — $ — $ 92,846 $ 177,444 $ — $ — $ 177,444 Electronics – Semiconductor 130,425 — — 130,425 260,016 — — 260,016 Passenger Car Products — 30,309 — 30,309 — 82,954 — 82,954 Automotive Sensors — 13,899 — 13,899 — 38,073 — 38,073 Commercial Vehicle Products — 17,791 — 17,791 — 45,742 — 45,742 Industrial Products — — 22,067 22,067 — — 49,204 49,204 Total $ 223,271 $ 61,999 $ 22,067 $ 307,337 $ 437,460 $ 166,769 $ 49,204 $ 653,433 Three Months Ended June 29, 2019 Six Months Ended June 29, 2019 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Electronics – Passive Products and Sensors $ 108,481 $ — $ — $ 108,481 $ 216,858 $ — $ — $ 216,858 Electronics – Semiconductor 151,072 — — 151,072 308,089 — — 308,089 Passenger Car Products — 53,916 — 53,916 — 110,459 — 110,459 Automotive Sensors — 24,682 — 24,682 — 50,739 — 50,739 Commercial Vehicle Products — 30,052 — 30,052 — 60,935 — 60,935 Industrial Products — — 29,676 29,676 — — 56,299 56,299 Total $ 259,553 $ 108,650 $ 29,676 $ 397,879 $ 524,947 $ 222,133 $ 56,299 $ 803,379 See Note 14, Segment Information for net sales by segment and countries. Revenue Recognition The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowance, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors. The Company elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year. Revenue and Billing The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue. Ship and Debit Program Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributor to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historic activity, electronic distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue. Return to Stock The Company has a return to stock policy whereby certain customers, with prior authorization from Littelfuse management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historic activity. Sales revenue and cost of sales are reduced to anticipate estimated returns. Volume Rebates The Company offers volume based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments." The standard modifies the measurement approach for credit losses on financial instruments, including trade receivables, from an incurred loss method to a current expected credit loss method ("CECL"). The standard requires the measurement of expected credit losses to be based on relevant information, including historical experiences, current conditions and a forecast that is supportable. The Company adopted the new standard on December 29, 2019. The adoption of the standard did not have a material effect on our Condensed Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-13 "Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirement for Fair Value Measurement." ASU 2018-13 modifies the disclosure requirements in Topic 820: "Fair Value Measurement," based on the FASB Concepts Statement, "Conceptual Framework for Financial Reporting - Chapter 8: Notes to Financial Statements," including consideration of costs and benefits. The new standard removes certain disclosures, modifies other disclosures and adds additional disclosures related to fair value measurement. The Company adopted the new standard on December 29, 2019. The adoption of ASU 2018- 13 did not have a material impact on our Condensed Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic: 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)." ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The Company adopted the new standard on December 29, 2019. The adoption of ASU 2018-15 did not have a material impact on our Condensed Consolidated Financial Statements. In March 2020, the FASB issued ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This ASU provides optional expedient and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The objective of this is to provide optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting due to the cessation of the London Interbank Offered Rate (LIBOR). The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company does not expect a material effect from the adoption of this guidance on its Condensed Consolidated Financial Statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and Other Information (Tables)	6 Months Ended
	Jun. 27, 2020
Accounting Policies [Abstract]
Schedule of revenue disaggregation	The following tables disaggregate the Company’s revenue by primary business units for the three and six months ended June 27, 2020 and June 29, 2019: Three Months Ended June 27, 2020 Six Months Ended June 27, 2020 (in thousands) Electronics Automotive Industrial Electronics Automotive Industrial Electronics – Passive Products and Sensors $ 92,846 $ — $ — $ 92,846 $ 177,444 $ — $ — $ 177,444 Electronics – Semiconductor 130,425 — — 130,425 260,016 — — 260,016 Passenger Car Products — 30,309 — 30,309 — 82,954 — 82,954 Automotive Sensors — 13,899 — 13,899 — 38,073 — 38,073 Commercial Vehicle Products — 17,791 — 17,791 — 45,742 — 45,742 Industrial Products — — 22,067 22,067 — — 49,204 49,204 Total $ 223,271 $ 61,999 $ 22,067 $ 307,337 $ 437,460 $ 166,769 $ 49,204 $ 653,433 Three Months Ended June 29, 2019 Six Months Ended June 29, 2019 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Electronics – Passive Products and Sensors $ 108,481 $ — $ — $ 108,481 $ 216,858 $ — $ — $ 216,858 Electronics – Semiconductor 151,072 — — 151,072 308,089 — — 308,089 Passenger Car Products — 53,916 — 53,916 — 110,459 — 110,459 Automotive Sensors — 24,682 — 24,682 — 50,739 — 50,739 Commercial Vehicle Products — 30,052 — 30,052 — 60,935 — 60,935 Industrial Products — — 29,676 29,676 — — 56,299 56,299 Total $ 259,553 $ 108,650 $ 29,676 $ 397,879 $ 524,947 $ 222,133 $ 56,299 $ 803,379

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 27, 2020
Inventory Disclosure [Abstract]
Schedule of inventory	The components of inventories at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Raw materials $ 82,133 $ 76,732 Work in process 92,681 84,561 Finished goods 106,904 110,388 Inventory Reserves (33,698) (34,174) Total $ 248,020 $ 237,507

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	6 Months Ended
	Jun. 27, 2020
Property, Plant and Equipment [Abstract]
Schedule of components of net property, plant, and equipment	The components of net property, plant, and equipment at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Land $ 23,095 $ 24,758 Building 118,409 108,501 Equipment 635,661 631,273 Accumulated depreciation and amortization (442,488) (419,915) Total $ 334,677 $ 344,617

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 27, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The amounts for goodwill and changes in the carrying value by segment for the six months ended June 27, 2020 are as follows: (in thousands) Electronics Automotive Industrial Total As of December 28, 2019 $ 650,796 $ 131,321 $ 38,472 $ 820,589 Impairments — (33,841) — (33,841) Currency translation 860 128 (135) 853 As of June 27, 2020 $ 651,656 $ 97,608 $ 38,337 $ 787,601
Schedule of finite-lived intangible assets	The components of other intangible assets as of June 27, 2020 and December 28, 2019 are as follows: As of June 27, 2020 (in thousands) Gross Accumulated Amortization Net Book Value Land use rights $ 9,584 $ 1,800 $ 7,784 Patents, licenses and software 131,055 $ 83,989 $ 47,066 Distribution network 43,272 37,302 5,970 Customer relationships, trademarks, and tradenames 360,769 119,928 240,841 Total $ 544,680 $ 243,019 $ 301,661 As of December 28, 2019 (in thousands) Gross Accumulated Amortization Net Book Value Land use rights $ 9,649 $ 1,730 $ 7,919 Patents, licenses and software 131,164 78,828 52,336 Distribution network 43,239 36,163 7,076 Customer relationships, trademarks, and tradenames 360,534 106,618 253,916 Total $ 544,586 $ 223,339 $ 321,247
Schedule of finite-lived intangible assets, future amortization expense	Estimated annual amortization expense related to intangible assets with definite lives as of June 27, 2020 is as follows: (in thousands) Amount 2020 $ 39,200 2021 37,811 2022 36,846 2023 32,135 2024 29,356 2025 and thereafter 145,511 Total $ 320,859

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	6 Months Ended
	Jun. 27, 2020
Payables and Accruals [Abstract]
Schedule of components of accrued liabilities	The components of accrued liabilities as of June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, 2020 December 28, 2019 Employee-related liabilities $ 40,785 $ 40,774 Operating lease liability 6,846 7,259 Interest 4,781 5,058 Professional services 3,130 3,986 Restructuring liability 4,463 2,679 Other non-income taxes 2,075 1,940 Other 23,276 22,424 Total $ 85,356 $ 84,120

Restructuring, Impairment and_2

Restructuring, Impairment and Other Charges (Tables)	6 Months Ended
	Jun. 27, 2020
Restructuring and Related Activities [Abstract]
Schedule of restructuring, impairment and other charges	The Company recorded restructuring, impairment and other charges for the three and six months ended June 27, 2020 and June 29, 2019 as follows: Three months ended June 27, 2020 Six months ended June 27, 2020 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Employee terminations $ 856 $ 209 $ 750 $ 1,815 $ 1,737 $ 608 $ 1,071 $ 3,416 Other restructuring charges (1) (12) 22 9 — 108 25 133 Total restructuring charges 855 197 772 1,824 1,737 716 1,096 3,549 Impairment — 33,841 — 33,841 — 33,841 2,237 36,078 Total $ 855 $ 34,038 $ 772 $ 35,665 $ 1,737 $ 34,557 $ 3,333 $ 39,627 Three months ended June 29, 2019 Six months ended June 29, 2019 (in thousands) Electronics Automotive Industrial Total Electronics Automotive Industrial Total Employee terminations $ 1,698 $ 3,241 $ 674 $ 5,613 $ 3,498 $ 3,846 $ 721 $ 8,065 Other restructuring charges — 70 — 70 13 90 250 353 Total restructuring charges 1,698 3,311 674 5,683 3,511 3,936 971 8,418 Impairment — — — — — — — — Total $ 1,698 $ 3,311 $ 674 $ 5,683 $ 3,511 $ 3,936 $ 971 $ 8,418

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 27, 2020
Debt Disclosure [Abstract]
Schedule of long-term debt instruments	The carrying amounts of debt at June 27, 2020 and December 28, 2019 are as follows: (in thousands) June 27, December 28, Revolving Credit Facility $ 240,000 $ — Term Loan — 145,000 Euro Senior Notes, Series A due 2023 131,378 129,808 Euro Senior Notes, Series B due 2028 106,675 105,400 U.S. Senior Notes, Series A due 2022 25,000 25,000 U.S. Senior Notes, Series B due 2027 100,000 100,000 U.S. Senior Notes, Series A due 2025 50,000 50,000 U.S. Senior Notes, Series B due 2030 125,000 125,000 Other 2,619 2,619 Unamortized debt issuance costs (4,467) (3,669) Total debt 776,205 679,158 Less: Current maturities — (10,000) Total long-term debt $ 776,205 $ 669,158

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	6 Months Ended
	Jun. 27, 2020
Fair Value Disclosures [Abstract]
Schedule of fair value, assets measured on recurring basis	The following table presents assets measured at fair value by classification within the fair value hierarchy as of June 27, 2020: Fair Value Measurements Using (in thousands) Quoted Prices in Significant Significant Total Cash Equivalents $ 148,409 $ — $ — $ 148,409 Investments in equity securities 12,899 — — 12,899 Mutual funds 10,650 — — 10,650 The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 28, 2019: Fair Value Measurements Using (in thousands) Quoted Prices in Significant Significant Total Cash Equivalents $ 118,999 $ — $ — $ 118,999 Investments in equity securities 12,969 — — 12,969 Mutual funds 10,464 — — 10,464
Schedule of fair value, by balance sheet grouping	The carrying value and estimated fair values of the Company’s Euro Senior Notes, Series A and Series B and USD Senior Notes, Series A and Series B, as of June 27, 2020 and December 28, 2019 were as follows: June 27, 2020 December 28, 2019 (in thousands) Carrying Estimated Carrying Estimated Euro Senior Notes, Series A due 2023 $ 131,378 $ 128,003 $ 129,808 $ 131,710 Euro Senior Notes, Series B due 2028 106,675 104,332 105,400 110,336 USD Senior Notes, Series A due 2022 25,000 25,150 25,000 25,054 USD Senior Notes, Series B due 2027 100,000 103,482 100,000 102,548 USD Senior Notes, Series A due 2025 50,000 51,355 50,000 50,775 USD Senior Notes, Series B due 2030 125,000 128,954 125,000 127,701
Details of impairment of long-lived assets held and used by asset	The fair value as of the measurement date, net book value as of June 27, 2020 and related the goodwill impairment charge for assets measured at fair value on nonrecurring basis subsequent to initial recognition during three months ended June 27, 2020 were as follows: Three Months Ended June 27, 2020 June 27, 2020 (in thousands) Impairment Charge Estimated Fair Value Measurement (Level 3) Carrying Value Goodwill $ 33,841 $ 8,953 $ 9,142

Benefit Plans (Tables)

Benefit Plans (Tables)	6 Months Ended
	Jun. 27, 2020
Retirement Benefits [Abstract]
Schedule of net benefit costs	The components of net periodic benefit cost for the three and six months ended June 27, 2020 and June 29, 2019 were as follows: For the Three Months Ended For the Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Components of net periodic benefit cost: Service cost $ 592 $ 514 $ 1,210 $ 1,014 Interest cost 486 813 1,144 1,597 Expected return on plan assets (402) (821) (1,129) (1,611) Amortization of prior service and net actuarial loss 264 62 409 124 Net periodic benefit cost $ 940 $ 568 $ 1,634 $ 1,124

Other Comprehensive (Loss) In_2

Other Comprehensive (Loss) Income (Tables)	6 Months Ended
	Jun. 27, 2020
Equity [Abstract]
Schedule of components of comprehensive income (loss)	Changes in other comprehensive (loss) income by component were as follows: (in thousands) Three Months Ended Three Months Ended Pre-tax Tax Net of Tax Pre-tax Tax Net of Tax Defined benefit pension plan adjustments $ (13,098) $ (2,259) $ (10,839) $ 201 $ 40 $ 161 Foreign currency translation adjustments 8,422 — 8,422 (5,892) — (5,892) Total change in other comprehensive income (loss) $ (4,676) $ (2,259) $ (2,417) $ (5,691) $ 40 $ (5,731) Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million to unamortized actuarial loss within other comprehensive (loss) income. See Note 9, Benefits Plans for further discussion. (in thousands) Six Months Ended June 27, 2020 Six Months Ended June 29, 2019 Pre-tax Tax Net of Tax Pre-tax Tax Net of Tax Defined benefit pension plan adjustments $ (12,543) $ (2,265) $ (10,278) $ 123 $ 11 $ 112 Foreign currency translation adjustments (7,118) — (7,118) 2,230 — 2,230 Total change in other comprehensive income (loss) $ (19,661) $ (2,265) $ (17,396) $ 2,353 $ 11 $ 2,342
Schedule of accumulated other comprehensive income (loss)	The following tables set forth the changes in accumulated other comprehensive (loss) income by component for the six months ended June 27, 2020 and June 29, 2019: (in thousands) Pension and Foreign Accumulated Balance at December 28, 2019 $ (18,046) $ (88,777) $ (106,823) Activity in the period (10,278) (7,118) (17,396) Balance at June 27, 2020 $ (28,324) $ (95,895) $ (124,219) (in thousands) Pension and Foreign Accumulated Balance at December 29, 2018 $ (9,959) $ (87,965) $ (97,924) Activity in the period 112 2,230 2,342 Balance at June 29, 2019 $ (9,847) $ (85,735) $ (95,582)
Summary of reclassification out of accumulated other comprehensive income	Amounts reclassified from accumulated other comprehensive (loss) income to earnings for the three and six months ended June 27, 2020 and June 29, 2019 were as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Pension and Postemployment plans: Amortization of prior service and net actuarial loss $ 429 $ 62 $ 774 $ 124

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 27, 2020
Earnings Per Share [Abstract]
Schedule of earnings per share, basic and diluted	The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Six Months Ended (in thousands, except per share amounts) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Numerator: Net (loss) income as reported $ (8,991) $ 43,792 $ 15,653 $ 80,781 Denominator: Weighted average shares outstanding Basic 24,312 24,740 24,353 24,729 Effect of dilutive securities — 243 167 269 Diluted 24,312 24,983 24,520 24,998 (Loss) Earnings Per Share: Basic (loss) earnings per share $ (0.37) $ 1.77 $ 0.64 $ 3.27 Diluted (loss) earnings per share $ (0.37) $ 1.75 $ 0.64 $ 3.23

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 27, 2020
Related Party Transactions [Abstract]
Schedule of related party transactions	For the Three Months Ended June 27, 2020 For the Three Months Ended June 29, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 0.3 $ — $ — $ 0.1 $ — $ — Purchase material/service from related party 0.8 — 1.6 0.9 0.1 2.3 For the Six Months Ended June 27, 2020 For the Six Months Ended June 29, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 0.7 $ — $ — $ 0.2 $ — $ — Purchase material/service from related party 1.0 — 3.4 1.7 0.2 3.8 June 27, 2020 December 28, 2019 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Accounts Receivable balance $ 0.1 $ — $ — $ — $ — $ — Accounts Payable balance 0.2 — 0.1 0.2 — 0.1

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 27, 2020
Segment Reporting [Abstract]
Schedule of segment reporting information, by segment	Segment information is summarized as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Net sales Electronics $ 223,271 $ 259,553 $ 437,460 $ 524,947 Automotive 61,999 108,650 166,769 222,133 Industrial 22,067 29,676 49,204 56,299 Total net sales $ 307,337 $ 397,879 $ 653,433 $ 803,379 Depreciation and amortization Electronics $ 15,617 $ 14,729 $ 31,148 30,071 Automotive 7,071 6,904 14,258 13,781 Industrial 1,046 1,056 2,130 2,116 Total depreciation and amortization $ 23,734 $ 22,689 $ 47,536 $ 45,968 Operating (loss) income Electronics $ 32,651 $ 43,630 $ 64,923 $ 92,666 Automotive (8,857) 10,349 5,259 23,550 Industrial (23) 5,831 3,511 9,336 Other (a) (35,721) (7,176) (40,893) (12,245) Total operating (loss) income (11,950) 52,634 32,800 113,307 Interest expense 5,855 5,589 11,273 11,275 Foreign exchange (gain) loss (6,010) (3,575) (3,426) 668 Other (income) expense, net (1,210) (2,947) 39 1,358 (Loss) income before income taxes $ (10,585) $ 53,567 $ 24,914 $ 100,006 (a) Included in “Other” Operating (loss) income for the 2020 second quarter is $0.1 million ($1.3 million year-to-date) of acquisition-related and integration charges related to the IXYS acquisition and other contemplated acquisitions. In addition, there was $35.6 million ($39.6 million year-to-date) of restructuring, impairment and other charges, primarily related to the goodwill impairment charge of $33.8 million recorded in the second quarter associated with the automotive sensors reporting unit within the Automotive segment, $1.8 million ($3.5 million year-to-date) of employee termination costs, and other restructuring charges and impairment charges of $2.2 million recorded in the first quarter associated with the announced consolidation of a manufacturing facility within the Industrial segment. See Note 4, Goodwill and Other Intangible Assets and Note 6, Restructuring, Impairment and Other Charges, for further discussion.
Schedule of disclosure on geographic areas, long-lived assets in individual foreign countries by country	The Company’s net sales by country were as follows: Three Months Ended Six Months Ended (in thousands) June 27, 2020 June 29, 2019 June 27, 2020 June 29, 2019 Net sales United States $ 76,870 $ 115,991 $ 179,780 $ 235,519 China 102,026 107,728 188,041 214,593 Other countries (a) 128,441 174,160 285,612 353,267 Total net sales $ 307,337 $ 397,879 $ 653,433 $ 803,379 The Company’s long-lived assets by country were as follows: (in thousands) June 27, December 28, Long-lived assets United States $ 54,082 $ 58,081 China 82,224 88,306 Mexico 67,967 73,096 Germany 36,721 36,025 Philippines 58,272 51,738 Other countries (a) 35,411 37,371 Total long-lived assets $ 334,677 $ 344,617 The Company’s additions to long-lived assets by country were as follows: Six Months Ended (in thousands) June 27, 2020 June 29, 2019 Additions to long-lived assets United States $ 2,026 $ 3,454 China 4,516 4,958 Mexico 4,260 8,727 Germany 2,509 3,712 Philippines 9,039 6,629 Other countries (a) 687 2,378 Total additions to long-lived assets $ 23,037 $ 29,858 (a) Each country included in other countries is less than 10% of net sales.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies and Other Information (Details Textual) customer in Thousands	6 Months Ended
	Jun. 27, 2020customer
Accounting Policies [Abstract]
Number of customers (over)	100

Summary of Significant Accoun_5

Summary of Significant Accounting Policies and Other Information - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue
Net sales	$ 307,337	$ 397,879	$ 653,433	$ 803,379
Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	92,846	108,481	177,444	216,858
Electronics – Semiconductor
Disaggregation of Revenue
Net sales	130,425	151,072	260,016	308,089
Passenger Car Products
Disaggregation of Revenue
Net sales	30,309	53,916	82,954	110,459
Automotive Sensors
Disaggregation of Revenue
Net sales	13,899	24,682	38,073	50,739
Commercial Vehicle Products
Disaggregation of Revenue
Net sales	17,791	30,052	45,742	60,935
Industrial Products
Disaggregation of Revenue
Net sales	22,067	29,676	49,204	56,299
Electronics Segment
Disaggregation of Revenue
Net sales	223,271	259,553	437,460	524,947
Electronics Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	92,846	108,481	177,444	216,858
Electronics Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	130,425	151,072	260,016	308,089
Electronics Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	0	0	0	0
Electronics Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	0	0	0	0
Electronics Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	0	0	0	0
Electronics Segment | Industrial Products
Disaggregation of Revenue
Net sales	0	0	0	0
Automotive Segment
Disaggregation of Revenue
Net sales	61,999	108,650	166,769	222,133
Automotive Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	0	0	0	0
Automotive Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	0	0	0	0
Automotive Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	30,309	53,916	82,954	110,459
Automotive Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	13,899	24,682	38,073	50,739
Automotive Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	17,791	30,052	45,742	60,935
Automotive Segment | Industrial Products
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment
Disaggregation of Revenue
Net sales	22,067	29,676	49,204	56,299
Industrial Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	0	0	0	0
Industrial Segment | Industrial Products
Disaggregation of Revenue
Net sales	$ 22,067	$ 29,676	$ 49,204	$ 56,299

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 82,133	$ 76,732
Work in process	92,681	84,561
Finished goods	106,904	110,388
Inventory Reserves	(33,698)	(34,174)
Total	$ 248,020	$ 237,507

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Property, Plant and Equipment
Accumulated depreciation and amortization	$ (442,488)		$ (442,488)		$ (419,915)
Total	334,677		334,677		344,617
Depreciation	13,900	$ 12,600	27,728	$ 25,727
Land
Property, Plant and Equipment
Property, plant, and equipment, gross	23,095		23,095		24,758
Building
Property, Plant and Equipment
Property, plant, and equipment, gross	118,409		118,409		108,501
Equipment
Property, Plant and Equipment
Property, plant, and equipment, gross	$ 635,661		$ 635,661		$ 631,273

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Amounts for Goodwill and Changes in Carrying Value by Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Goodwill
Balance			$ 820,589
Impairments	$ (33,841)	$ 0	(33,841)	$ 0
Currency translation			853
Balance	787,601		787,601
Electronics
Goodwill
Balance			650,796
Impairments			0
Currency translation			860
Balance	651,656		651,656
Automotive
Goodwill
Balance			131,321
Impairments			(33,841)
Currency translation			128
Balance	97,608		97,608
Industrial
Goodwill
Balance			38,472
Impairments			0
Currency translation			(135)
Balance	$ 38,337		$ 38,337

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Details of Other Intangible Assets and Related Future Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Finite-Lived Intangible Assets
Gross Carrying Value	$ 544,680	$ 544,586
Accumulated Amortization	243,019	223,339
Net Book Value	301,661	321,247
Land use rights
Finite-Lived Intangible Assets
Gross Carrying Value	9,584	9,649
Accumulated Amortization	1,800	1,730
Net Book Value	7,784	7,919
Patents, licenses and software
Finite-Lived Intangible Assets
Gross Carrying Value	131,055	131,164
Accumulated Amortization	83,989	78,828
Net Book Value	47,066	52,336
Distribution network
Finite-Lived Intangible Assets
Gross Carrying Value	43,272	43,239
Accumulated Amortization	37,302	36,163
Net Book Value	5,970	7,076
Customer relationships, trademarks, and tradenames
Finite-Lived Intangible Assets
Gross Carrying Value	360,769	360,534
Accumulated Amortization	119,928	106,618
Net Book Value	$ 240,841	$ 253,916

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Estimated Amortization Expense Related to Intangible Assets with Definite Lives (Details) $ in Thousands	Jun. 27, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 39,200
2021	37,811
2022	36,846
2023	32,135
2024	29,356
2025 and thereafter	145,511
Total	$ 320,859

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Goodwill [Line Items]
Goodwill impairment charge	$ 33,841	$ 0	$ 33,841	$ 0
Goodwill	787,601		787,601		$ 820,589
Amortization of intangibles	9,827	$ 10,050	19,808	$ 20,241
Impairment of intangibles			300
Automotive Sensors
Goodwill [Line Items]
Goodwill	$ 9,100		$ 9,100

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Payables and Accruals [Abstract]
Employee-related liabilities	$ 40,785	$ 40,774
Operating lease liability	6,846	7,259
Interest	4,781	5,058
Professional services	3,130	3,986
Restructuring liability	4,463	2,679
Other non-income taxes	2,075	1,940
Other	23,276	22,424
Total	$ 85,356	$ 84,120
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent

Restructuring, Impairment and_3

Restructuring, Impairment and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Restructuring Cost and Reserve
Total restructuring charges	$ 1,824		$ 5,683	$ 3,549	$ 8,418
Impairment charges	33,841		0	36,078	0
Restructuring costs	35,665		5,683	39,627	8,418
Restructuring reserves	4,500			4,500		$ 2,700
Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	1,815		5,613	3,416	8,065
Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	9		70	133	353
Electronics
Restructuring Cost and Reserve
Total restructuring charges	855		1,698	1,737	3,511
Impairment charges	0		0	0	0
Restructuring costs	855		1,698	1,737	3,511
Electronics | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	856		1,698	1,737	3,498
Electronics | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	(1)		0	0	13
Automotive
Restructuring Cost and Reserve
Total restructuring charges	197		3,311	716	3,936
Impairment charges	33,841		0	33,841	0
Restructuring costs	34,038		3,311	34,557	3,936
Automotive | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	209		3,241	608	3,846
Automotive | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	(12)		70	108	90
Industrial
Restructuring Cost and Reserve
Total restructuring charges	772		674	1,096	971
Impairment charges	0		0	2,237	0
Restructuring costs	772		674	3,333	971
Industrial | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	750		674	1,071	721
Industrial | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	$ 22		$ 0	$ 25	$ 250
Industrial | Facility Closing
Restructuring Cost and Reserve
Impairment charges		$ 2,200

Debt - Carrying Amounts of Long

Debt - Carrying Amounts of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Apr. 02, 2020	Dec. 28, 2019
Debt Instrument
Unamortized debt issuance costs	$ (4,467)		$ (3,669)
Total debt	776,205		679,158
Less: Current maturities	0		(10,000)
Total long-term debt	776,205		669,158
Revolving Credit Facility
Debt Instrument
Long-term debt, gross	240,000		0
Term Loan
Debt Instrument
Long-term debt, gross	0	$ 140,000	145,000
Euro Senior Notes, Series A due 2023
Debt Instrument
Long-term debt, gross	131,378		129,808
Euro Senior Notes, Series B due 2028
Debt Instrument
Long-term debt, gross	106,675		105,400
U.S. Senior Notes, Series A due 2022
Debt Instrument
Long-term debt, gross	25,000		25,000
U.S. Senior Notes, Series B due 2027
Debt Instrument
Long-term debt, gross	100,000		100,000
U.S. Senior Notes, Series A due 2025
Debt Instrument
Long-term debt, gross	50,000		50,000
U.S. Senior Notes, Series B due 2030
Debt Instrument
Long-term debt, gross	125,000		125,000
Other
Debt Instrument
Long-term debt, gross	$ 2,619		$ 2,619

Debt - Narrative (Details)

Debt - Narrative (Details)	Apr. 03, 2020USD ($)	Mar. 25, 2020USD ($)	Jan. 16, 2018USD ($)	Oct. 13, 2017USD ($)advance	Mar. 04, 2016USD ($)	Jun. 27, 2020USD ($)	Jun. 29, 2019USD ($)	Jun. 27, 2020USD ($)	Jun. 29, 2019USD ($)	Apr. 02, 2020USD ($)	Dec. 28, 2019USD ($)	Nov. 15, 2017USD ($)series	Oct. 12, 2017USD ($)	Feb. 15, 2017USD ($)	Dec. 08, 2016USD ($)series	Dec. 08, 2016EUR (€)series
Debt Instrument
Proceeds of revolving credit facility		$ 100,000,000						$ 240,000,000	$ 0
Cash paid during the period for interest						$ 3,400,000	$ 3,500,000	$ 10,799,000	$ 11,478,000
Credit Agreement
Debt Instrument
Debt term (in years)					5 years
Maximum borrowing capacity					$ 700,000,000
Additional uncommitted borrowing capacity				$ 300,000,000	150,000,000
Additional uncommitted borrowing capacity, minimum increments					$ 25,000,000
Number of advances | advance				2
Effective interest rate (percent)						1.70%		1.70%
Letter of credit outstanding (less than)						$ 0		$ 0
Credit Agreement | Minimum
Debt Instrument
Commitment fee (percent)					0.125%
Credit Agreement | Maximum
Debt Instrument
Commitment fee (percent)					0.20%
Credit Agreement | LIBOR | Minimum
Debt Instrument
Basis spread on variable rate (percent)					1.25%
Credit Agreement | LIBOR | Maximum
Debt Instrument
Basis spread on variable rate (percent)					2.00%
Credit Agreement | Base Rate | Minimum
Debt Instrument
Basis spread on variable rate (percent)					0.25%
Credit Agreement | Base Rate | Maximum
Debt Instrument
Basis spread on variable rate (percent)					1.00%
Credit Agreement | Revolving Credit Facility
Debt Instrument
Maximum borrowing capacity				$ 700,000,000	$ 575,000,000								$ 575,000,000
Remaining borrowing capacity						148,600,000		148,600,000
Credit Agreement | Term Loan Credit Facility
Debt Instrument
Maximum borrowing capacity, credit facility				200,000,000	$ 125,000,000
Proceeds from issuance of debt			$ 75,000,000	$ 125,000,000
Quarterly payments, percentage of loan (percent)				1.25%
Periodic payment				$ 2,500,000
Repayments of debt						2,500,000		5,000,000
Revolving Credit Facility
Debt Instrument
Long-term debt, gross						240,000,000		240,000,000			$ 0
Term Loan
Debt Instrument
Elimination of unsecured team loan facility	$ 200,000,000
Long-term debt, gross						0		0		$ 140,000,000	145,000,000
Euro Senior Notes, Series A and B
Debt Instrument
Face amount of debt | €																€ 212,000,000
Number of series | series												2			2	2
Euro Senior Notes, Series A due 2023
Debt Instrument
Long-term debt, gross						131,378,000		131,378,000			129,808,000
Face amount of debt | €																€ 117,000,000
Stated interest rate (percent)															1.14%	1.14%
Euro Senior Notes, Series B due 2028
Debt Instrument
Long-term debt, gross						106,675,000		106,675,000			105,400,000
Face amount of debt | €																€ 95,000,000
Stated interest rate (percent)															1.83%	1.83%
U.S. Senior Notes, Series A and B
Debt Instrument
Face amount of debt															$ 125,000,000
U.S. Senior Notes, Series A
Debt Instrument
Face amount of debt														$ 25,000,000
Stated interest rate (percent)														3.03%
U.S. Senior Notes, Series B
Debt Instrument
Face amount of debt														$ 100,000,000
Stated interest rate (percent)														3.74%
US Senior Notes A and B Due 2025 and 2030
Debt Instrument
Face amount of debt												$ 175,000,000
U.S. Senior Notes, Series A due 2025
Debt Instrument
Long-term debt, gross						50,000,000		50,000,000			50,000,000
Face amount of debt			$ 50,000,000
Stated interest rate (percent)			3.48%
U.S. Senior Notes, Series B due 2030
Debt Instrument
Long-term debt, gross						$ 125,000,000		$ 125,000,000			$ 125,000,000
Face amount of debt			$ 125,000,000
Stated interest rate (percent)			3.78%

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	$ 148,409	$ 118,999
Investments in equity securities	12,899	12,969
Mutual funds	10,650	10,464
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	148,409	118,999
Investments in equity securities	12,899	12,969
Mutual funds	10,650	10,464
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	0	0
Investments in equity securities	0	0
Mutual funds	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	0	0
Investments in equity securities	0	0
Mutual funds	$ 0	$ 0

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Carrying Value and Estimated Fair Value of Senior Notes (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Carrying Value | Euro Senior Notes, Series A due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	$ 131,378	$ 129,808
Carrying Value | Euro Senior Notes, Series B due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	106,675	105,400
Carrying Value | U.S. Senior Notes, Series A due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	25,000	25,000
Carrying Value | U.S. Senior Notes, Series B due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	100,000	100,000
Carrying Value | U.S. Senior Notes, Series A due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	50,000	50,000
Carrying Value | U.S. Senior Notes, Series B due 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	125,000	125,000
Estimated Fair Value | Euro Senior Notes, Series A due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	128,003	131,710
Estimated Fair Value | Euro Senior Notes, Series B due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	104,332	110,336
Estimated Fair Value | U.S. Senior Notes, Series A due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	25,150	25,054
Estimated Fair Value | U.S. Senior Notes, Series B due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	103,482	102,548
Estimated Fair Value | U.S. Senior Notes, Series A due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	51,355	50,775
Estimated Fair Value | U.S. Senior Notes, Series B due 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	$ 128,954	$ 127,701

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Narrative (Details) - USD ($)	Mar. 23, 2020	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges		$ 33,841,000		$ 0	$ 36,078,000	$ 0
Investments in equity securities		12,899,000			12,899,000		$ 12,969,000
Notional amount of derivatives							16,000,000
Gain on derivatives	$ 200,000
Other Expense (Income)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges						$ 2,800,000
Investments in equity securities		$ 400,000			$ 400,000		$ 400,000
Patents
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges			$ 300,000
Land and Building
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges			$ 1,900,000

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities - Impairment of Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 27, 2020	Dec. 28, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Goodwill	$ 787,601	$ 820,589
Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment Charge	33,841
Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Goodwill	8,953
Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Goodwill	$ 9,142

Benefit Plans - Benefit Plan Ex

Benefit Plans - Benefit Plan Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Retirement Benefits [Abstract]
Service cost	$ 592	$ 514	$ 1,210	$ 1,014
Interest cost	486	813	1,144	1,597
Expected return on plan assets	(402)	(821)	(1,129)	(1,611)
Amortization of prior service and net actuarial loss	264	62	409	124
Net periodic benefit cost	$ 940	$ 568	$ 1,634	$ 1,124

Benefit Plans - Narrative (Deta

Benefit Plans - Narrative (Details) $ in Thousands, £ in Millions	Apr. 06, 2020USD ($)	Apr. 06, 2020GBP (£)	Jun. 27, 2020USD ($)	Jun. 27, 2020GBP (£)	Jun. 29, 2019USD ($)	Dec. 31, 2021USD ($)	Jun. 27, 2020USD ($)	Jun. 29, 2019USD ($)	Apr. 07, 2020USD ($)
Defined Benefit Plan Disclosure
Contributions expected			$ 2,300				$ 2,300
Defined benefit plan expense			940		$ 568		1,634	$ 1,124
Estimated decrease in pension cost									$ 36,000
Estimated percent reduction in pension costs									30.00%
Defined Benefit Plan, Benefit Obligation, Benefits Paid			10,400	£ 8.4
Pension and postretirement liability and reclassification adjustments
Defined Benefit Plan Disclosure
Benefit obligation,unamortized actuarial loss	$ 13,400	£ 10.9
Foreign Plan
Defined Benefit Plan Disclosure
Defined benefit plan expense			500		$ 200		1,000	$ 400
Other comprehensive income as component of net period benefit cost, before tax			$ 200				$ 400
Minimum | Forecast
Defined Benefit Plan Disclosure
Estimated settlement charge						$ 18,000
Maximum | Forecast
Defined Benefit Plan Disclosure
Estimated settlement charge						$ 22,000

Other Comprehensive (Loss) In_3

Other Comprehensive (Loss) Income - Schedule of Components of Comprehensive Income (Loss) (Details) $ in Thousands, £ in Millions	Apr. 06, 2020USD ($)	Apr. 06, 2020GBP (£)	Jun. 27, 2020USD ($)	Mar. 28, 2020USD ($)	Jun. 29, 2019USD ($)	Mar. 30, 2019USD ($)	Jun. 27, 2020USD ($)	Jun. 29, 2019USD ($)
Other Comprehensive Income (Loss)
Pre-tax			$ (4,676)		$ (5,691)		$ (19,661)	$ 2,353
Tax			(2,259)		40		(2,265)	11
Total change in other comprehensive income (loss)			(2,417)	$ (14,979)	(5,731)	$ 8,073	(17,396)	2,342
Pension and postretirement liability and reclassification adjustments
Other Comprehensive Income (Loss)
Pre-tax			(13,098)		201		(12,543)	123
Tax			(2,259)		40		(2,265)	11
Total change in other comprehensive income (loss)			(10,839)		161		(10,278)	112
Benefit obligation,unamortized actuarial loss	$ 13,400	£ 10.9
Foreign currency translation adjustment
Other Comprehensive Income (Loss)
Pre-tax			8,422		(5,892)		(7,118)	2,230
Tax			0		0		0	0
Total change in other comprehensive income (loss)			$ 8,422		$ (5,892)		$ (7,118)	$ 2,230

Other Comprehensive (Loss) In_4

Other Comprehensive (Loss) Income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019	Jun. 27, 2020	Jun. 29, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	$ 1,476,948	$ 1,496,014	$ 1,505,388	$ 1,478,342	$ 1,496,014	$ 1,478,342
Other comprehensive loss, net of tax	(2,417)	(14,979)	(5,731)	8,073	(17,396)	2,342
Balance	1,462,434	1,476,948	1,509,942	1,505,388	1,462,434	1,509,942
Pension and postretirement liability and reclassification adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance		(18,046)		(9,959)	(18,046)	(9,959)
Other comprehensive loss, net of tax	(10,839)		161		(10,278)	112
Balance	(28,324)		(9,847)		(28,324)	(9,847)
Foreign currency translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance		(88,777)		(87,965)	(88,777)	(87,965)
Other comprehensive loss, net of tax	8,422		(5,892)		(7,118)	2,230
Balance	(95,895)		(85,735)		(95,895)	(85,735)
Accumulated other comprehensive (loss) income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	(121,802)	(106,823)	(89,851)	(97,924)	(106,823)	(97,924)
Other comprehensive loss, net of tax	(2,417)	(14,979)	(5,731)	8,073
Balance	$ (124,219)	$ (121,802)	$ (95,582)	$ (89,851)	$ (124,219)	$ (95,582)

Other Comprehensive (Loss) In_5

Other Comprehensive (Loss) Income - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amortization of prior service and net actuarial loss	$ 208,238	$ 256,071	$ 430,622	$ 506,343
Amortization of prior service and net actuarial loss | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amortization of prior service and net actuarial loss	$ 429	$ 62	$ 774	$ 124

Income Taxes (Details Textual)

Income Taxes (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	15.10%	18.20%	37.20%	19.20%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019	Jun. 27, 2020	Jun. 29, 2019
Numerator:
Net (loss) income as reported	$ (8,991)	$ 24,644	$ 43,792	$ 36,989	$ 15,653	$ 80,781
Weighted average shares outstanding
Basic (in shares)	24,312		24,740		24,353	24,729
Effect of dilutive securities (in shares)	0		243		167	269
Diluted (in shares)	24,312		24,983		24,520	24,998
(Loss) Earnings Per Share:
Basic (loss) earnings per share (in dollars per share)	$ (0.37)		$ 1.77		$ 0.64	$ 3.27
Diluted (loss) earnings per share (in dollars per share)	$ (0.37)		$ 1.75		$ 0.64	$ 3.23

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019	Jun. 27, 2020	Jun. 29, 2019	Apr. 23, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share
Shares repurchased (in shares)	0
Repurchases of common stock		$ 22,927	$ 31,955	$ 13,555
Share Repurchase Program
Antidilutive Securities Excluded from Computation of Earnings Per Share
Repurchase authorized (in shares)	1,000,000				1,000,000		1,000,000
Shares repurchased (in shares)			188,214		175,110	268,130
Repurchases of common stock			$ 32,000		$ 22,900	$ 45,500
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded (in shares)	328,624		167,599		212,290	121,326

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	Apr. 26, 2019	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Related Party Transaction
Cost method investments		$ 0.4		$ 0.4
MWT
Related Party Transaction
Loss on disposal	$ 2.6
Powersem
Related Party Transaction
Ownership percentage (percent)		45.00%		45.00%
Revenue from related parties		$ 0.3	$ 0.1	$ 0.7	$ 0.2
Purchase from related party		0.8	0.9	1	1.7
Receivable from related parties		0.1		0.1		$ 0
Payables to related parties		$ 0.2		$ 0.2		0.2
EB Tech
Related Party Transaction
Ownership percentage (percent)		19.00%		19.00%
Revenue from related parties		$ 0	0	$ 0	0
Purchase from related party		0	0.1	0	0.2
Receivable from related parties		0		0		0
Payables to related parties		$ 0		$ 0		0
ATEC
Related Party Transaction
Ownership percentage (percent)		24.00%		24.00%
Revenue from related parties		$ 0	0	$ 0	0
Purchase from related party		1.6	$ 2.3	3.4	$ 3.8
Receivable from related parties		0		0		0
Payables to related parties		$ 0.1		$ 0.1		$ 0.1

Segment Information - Segment I

Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Segment Reporting Information
Net sales	$ 307,337		$ 397,879	$ 653,433	$ 803,379
Depreciation and amortization	23,734		22,689	47,536	45,968
Operating (loss) income	(11,950)		52,634	32,800	113,307
Interest expense	5,855		5,589	11,273	11,275
Foreign exchange (gain) loss	(6,010)		(3,575)	(3,426)	668
Other (income) expense, net	(1,210)		(2,947)	39	1,358
(Loss) income before income taxes	(10,585)		53,567	24,914	100,006
Electronics
Segment Reporting Information
Net sales	223,271		259,553	437,460	524,947
Depreciation and amortization	15,617		14,729	31,148	30,071
Automotive
Segment Reporting Information
Net sales	61,999		108,650	166,769	222,133
Depreciation and amortization	7,071		6,904	14,258	13,781
Impairment charges		$ 2,200
Automotive | Facility Closing
Segment Reporting Information
Impairment charges	33,800
Industrial
Segment Reporting Information
Net sales	22,067		29,676	49,204	56,299
Depreciation and amortization	1,046		1,056	2,130	2,116
Operating Segments | Electronics
Segment Reporting Information
Operating (loss) income	32,651		43,630	64,923	92,666
Operating Segments | Automotive
Segment Reporting Information
Operating (loss) income	(8,857)		10,349	5,259	23,550
Operating Segments | Industrial
Segment Reporting Information
Operating (loss) income	(23)		5,831	3,511	9,336
Corporate Non-Segment | Other
Segment Reporting Information
Operating (loss) income	$ (35,721)		$ (7,176)	$ (40,893)	$ (12,245)

Segment Information - Narrative

Segment Information - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020USD ($)	Jun. 29, 2019USD ($)	Jun. 27, 2020USD ($)segment	Jun. 29, 2019USD ($)
Segment Reporting Information
Number of operating segments | segment			3
Restructuring charges	$ 1,824	$ 5,683	$ 3,549	$ 8,418
Operating Income (Loss)
Segment Reporting Information
Acquisition related costs		1,500		3,800
Other | Operating Income (Loss)
Segment Reporting Information
Legal, accounting and other expenses	100		1,300
Restructuring charges	35,600		39,600
Industrial
Segment Reporting Information
Restructuring charges	$ 772	$ 674	$ 1,096	$ 971

Segment Information - Revenues

Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Segment Reporting Information
Net sales	$ 307,337	$ 397,879	$ 653,433	$ 803,379
Long-lived assets	334,677		334,677		$ 344,617
Additions to long-lived assets			23,037	29,858
United States
Segment Reporting Information
Net sales	76,870	115,991	179,780	235,519
Long-lived assets	54,082		54,082		58,081
Additions to long-lived assets			2,026	3,454
China
Segment Reporting Information
Net sales	102,026	107,728	188,041	214,593
Long-lived assets	82,224		82,224		88,306
Additions to long-lived assets			4,516	4,958
Mexico
Segment Reporting Information
Long-lived assets	67,967		67,967		73,096
Additions to long-lived assets			4,260	8,727
Germany
Segment Reporting Information
Long-lived assets	36,721		36,721		36,025
Additions to long-lived assets			2,509	3,712
Philippines
Segment Reporting Information
Long-lived assets	58,272		58,272		51,738
Additions to long-lived assets			9,039	6,629
Other countries
Segment Reporting Information
Net sales	128,441	$ 174,160	285,612	353,267
Long-lived assets	$ 35,411		35,411		$ 37,371
Additions to long-lived assets			$ 687	$ 2,378