Vishay Intertechnology (VSH) 10-Q 4 May 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Apr. 03, 2021	Apr. 30, 2021
Entity Listings [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Apr. 3, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity Registrant Name	Vishay Intertechnology, Inc.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-07416
Entity Tax Identification Number	38-1686453
Entity Address, Address Line One	63 Lancaster Avenue
Entity Address, City or Town	Malvern
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19355
City Area Code	610
Local Phone Number	644-1300
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Small Business	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000103730
Title of 12(b) Security	Common stock, par value $0.10 per share
Trading Symbol	VSH
Security Exchange Name	NYSE
Common stock, par value $0.10 per share [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		132,710,732
Class B Convertible Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		12,097,148

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Apr. 03, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 643,847	$ 619,874
Short-term investments	137,348	158,476
Accounts receivable, net	385,238	338,632
Inventories:
Finished goods	129,310	120,792
Work in process	212,273	201,259
Raw materials	132,373	126,200
Total inventories	473,956	448,251
Prepaid expenses and other current assets	140,536	132,103
Total current assets	1,780,925	1,697,336
Property and equipment, at cost:
Land	75,339	76,231
Buildings and improvements	629,550	641,041
Machinery and equipment	2,705,346	2,732,771
Construction in progress	94,981	86,520
Allowance for depreciation	(2,587,948)	(2,593,398)
Property and equipment, net	917,268	943,165
Right of use assets	98,001	102,440
Goodwill	157,693	158,183
Other intangible assets, net	64,123	66,795
Other assets	192,552	186,554
Total assets	3,210,562	3,154,473
Current liabilities:
Trade accounts payable	206,741	196,203
Payroll and related expenses	136,069	141,034
Lease liabilities	21,275	22,074
Other accrued expenses	197,246	182,642
Income taxes	26,715	20,470
Total current liabilities	588,046	562,423
Long-term debt less current portion	453,213	394,886
U.S. transition tax payable	125,438	125,438
Deferred income taxes	1,856	1,852
Long-term lease liabilities	82,260	86,220
Other liabilities	103,881	104,356
Accrued pension and other postretirement costs	287,407	300,113
Total liabilities	1,642,101	1,575,288
Redeemable convertible debentures	0	170
Vishay stockholders' equity
Common stock	13,271	13,256
Class B convertible common stock	1,210	1,210
Capital in excess of par value	1,345,284	1,409,200
Retained earnings	217,214	138,990
Accumulated other comprehensive income (loss)	(11,526)	13,559
Total Vishay stockholders' equity	1,565,453	1,576,215
Noncontrolling interests	3,008	2,800
Total equity	1,568,461	1,579,015
Total liabilities, temporary equity, and equity	$ 3,210,562	$ 3,154,473

Consolidated Condensed Statemen

Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Consolidated Condensed Statements of Operations [Abstract]
Net revenues	$ 764,632	$ 612,841
Costs of products sold	561,683	465,601
Gross profit	202,949	147,240
Selling, general, and administrative expenses	105,685	99,832
Operating income	97,264	47,408
Other income (expense):
Interest expense	(4,376)	(8,552)
Loss on early extinguishment of debt	0	(2,920)
Other	(5,731)	198
Total other income (expense)	(10,107)	(11,274)
Income before taxes	87,157	36,134
Income tax expense	15,514	8,750
Net earnings	71,643	27,384
Less: net earnings attributable to noncontrolling interests	208	165
Net earnings attributable to Vishay stockholders	$ 71,435	$ 27,219
Basic earnings per share attributable to Vishay stockholders (in dollars per share)	$ 0.49	$ 0.19
Diluted earnings per share attributable to Vishay stockholders (in dollars per share)	$ 0.49	$ 0.19
Weighted average shares outstanding - basic (in shares)	144,968	144,792
Weighted average shares outstanding - diluted (in shares)	145,463	145,295
Cash dividends per share (in dollars per share)	$ 0.095	$ 0.095

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Consolidated Statements of Comprehensive Income [Abstract]
Net earnings	$ 71,643	$ 27,384
Other comprehensive income (loss), net of tax
Pension and other post-retirement actuarial items	1,864	1,601
Foreign currency translation adjustment	(26,949)	(23,129)
Other comprehensive income (loss)	(25,085)	(21,528)
Comprehensive income	46,558	5,856
Less: comprehensive income attributable to noncontrolling interests	208	165
Comprehensive income attributable to Vishay stockholders	$ 46,350	$ 5,691

Consolidated Condensed Statem_2

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Operating activities
Net earnings	$ 71,643	$ 27,384
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	42,146	41,520
(Gain) loss on disposal of property and equipment	(177)	(45)
Accretion of interest on convertible debt instruments	0	3,637
Inventory write-offs for obsolescence	4,784	5,643
Deferred income taxes	901	(3,517)
Loss on extinguishment of debt	0	2,920
Other	5,728	3,524
Net change in operating assets and liabilities	(67,703)	(46,588)
Net cash provided by operating activities	57,322	34,478
Investing activities
Capital expenditures	(28,527)	(24,328)
Proceeds from sale of property and equipment	200	53
Purchase of short-term investments	(12,853)	(35,463)
Maturity of short-term investments	29,519	0
Other investing activities	347	(1,507)
Net cash provided by (used in) investing activities	(11,314)	(61,245)
Financing activities
Repurchase of convertible debt instruments	(300)	(19,849)
Net proceeds (payments) on revolving credit lines	0	54,000
Net changes in short-term borrowings	0	85
Cash withholding taxes paid when shares withheld for vested equity awards	(1,963)	(1,991)
Net cash provided by (used in) financing activities	(16,020)	18,504
Effect of exchange rate changes on cash and cash equivalents	(6,015)	(5,167)
Net increase (decrease) in cash and cash equivalents	23,973	(13,430)
Cash and cash equivalents at beginning of period	619,874	694,133
Cash and cash equivalents at end of period	643,847	680,703
Common Stock [Member]
Operating activities
Net earnings	0	0
Financing activities
Dividends paid to common stockholders	(12,608)	(12,592)
Class B Convertible Common Stock [Member]
Operating activities
Net earnings	0	0
Financing activities
Dividends paid to common stockholders	$ (1,149)	$ (1,149)

Consolidated Condensed Statem_3

Consolidated Condensed Statements of Equity - USD ($) $ in Thousands	Capital In Excess of Par Value [Member]	Capital In Excess of Par Value [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings (Accumulated Deficit) [Member]	Retained Earnings (Accumulated Deficit) [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Total Vishay Stockholders' Equity [Member]	Total Vishay Stockholders' Equity [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Common Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Class B Convertible Common Stock [Member]	Class B Convertible Common Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Period Start at Dec. 31, 2019	$ 1,425,170		$ 72,180		$ (26,646)		$ 1,485,149		$ 2,540		$ 1,487,689		$ 13,235		$ 1,210
Net earnings	0		27,219		0		27,219		165		27,384		0		0
Other comprehensive income	0		0		(21,528)		(21,528)		0		(21,528)		0		0
Conversion of Class B shares	0		0		0		0		0		0		0		0
Temporary equity reclassification	174		0		0		174		0		174		0		0
Issuance of stock and related tax withholdings for vested restricted stock units	(2,011)		0		0		(1,991)		0		(1,991)		20		0
Dividends declared			(13,759)		0		(13,741)		0		(13,741)		0		0
Dividends declared (APIC)	18
Stock compensation expense	2,998		0		0		2,998		0		2,998		0		0
Repurchase of convertible debt instruments	(10,089)		0		0		(10,089)		0		(10,089)		0		0
Balance at Period End at Apr. 04, 2020	1,416,260		84,570		(48,174)		1,467,121		2,705		1,469,826		13,255		1,210
Cumulative effect of accounting change for adoption of ASU		$ 0		$ (1,070)		$ 0		$ (1,070)		$ 0		$ (1,070)		$ 0		$ 0
Cumulative effect of accounting change for adoption of ASU											138,990	20,566
Balance at Period Start at Dec. 31, 2020	1,409,200		138,990		13,559		1,576,215		2,800		1,579,015		13,256		1,210
Net earnings	0		71,435		0		71,435		208		71,643		0		0
Other comprehensive income	0		0		(25,085)		(25,085)		0		(25,085)		0		0
Issuance of stock and related tax withholdings for vested restricted stock units	(1,978)		0		0		(1,963)		0		(1,963)		15		0
Dividends declared			(13,777)		0		(13,757)		0		(13,757)		0		0
Dividends declared (APIC)	20
Stock compensation expense	4,120		0		0		4,120		0		4,120		0		0
Balance at Period End at Apr. 03, 2021	$ 1,345,284		$ 217,214		$ (11,526)		$ 1,565,453		$ 3,008		1,568,461		$ 13,271		$ 1,210
Cumulative effect of accounting change for adoption of ASU		$ (66,078)		$ 20,566		$ 0		$ (45,512)		$ 0	$ 217,214	$ (45,512)		$ 0		$ 0

Consolidated Condensed Statem_4

Consolidated Condensed Statements of Equity (Parenthetical) - $ / shares	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Consolidated Condensed Statements of Equity (Parenthetical) [Abstract]
Conversion of Class B shares (in shares)		18
Restricted stock issuances (in shares)	149,722	199,251
Dividends declared (in dollars per share)	$ 0.095	$ 0.095

Basis of Presentation

Basis of Presentation	3 Months Ended
	Apr. 03, 2021
Basis of Presentation [Abstract]
Basis of Presentation	Note 1 – Basis of Presentation The accompanying unaudited consolidated condensed financial statements of Vishay Intertechnology, Inc. (“Vishay” or the “Company”) have been prepared in accordance with the instructions to Form 10-Q and therefore do not include all information and footnotes necessary for presentation of financial position, results of operations, and cash flows required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements. The information furnished reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair summary of the financial position, results of operations, and cash flows for the interim periods presented. The financial statements should be read in conjunction with the consolidated financial statements filed with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. The results of operations for the fiscal quarter and three fiscal months ended April 3, 2021 are not necessarily indicative of the results to be expected for the full year. The Company reports interim financial information for 13-week periods beginning on a Sunday and ending on a Saturday, except for the first fiscal quarter, which always begins on January 1, and the fourth fiscal quarter, which always ends on December 31. The four fiscal quarters in 2021 end on April 3, 2021, July 3, 2021, October 2, 2021, and December 31, 2021, respectively. The four fiscal quarters in 2020 ended on April 4, 2020, July 4, 2020, October 3, 2020, and December 31, 2020, respectively. Recently Adopted Accounting Guidance In August 2020, the Financial Accounting Standards Board ("FASB") issued ASU No. 2020-06, Debt – Debt With Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation.

Leases

Leases	3 Months Ended
	Apr. 03, 2021
Leases [Abstract]
Leases	Note 2 – Leases The net right of use assets and lease liabilities recognized on the consolidated condensed balance sheets for the Company's operating leases were as follows: April 3, 2021 December 31, 2020 Right of use assets Operating Leases Buildings and improvements $ 92,951 $ 97,429 Machinery and equipment 5,050 5,011 Total $ 98,001 $ 102,440 Current lease liabilities Operating Leases Buildings and improvements $ 18,622 $ 19,370 Machinery and equipment 2,653 2,704 Total $ 21,275 $ 22,074 Long-term lease liabilities Operating Leases Buildings and improvements $ 79,895 $ 83,926 Machinery and equipment 2,365 2,294 Total $ 82,260 $ 86,220 Total lease liabilities $ 103,535 $ 108,294 Lease expense is classified on the statement of operations based on asset use. Total lease cost recognized on the consolidated condensed statements of operations is as follows: Fiscal quarters ended April 3, 2021 April 4, 2020 Lease expense Operating lease expense $ 6,152 $ 5,652 Short-term lease expense 325 194 Variable lease expense 127 23 Total lease expense $ 6,604 $ 5,869 The Company paid $6,161 and $5,609 for its operating leases in the three fiscal months ended April 3, 2021 and April 4, 2020, respectively, which are included in operating cash flows on the consolidated condensed statements of cash flows. The weighted-average remaining lease term for the Company's operating leases is 8.7 years and the weighted-average discount rate is 5.9% as of April 3, 2021. The undiscounted future lease payments for the Company's operating lease liabilities are as follows: April 3, 2021 2021 (excluding the three fiscal months ended April 3, 2021) $ 16,736 2022 19,360 2023 16,198 2024 14,165 2025 13,026 Thereafter 54,010 The undiscounted future lease payments presented in the table above include payments through the term of the lease, which may include periods beyond the noncancellable term. The difference between the total payments above and the lease liability balance is due to the discount rate used to calculate lease liabilities.

Restructuring and Related Activ

Restructuring and Related Activities	3 Months Ended
	Apr. 03, 2021
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities	Note 3 – Restructuring and Related Activities I The following table summarizes the activity to date related to this program: Expense recorded in 2019 $ 24,139 Cash paid (1,330 ) Foreign currency translation 35 Balance at December 31, 2019 $ 22,844 Expense recorded in 2020 743 Cash paid (10,813 ) Foreign currency translation 683 Balance at December 31, 2020 $ 13,457 Cash paid (8,447 ) Foreign currency translation (96 ) Balance at April 3, 2021 $ 4,914 The payment terms vary by country, but generally are paid in a lump sum at cessation of employment. Some payments are made over an extended period. The current portion of the liability is $3,479 and is included in other accrued expenses on the consolidated condensed balance sheet. The non-current portion of the liability is $1,435 and is included in other liabilities on the consolidated condensed balance sheet.

Income Taxes

Income Taxes	3 Months Ended
	Apr. 03, 2021
Income Taxes [Abstract]
Income Taxes	Note 4 – Income Taxes The provision for income taxes consists of provisions for federal, state, and foreign income taxes. The effective tax rates for the periods ended April 3, 2021 and April 4, 2020 reflect the Company’s expected tax rate on reported income before income tax and tax adjustments. The Company operates in a global environment with significant operations in various jurisdictions outside the United States. Accordingly, the consolidated income tax rate is a composite rate reflecting the Company’s earnings and the applicable tax rates in the various jurisdictions where the Company operates. The Company adjusted its deferred tax balances by $12,127 upon the adoption of ASU No. 2020-06 on January 1, 2021, which was included in the cumulative-effect adjustment recorded to retained earnings. See Note 1. The Company recognized a tax benefit of $4,395 due to a change in tax regulations during the fiscal quarter ended April 3, 2021. During the fiscal quarter ended April 3, 2021, the liabilities for unrecognized tax benefits decreased by $1,485 on a net basis, primarily due to a payment and currency translation adjustments, partially offset by accruals for current year tax positions and interest.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Apr. 03, 2021
Long-Term Debt [Abstract]
Long-Term Debt	Note 5 – Long-Term Debt Long-term debt consists of the following: April 3, 2021 December 31, 2020 Credit facility $ - $ - Convertible senior notes, due 2025 465,344 406,268 Convertible senior debentures, due 2040 - 130 Deferred financing costs (12,131 ) (11,512 ) 453,213 394,886 Less current portion - - $ 453,213 $ 394,886 The following table summarizes some key facts and terms regarding the outstanding convertible senior notes due 2025 as of April 3, 2021: Convertible Senior Notes Due 2025 Issuance date June 12, 2018 Maturity date June 15, 2025 Principal amount as of April 3, 2021 $ 465,344 Cash coupon rate (per annum) 2.25 % Nonconvertible debt borrowing rate at issuance (per annum) 5.50 % Conversion rate effective March 16, 2021 (per $1 principal amount) 31.8965 Effective conversion price effective March 16, 2021 (per share) $ 31.35 % of the conversion price (per share) $ 40.76 Call date n/a Effective January 1, 2021, Vishay adopted ASU No. 2020-06. Upon adoption, Vishay derecognized the bifurcated equity component, debt discount, and deferred taxes and remeasured the deferred financing costs associated with its convertible debt instruments. See Note 1. The carrying value of Vishay's convertible debt instruments is now equal to the outstanding principal amount and interest expense is now equal to the cash interest paid. The remeasured deferred financing costs continue to be recognized as non-cash interest expense. Prior to December 15, 2024, the holders of the convertible senior notes due 2025 may convert their notes only under the following circumstances: (1) during any fiscal quarter after the fiscal quarter ending September 29, 2018, if the sale price of Vishay common stock reaches 130% of the conversion price for a specified period; (2) the trading price of the notes falls below 98% of the product of the sale price of Vishay's common stock and the conversion rate for a specified period; or (3) upon the occurrence of specified corporate transactions. The convertible senior notes due 2025 are not currently convertible. Upon conversion of the convertible senior notes due 2025, Vishay will satisfy its conversion obligations by paying $1 cash per $1 principal amount of converted notes and settle any additional amounts due in common stock. The quarterly cash dividend program of the Company results in adjustments to the conversion rate and effective conversion price for the convertible senior notes due 2025 effective as of the ex-dividend date of each cash dividend. The conversion rate and effective conversion price for the convertible senior notes due 2025 is adjusted for quarterly cash dividends to the extent such dividends exceed $0.085 per share of common stock. As of December 31, 2020, there were $300 of convertible senior debentures due 2040 outstanding. On January 5, 2021, Vishay gave notice to the holders of its convertible senior debentures due 2040 that Vishay would redeem the debentures on February 4, 2021. The redemption price was paid in cash and was equal to 100% of the principal amount plus accrued but unpaid interest to, but excluding February 4, 2021. The carrying value of the convertible senior notes due 2025 was $465,344 as of April 3, 2021. The carrying value of the liability and equity components of the convertible debt instruments prior to the adoption of ASU No. 2020-06 are reflected in the Company’s consolidated condensed balance sheet as follows: Principal amount of the debt instruments Unamortized discount Carrying value of liability component Equity component (including temporary equity) -net carrying value December 31, 2020 Convertible senior notes due 2025 $ 465,344 (59,076 ) $ 406,268 $ 66,127 Convertible senior debentures due 2040 $ 300 (170 ) $ 130 $ 121 Total $ 465,644 $ (59,246 ) $ 406,398 $ 66,248 Interest is payable on the convertible debt instruments semi-annually at the cash coupon rate. Prior to the adoption of ASU 2020-06 on January 1, 2021, the debt discount associated with the convertible debt instruments was amortized as additional non-cash interest expense using an effective annual interest rate equal to the Company’s estimated nonconvertible debt borrowing rate at the time of issuance. Interest expense related to the convertible debt instruments is reflected on the consolidated condensed statements of operations for the fiscal quarters ended: Contractual coupon interest Non-cash amortization of debt discount Other non-cash interest expense Total interest expense related to the debt instruments April 3, 2021 Convertible senior notes due 2025 $ 2,618 - 433 $ 3,051 April 4, 2020 Convertible senior notes due 2025 $ 3,375 3,617 454 $ 7,446 Convertible senior debentures $ 44 20 - $ 64 Total $ 3,419 $ 3,637 $ 454 $ 7,510 Other non-cash interest expense includes amortization of deferred financing costs. Interest expense related to the convertible senior debentures was immaterial in 2021.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Apr. 03, 2021
Revenue Recognition [Abstract]
Revenue Recognition	Note 6 – Revenue Recognition Sales returns and allowances accrual activity is shown below: Fiscal quarters ended April 3, 2021 April 4, 2020 Beginning balance $ 39,629 $ 40,508 Sales allowances 23,796 22,632 Credits issued (28,446 ) (27,982 ) Foreign currency (530 ) (346 ) Ending balance $ 34,449 $ 34,812 See disaggregated revenue information in Note 10.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Apr. 03, 2021
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 7 – Accumulated Other Comprehensive Income (Loss) The cumulative balance of each component of other comprehensive income (loss) and the income tax effects allocated to each component are as follows: Pension and other post- retirement actuarial items Currency translation adjustment Total Balance at January 1, 2021 $ (77,075 ) $ 90,634 $ 13,559 Other comprehensive income before reclassifications - (26,949 ) $ (26,949 ) Tax effect - - $ - Other comprehensive income before reclassifications, net of tax - (26,949 ) $ (26,949 ) Amounts reclassified out of AOCI 2,659 - $ 2,659 Tax effect (795 ) - $ (795 ) Amounts reclassified out of AOCI, net of tax 1,864 - $ 1,864 Net other comprehensive income $ 1,864 $ (26,949 ) $ (25,085 ) Balance at April 3, 2021 $ (75,211 ) $ 63,685 $ (11,526 ) Reclassifications of pension and other post-retirement actuarial items out of AOCI are included in the computation of net periodic benefit cost. See Note 8 for further information.

Pensions and Other Postretireme

Pensions and Other Postretirement Benefits	3 Months Ended
	Apr. 03, 2021
Pensions and Other Postretirement Benefits [Abstract]
Pensions and Other Postretirement Benefits	Note 8 – Pensions and Other Postretirement Benefits The Company maintains various retirement benefit plans. The service cost component of net periodic pension cost is classified in costs of products sold or selling, general, and administrative expenses on the consolidated condensed statements of operations based on the respective employee's function. The other components of net periodic pension cost are classified as other expense on the consolidated condensed statements of operations. Defined Benefit Pension Plans The following table shows the components of the net periodic pension cost for the first fiscal quarters of 2021 and 2020 for the Company’s defined benefit pension plans: Fiscal quarter ended April 3, 2021 Fiscal quarter ended April 4, 2020 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Net service cost $ - $ 1,190 $ - $ 1,074 Interest cost 254 754 342 924 Expected return on plan assets - (417 ) - (495 ) Amortization of prior service cost 36 51 36 30 Amortization of losses 447 1,884 298 1,592 Curtailment and settlement losses - 199 - 229 Net periodic benefit cost $ 737 $ 3,661 $ 676 $ 3,354 Other Postretirement Benefits The following table shows the components of the net periodic benefit cost for the first fiscal quarters of 2021 and 2020 for the Company’s other postretirement benefit plans: Fiscal quarter ended April 3, 2021 Fiscal quarter ended April 4, 2020 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ 25 $ 71 $ 28 $ 69 Interest cost 41 11 59 15 Amortization of losses (gains) 13 29 7 31 Net periodic benefit cost $ 79 $ 111 $ 94 $ 115

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Apr. 03, 2021
Stock-Based Compensation [Abstract]
Stock-Based Compensation	Note 9 – Stock-Based Compensation The Company has various stockholder-approved programs which allow for the grant of stock-based compensation to officers, employees, and non-employee directors of the Company. The amount of compensation cost related to stock-based payment transactions is measured based on the grant-date fair value of the equity instruments issued. The Company determines compensation cost for restricted stock units (“RSUs”) and phantom stock units based on the grant-date fair value of the underlying common stock adjusted for expected dividends paid over the required vesting period for non-participating awards. Compensation cost is recognized over the period that an officer, employee, or non-employee director provides service in exchange for the award. The following table summarizes stock-based compensation expense recognized: Fiscal quarters ended April 3, 2021 April 4, 2020 Restricted stock units $ 3,911 $ 2,783 Phantom stock units 209 215 Total $ 4,120 $ 2,998 The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at April 3, 2021 (amortization periods in years) Unrecognized Compensation Cost Weighted Average Remaining Amortization Periods Restricted stock units $ 5,885 1.1 Phantom stock units - n/a Total $ 5,885 The Company currently expects all performance-based RSUs to vest and all of the associated unrecognized compensation cost for performance-based RSUs presented in the table above to be recognized. Restricted Stock Units RSU activity under the 2007 Program as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of RSUs in thousands) Number of RSUs Weighted Average Grant-date Fair Value per Unit Outstanding: January 1, 2021 793 $ 18.90 Granted 319 22.07 Vested* (235 ) 18.79 Cancelled or forfeited - - Outstanding at April 3, 2021 877 $ 20.08 Expected to vest at April 3, 2021 877 * The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements. The number of performance-based RSUs that are scheduled to vest increases ratably based on the achievement of defined performance criteria between the established target and maximum levels. RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands) Vesting Date Expected to Vest Not Expected to Vest Total January 1, 2022 174 - 174 January 1, 2023 152 - 152 January 1, 2024 165 - 165 Phantom Stock Units Phantom stock unit activity under the phantom stock plan as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of phantom stock units in thousands) Number of units Grant-date Fair Value per Unit Outstanding: January 1, 2021 198 Granted 10 $ 20.89 Dividend equivalents issued 1 Outstanding at April 3, 2021 209

Segment Information

Segment Information	3 Months Ended
	Apr. 03, 2021
Segment Information [Abstract]
Segment Information	Note 10 – Segment Information The following tables set forth business segment information: MOSFETs Diodes Optoelectronic Components Resistors Inductors Capacitors Corporate / Other* Total Fiscal quarter ended April 3, 2021 : Net revenues $ 153,223 $ 157,178 $ 77,771 $ 186,602 $ 83,458 $ 106,400 $ - $ 764,632 Gross profit $ 37,108 $ 34,416 $ 25,626 $ 53,973 $ 27,751 $ 24,075 $ - $ 202,949 Segment operating income $ 27,207 $ 28,821 $ 21,210 $ 47,376 $ 25,290 $ 18,863 $ - $ 168,767 Fiscal quarter ended April 4, 2020 : Net revenues $ 116,893 $ 115,343 $ 54,179 $ 159,208 $ 73,785 $ 93,433 $ - $ 612,841 Gross profit $ 28,152 $ 19,518 $ 14,585 $ 44,773 $ 22,987 $ 20,355 $ (3,130 ) $ 147,240 Segment operating income $ 18,658 $ 14,422 $ 10,686 $ 38,885 $ 20,310 $ 15,070 $ (3,130 ) $ 114,901 * Amounts reported in Corporate/Other above represent unallocated costs directly related to the COVID-19 pandemic, which are reported as costs of products sold on the consolidated condensed statement of operations. Fiscal quarters ended April 3, 2021 April 4, 2020 Reconciliation: Segment Operating Income $ 168,767 $ 114,901 Impact of COVID-19 Pandemic on Selling, General, and Administrative Expenses - (317 ) Unallocated Selling, General, and Administrative Expenses (71,503 ) (67,176 ) Consolidated Operating Income $ 97,264 $ 47,408 Unallocated Other Income (Expense) (10,107 ) (11,274 ) Consolidated Income Before Taxes $ 87,157 $ 36,134 The Company has a broad line of products that it sells to OEMs, EMS companies, and independent distributors. The distribution of sales by customer type is shown below: Fiscal quarters ended April 3, 2021 April 4, 2020 Distributors $ 424,125 $ 305,446 OEMs 294,637 261,129 EMS companies 45,870 46,266 Total Revenue $ 764,632 $ 612,841 Net revenues were attributable to customers in the following regions: Fiscal quarters ended April 3, 2021 April 4, 2020 Asia $ 322,460 $ 217,084 Europe 268,323 233,052 Americas 173,849 162,705 Total Revenue $ 764,632 $ 612,841 The Company generates substantially all of its revenue from product sales to end customers in the industrial, automotive, telecommunications, computing, consumer products, power supplies, military and aerospace, and medical end markets. Sales by end market are presented below: Fiscal quarters ended April 3, 2021 April 4, 2020 Industrial $ 270,801 $ 215,111 Automotive 255,973 201,943 Telecommunications 24,902 29,692 Computing 59,899 45,223 Consumer Products 40,795 20,553 Power Supplies 35,246 25,194 Military and Aerospace 41,538 43,935 Medical 35,478 31,190 Total revenue $ 764,632 $ 612,841

Earnings Per Share

Earnings Per Share	3 Months Ended
	Apr. 03, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Note 11 – Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share attributable to Vishay stockholders (shares in thousands) Fiscal quarters ended April 3, 2021 April 4, 2020 Numerator: Net earnings attributable to Vishay stockholders $ 71,435 $ 27,219 Denominator: Denominator for basic earnings per share: Weighted average shares 144,760 144,599 Outstanding phantom stock units 208 193 Adjusted weighted average shares - basic 144,968 144,792 Effect of dilutive securities: Convertible debt instruments 9 95 Restricted stock units 486 408 Dilutive potential common shares 495 503 Denominator for diluted earnings per share: Adjusted weighted average shares - diluted 145,463 145,295 Basic earnings per share attributable to Vishay stockholders $ 0.49 $ 0.19 Diluted earnings per share attributable to Vishay stockholders $ 0.49 $ 0.19 Diluted earnings per share for the periods presented do not reflect the following weighted average potential common shares that would have an antidilutive effect or have unsatisfied performance conditions (in thousands) Fiscal quarters ended April 3, 2021 April 4, 2020 Convertible debt instruments: Convertible senior notes due 2025 - 19,088 Convertible senior debentures due 2041 - 88 Weighted average other 317 325 If the average market price of Vishay common stock is less than the effective conversion price of the convertible senior notes due 2025, no shares are included in the diluted earnings per share computation for the convertible senior notes due 2025. Upon Vishay exercising its existing right to legally amend the indenture governing the convertible senior notes due 2025, he average market price of Vishay common stock is less than the effective conversion price of the convertible senior notes due 2025.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Apr. 03, 2021
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 12 – Fair Value Measurements The fair value measurement accounting guidance establishes a valuation hierarchy of the inputs used to measure fair value. This hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3: Unobservable inputs that reflect the Company’s own assumptions. An asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. There have been no changes in the classification of any financial instruments within the fair value hierarchy in the periods presented. The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis: Total Fair Value Level 1 Level 2 Level 3 April 3, 2021 Assets: Assets held in rabbi trusts $ 56,143 $ 31,352 $ 24,791 $ - Available for sale securities $ 4,641 4,641 - - $ 60,784 $ 35,993 $ 24,791 $ - December 31, 2020 Assets: Assets held in rabbi trusts $ 57,892 $ 34,145 23,747 $ - Available for sale securities $ 4,917 4,917 - - $ 62,809 $ 39,062 $ 23,747 $ - The Company maintains non-qualified trusts, referred to as “rabbi” trusts, to fund payments under deferred compensation and non-qualified pension plans. Rabbi trust assets consist primarily of marketable securities, classified as available-for-sale and company-owned life insurance assets. The marketable securities held in the rabbi trusts are valued using quoted market prices on the last business day of the period. The company-owned life insurance assets are valued in consultation with the Company’s insurance brokers using the value of underlying assets of the insurance contracts. The fair value measurement of the marketable securities held in the rabbi trust is considered a Level 1 measurement and the measurement of the company-owned life insurance assets is considered a Level 2 measurement within the fair value hierarchy. The Company holds investments in debt securities that are intended to fund a portion of its pension and other postretirement benefit obligations outside of the United States. The investments are valued based on quoted market prices on the last business day of the period. The fair value measurement of the investments is considered a Level 1 measurement within the fair value hierarchy. The Company enters into forward contracts with highly-rated financial institutions to mitigate the foreign currency risk associated with intercompany loans denominated in a currency other than the legal entity's functional currency. The notional amount of the forward contracts was $100,000 as of April 3, 2021 and December 31, 2020. The forward contracts are short-term in nature and are expected to be renewed at the Company's discretion until the intercompany loans are repaid. We have not designated the forward contracts as hedges for accounting purposes, and as such the change in the fair value of the contracts is recognized in the consolidated condensed statement of operations as a component of other income (expense). The Company estimates the fair value of the forward contracts based on applicable and commonly used pricing models using current market information and is considered a Level 2 measurement within the fair value hierarchy. The value of the forward contracts was immaterial as of April 3, 2021 and December 31, 2020. The Company does not utilize derivatives or other financial instruments for trading or other speculative purposes. The fair value of the long-term debt, excluding the derivative liabilities and deferred financing costs, at April 3, 2021 and December 31, 2020 is approximately $517,700 and $491,400, respectively, compared to its carrying value, excluding the deferred financing costs, of $465,344 and $406,398, respectively. The Company estimates the fair value of its long-term debt using a combination of quoted market prices for similar financing arrangements and expected future payments discounted at risk-adjusted rates, which are considered Level 2 inputs. At April 3, 2021 and December 31, 2020, the Company’s short-term investments were comprised of time deposits with financial institutions that have maturities that exceed 90 days from the date of acquisition; however they all mature within one year from the respective balance sheet dates. The Company's short-term investments are accounted for as held-to-maturity debt instruments, at amortized cost, which approximates their fair value. The investments are funded with excess cash not expected to be needed for operations prior to maturity; therefore, the Company believes it has the intent and ability to hold the short-term investments until maturity. At each reporting date, the Company performs an evaluation to determine if any unrealized losses are other-than-temporary. No other-than-temporary impairments have been recognized on these securities, and there are no unrecognized holding gains or losses for these securities during the periods presented. There have been no transfers to or from the held-to-maturity classification. All decreases in the account balance are due to returns of principal at the securities’ maturity dates. Interest on the securities is recognized as interest income when earned. At April 3, 2021 and December 31, 2020, the Company’s cash and cash equivalents were comprised of demand deposits, time deposits with maturities of three months or less when purchased, and money market funds. The Company estimates the fair value of its cash, cash equivalents, and short-term investments using level 2 inputs. Based on the current interest rates for similar investments with comparable credit risk and time to maturity, the fair value of the Company's cash, cash equivalents, and held-to-maturity short-term investments approximate the carrying amounts reported in the consolidated condensed balance sheets. The Company’s financial instruments also include accounts receivable, short-term notes payable, and accounts payable. The carrying amounts for these financial instruments reported in the consolidated condensed balance sheets approximate their fair values.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Apr. 03, 2021
Basis of Presentation [Abstract]
Fiscal Period, Policy	The Company reports interim financial information for 13-week periods beginning on a Sunday and ending on a Saturday, except for the first fiscal quarter, which always begins on January 1, and the fourth fiscal quarter, which always ends on December 31. The four fiscal quarters in 2021 end on April 3, 2021, July 3, 2021, October 2, 2021, and December 31, 2021, respectively. The four fiscal quarters in 2020 ended on April 4, 2020, July 4, 2020, October 3, 2020, and December 31, 2020, respectively.
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance In August 2020, the Financial Accounting Standards Board ("FASB") issued ASU No. 2020-06, Debt – Debt With Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation.

Income Taxes (Policies)

Income Taxes (Policies)	3 Months Ended
	Apr. 03, 2021
Income Taxes [Abstract]
Effective Income Tax Rate Description	The provision for income taxes consists of provisions for federal, state, and foreign income taxes. The effective tax rates for the periods ended April 3, 2021 and April 4, 2020 reflect the Company’s expected tax rate on reported income before income tax and tax adjustments. The Company operates in a global environment with significant operations in various jurisdictions outside the United States. Accordingly, the consolidated income tax rate is a composite rate reflecting the Company’s earnings and the applicable tax rates in the various jurisdictions where the Company operates.

Stock-Based Compensation (Polic

Stock-Based Compensation (Policies)	3 Months Ended
	Apr. 03, 2021
Stock-Based Compensation [Abstract]
Share-based Compensation, Option and Incentive Plans Policy	The amount of compensation cost related to stock-based payment transactions is measured based on the grant-date fair value of the equity instruments issued. The Company determines compensation cost for restricted stock units (“RSUs”) and phantom stock units based on the grant-date fair value of the underlying common stock adjusted for expected dividends paid over the required vesting period for non-participating awards. Compensation cost is recognized over the period that an officer, employee, or non-employee director provides service in exchange for the award.

Earnings Per Share (Policies)

Earnings Per Share (Policies)	3 Months Ended
	Apr. 03, 2021
Earnings Per Share [Abstract]
Discussion on convertible debt included in computation of earnings per share diluted	If the average market price of Vishay common stock is less than the effective conversion price of the convertible senior notes due 2025, no shares are included in the diluted earnings per share computation for the convertible senior notes due 2025. Upon Vishay exercising its existing right to legally amend the indenture governing the convertible senior notes due 2025, he average market price of Vishay common stock is less than the effective conversion price of the convertible senior notes due 2025.

Fair Value Measurements (Polici

Fair Value Measurements (Policies)	3 Months Ended
	Apr. 03, 2021
Fair Value Measurements [Abstract]
Fair Value of Financial Instruments, Policy	The fair value measurement accounting guidance establishes a valuation hierarchy of the inputs used to measure fair value. This hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3: Unobservable inputs that reflect the Company’s own assumptions. An asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. There have been no changes in the classification of any financial instruments within the fair value hierarchy in the periods presented.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Apr. 03, 2021
Leases [Abstract]
Right of Use Assets and Lease Liabilities	The net right of use assets and lease liabilities recognized on the consolidated condensed balance sheets for the Company's operating leases were as follows: April 3, 2021 December 31, 2020 Right of use assets Operating Leases Buildings and improvements $ 92,951 $ 97,429 Machinery and equipment 5,050 5,011 Total $ 98,001 $ 102,440 Current lease liabilities Operating Leases Buildings and improvements $ 18,622 $ 19,370 Machinery and equipment 2,653 2,704 Total $ 21,275 $ 22,074 Long-term lease liabilities Operating Leases Buildings and improvements $ 79,895 $ 83,926 Machinery and equipment 2,365 2,294 Total $ 82,260 $ 86,220 Total lease liabilities $ 103,535 $ 108,294
Lease Expense	Lease expense is classified on the statement of operations based on asset use. Total lease cost recognized on the consolidated condensed statements of operations is as follows: Fiscal quarters ended April 3, 2021 April 4, 2020 Lease expense Operating lease expense $ 6,152 $ 5,652 Short-term lease expense 325 194 Variable lease expense 127 23 Total lease expense $ 6,604 $ 5,869
Undiscounted Future Lease Payments for Operating Lease Liabilities	The undiscounted future lease payments for the Company's operating lease liabilities are as follows: April 3, 2021 2021 (excluding the three fiscal months ended April 3, 2021) $ 16,736 2022 19,360 2023 16,198 2024 14,165 2025 13,026 Thereafter 54,010

Restructuring and Related Act_2

Restructuring and Related Activities (Tables)	3 Months Ended
	Apr. 03, 2021
Restructuring and Related Activities [Abstract]
Restructuring and Related Expenses	The following table summarizes the activity to date related to this program: Expense recorded in 2019 $ 24,139 Cash paid (1,330 ) Foreign currency translation 35 Balance at December 31, 2019 $ 22,844 Expense recorded in 2020 743 Cash paid (10,813 ) Foreign currency translation 683 Balance at December 31, 2020 $ 13,457 Cash paid (8,447 ) Foreign currency translation (96 ) Balance at April 3, 2021 $ 4,914

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Apr. 03, 2021
Long-Term Debt [Abstract]
Long-term Debt Instruments	Long-term debt consists of the following: April 3, 2021 December 31, 2020 Credit facility $ - $ - Convertible senior notes, due 2025 465,344 406,268 Convertible senior debentures, due 2040 - 130 Deferred financing costs (12,131 ) (11,512 ) 453,213 394,886 Less current portion - - $ 453,213 $ 394,886
Key Facts and Terms of the Convertible Debt Instruments	The following table summarizes some key facts and terms regarding the outstanding convertible senior notes due 2025 as of April 3, 2021: Convertible Senior Notes Due 2025 Issuance date June 12, 2018 Maturity date June 15, 2025 Principal amount as of April 3, 2021 $ 465,344 Cash coupon rate (per annum) 2.25 % Nonconvertible debt borrowing rate at issuance (per annum) 5.50 % Conversion rate effective March 16, 2021 (per $1 principal amount) 31.8965 Effective conversion price effective March 16, 2021 (per share) $ 31.35 % of the conversion price (per share) $ 40.76 Call date n/a
Liability and Equity of Component of Convertible Debt Instruments	The carrying value of the convertible senior notes due 2025 was $465,344 as of April 3, 2021. The carrying value of the liability and equity components of the convertible debt instruments prior to the adoption of ASU No. 2020-06 are reflected in the Company’s consolidated condensed balance sheet as follows: Principal amount of the debt instruments Unamortized discount Carrying value of liability component Equity component (including temporary equity) -net carrying value December 31, 2020 Convertible senior notes due 2025 $ 465,344 (59,076 ) $ 406,268 $ 66,127 Convertible senior debentures due 2040 $ 300 (170 ) $ 130 $ 121 Total $ 465,644 $ (59,246 ) $ 406,398 $ 66,248
Convertible Debt Instruments, Interest Expense	Interest expense related to the convertible debt instruments is reflected on the consolidated condensed statements of operations for the fiscal quarters ended: Contractual coupon interest Non-cash amortization of debt discount Other non-cash interest expense Total interest expense related to the debt instruments April 3, 2021 Convertible senior notes due 2025 $ 2,618 - 433 $ 3,051 April 4, 2020 Convertible senior notes due 2025 $ 3,375 3,617 454 $ 7,446 Convertible senior debentures $ 44 20 - $ 64 Total $ 3,419 $ 3,637 $ 454 $ 7,510

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Apr. 03, 2021
Revenue Recognition [Abstract]
Sales returns and allowances accrual activity	Sales returns and allowances accrual activity is shown below: Fiscal quarters ended April 3, 2021 April 4, 2020 Beginning balance $ 39,629 $ 40,508 Sales allowances 23,796 22,632 Credits issued (28,446 ) (27,982 ) Foreign currency (530 ) (346 ) Ending balance $ 34,449 $ 34,812

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Apr. 03, 2021
Accumulated Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss) and Income Tax Effects Allocated	The cumulative balance of each component of other comprehensive income (loss) and the income tax effects allocated to each component are as follows: Pension and other post- retirement actuarial items Currency translation adjustment Total Balance at January 1, 2021 $ (77,075 ) $ 90,634 $ 13,559 Other comprehensive income before reclassifications - (26,949 ) $ (26,949 ) Tax effect - - $ - Other comprehensive income before reclassifications, net of tax - (26,949 ) $ (26,949 ) Amounts reclassified out of AOCI 2,659 - $ 2,659 Tax effect (795 ) - $ (795 ) Amounts reclassified out of AOCI, net of tax 1,864 - $ 1,864 Net other comprehensive income $ 1,864 $ (26,949 ) $ (25,085 ) Balance at April 3, 2021 $ (75,211 ) $ 63,685 $ (11,526 )

Pensions and Other Postretire_2

Pensions and Other Postretirement Benefits (Tables)	3 Months Ended
	Apr. 03, 2021
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost for Pension and Other Postretirement Benefit Plans	The following table shows the components of the net periodic pension cost for the first fiscal quarters of 2021 and 2020 for the Company’s defined benefit pension plans: Fiscal quarter ended April 3, 2021 Fiscal quarter ended April 4, 2020 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Net service cost $ - $ 1,190 $ - $ 1,074 Interest cost 254 754 342 924 Expected return on plan assets - (417 ) - (495 ) Amortization of prior service cost 36 51 36 30 Amortization of losses 447 1,884 298 1,592 Curtailment and settlement losses - 199 - 229 Net periodic benefit cost $ 737 $ 3,661 $ 676 $ 3,354
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost for Pension and Other Postretirement Benefit Plans	The following table shows the components of the net periodic benefit cost for the first fiscal quarters of 2021 and 2020 for the Company’s other postretirement benefit plans: Fiscal quarter ended April 3, 2021 Fiscal quarter ended April 4, 2020 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ 25 $ 71 $ 28 $ 69 Interest cost 41 11 59 15 Amortization of losses (gains) 13 29 7 31 Net periodic benefit cost $ 79 $ 111 $ 94 $ 115

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Apr. 03, 2021
Stock-Based Compensation [Abstract]
Summary of Recognized Stock-based Compensation Expense	The following table summarizes stock-based compensation expense recognized: Fiscal quarters ended April 3, 2021 April 4, 2020 Restricted stock units $ 3,911 $ 2,783 Phantom stock units 209 215 Total $ 4,120 $ 2,998
Summary of Unrecognized Compensation Cost and Weighted Average Remaining Amortization Periods	The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at April 3, 2021 (amortization periods in years) Unrecognized Compensation Cost Weighted Average Remaining Amortization Periods Restricted stock units $ 5,885 1.1 Phantom stock units - n/a Total $ 5,885
RSU Activity	RSU activity under the 2007 Program as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of RSUs in thousands) Number of RSUs Weighted Average Grant-date Fair Value per Unit Outstanding: January 1, 2021 793 $ 18.90 Granted 319 22.07 Vested* (235 ) 18.79 Cancelled or forfeited - - Outstanding at April 3, 2021 877 $ 20.08 Expected to vest at April 3, 2021 877 * The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements.
RSUs with Performance-Based Vesting Criteria	The number of performance-based RSUs that are scheduled to vest increases ratably based on the achievement of defined performance criteria between the established target and maximum levels. RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands) Vesting Date Expected to Vest Not Expected to Vest Total January 1, 2022 174 - 174 January 1, 2023 152 - 152 January 1, 2024 165 - 165
Phantom Stock Unit Activity Under the Phantom Stock Plan	Phantom stock unit activity under the phantom stock plan as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of phantom stock units in thousands) Number of units Grant-date Fair Value per Unit Outstanding: January 1, 2021 198 Granted 10 $ 20.89 Dividend equivalents issued 1 Outstanding at April 3, 2021 209

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Apr. 03, 2021
Segment Information [Abstract]
Segment Reporting Information by Segment	The following tables set forth business segment information: MOSFETs Diodes Optoelectronic Components Resistors Inductors Capacitors Corporate / Other* Total Fiscal quarter ended April 3, 2021 : Net revenues $ 153,223 $ 157,178 $ 77,771 $ 186,602 $ 83,458 $ 106,400 $ - $ 764,632 Gross profit $ 37,108 $ 34,416 $ 25,626 $ 53,973 $ 27,751 $ 24,075 $ - $ 202,949 Segment operating income $ 27,207 $ 28,821 $ 21,210 $ 47,376 $ 25,290 $ 18,863 $ - $ 168,767 Fiscal quarter ended April 4, 2020 : Net revenues $ 116,893 $ 115,343 $ 54,179 $ 159,208 $ 73,785 $ 93,433 $ - $ 612,841 Gross profit $ 28,152 $ 19,518 $ 14,585 $ 44,773 $ 22,987 $ 20,355 $ (3,130 ) $ 147,240 Segment operating income $ 18,658 $ 14,422 $ 10,686 $ 38,885 $ 20,310 $ 15,070 $ (3,130 ) $ 114,901 * Amounts reported in Corporate/Other above represent unallocated costs directly related to the COVID-19 pandemic, which are reported as costs of products sold on the consolidated condensed statement of operations.
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	Fiscal quarters ended April 3, 2021 April 4, 2020 Reconciliation: Segment Operating Income $ 168,767 $ 114,901 Impact of COVID-19 Pandemic on Selling, General, and Administrative Expenses - (317 ) Unallocated Selling, General, and Administrative Expenses (71,503 ) (67,176 ) Consolidated Operating Income $ 97,264 $ 47,408 Unallocated Other Income (Expense) (10,107 ) (11,274 ) Consolidated Income Before Taxes $ 87,157 $ 36,134
Disaggregation of Revenue	The Company has a broad line of products that it sells to OEMs, EMS companies, and independent distributors. The distribution of sales by customer type is shown below: Fiscal quarters ended April 3, 2021 April 4, 2020 Distributors $ 424,125 $ 305,446 OEMs 294,637 261,129 EMS companies 45,870 46,266 Total Revenue $ 764,632 $ 612,841 Net revenues were attributable to customers in the following regions: Fiscal quarters ended April 3, 2021 April 4, 2020 Asia $ 322,460 $ 217,084 Europe 268,323 233,052 Americas 173,849 162,705 Total Revenue $ 764,632 $ 612,841 The Company generates substantially all of its revenue from product sales to end customers in the industrial, automotive, telecommunications, computing, consumer products, power supplies, military and aerospace, and medical end markets. Sales by end market are presented below: Fiscal quarters ended April 3, 2021 April 4, 2020 Industrial $ 270,801 $ 215,111 Automotive 255,973 201,943 Telecommunications 24,902 29,692 Computing 59,899 45,223 Consumer Products 40,795 20,553 Power Supplies 35,246 25,194 Military and Aerospace 41,538 43,935 Medical 35,478 31,190 Total revenue $ 764,632 $ 612,841

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Apr. 03, 2021
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Share	The following table sets forth the computation of basic and diluted earnings per share attributable to Vishay stockholders (shares in thousands) Fiscal quarters ended April 3, 2021 April 4, 2020 Numerator: Net earnings attributable to Vishay stockholders $ 71,435 $ 27,219 Denominator: Denominator for basic earnings per share: Weighted average shares 144,760 144,599 Outstanding phantom stock units 208 193 Adjusted weighted average shares - basic 144,968 144,792 Effect of dilutive securities: Convertible debt instruments 9 95 Restricted stock units 486 408 Dilutive potential common shares 495 503 Denominator for diluted earnings per share: Adjusted weighted average shares - diluted 145,463 145,295 Basic earnings per share attributable to Vishay stockholders $ 0.49 $ 0.19 Diluted earnings per share attributable to Vishay stockholders $ 0.49 $ 0.19
Weighted Average Potential Common Shares that Would have an Antidilutive Effect or have Unsatisfied Performance Conditions	Diluted earnings per share for the periods presented do not reflect the following weighted average potential common shares that would have an antidilutive effect or have unsatisfied performance conditions (in thousands) Fiscal quarters ended April 3, 2021 April 4, 2020 Convertible debt instruments: Convertible senior notes due 2025 - 19,088 Convertible senior debentures due 2041 - 88 Weighted average other 317 325

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Apr. 03, 2021
Fair Value Measurements [Abstract]
Fair Value of Assets and Liabilities Carried at Fair Value Measured on Recurring Basis	The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis: Total Fair Value Level 1 Level 2 Level 3 April 3, 2021 Assets: Assets held in rabbi trusts $ 56,143 $ 31,352 $ 24,791 $ - Available for sale securities $ 4,641 4,641 - - $ 60,784 $ 35,993 $ 24,791 $ - December 31, 2020 Assets: Assets held in rabbi trusts $ 57,892 $ 34,145 23,747 $ - Available for sale securities $ 4,917 4,917 - - $ 62,809 $ 39,062 $ 23,747 $ -

Basis of Presentation (Details)

Basis of Presentation (Details) - USD ($) $ in Thousands	Apr. 03, 2021	Dec. 31, 2020	Apr. 04, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for adoption of ASU	$ 217,214	$ 138,990
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for adoption of ASU	$ (45,512)	20,566	$ (1,070)
Long-term Debt [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for adoption of ASU		59,246
Additional Paid-in Capital [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for adoption of ASU		$ (66,078)

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020	Dec. 31, 2020
Assets and Liabilities [Abstract]
Right of use assets	$ 98,001		$ 102,440
Current lease liabilities	21,275		22,074
Long-term lease liabilities	82,260		86,220
Total lease liabilities	103,535		108,294
Lease expense [Abstract]
Operating lease expense	6,152	$ 5,652
Short-term lease expense	325	194
Variable lease expense	127	23
Total lease expense	6,604	5,869
Cash paid for operating leases	$ 6,161	$ 5,609
Weighted-average remaining lease term - operating leases	8 years 8 months 12 days
Weighted-average discount rate - operating leases	5.90%
Undiscounted future lease payments for operating lease liabilities [Abstract]
2021	$ 16,736
2022	19,360
2023	16,198
2024	14,165
2025	13,026
Thereafter	54,010
Building and Improvements [Member]
Assets and Liabilities [Abstract]
Right of use assets	92,951		97,429
Current lease liabilities	18,622		19,370
Long-term lease liabilities	79,895		83,926
Machinery and Equipment [Member]
Assets and Liabilities [Abstract]
Right of use assets	5,050		5,011
Current lease liabilities	2,653		2,704
Long-term lease liabilities	$ 2,365		$ 2,294

Restructuring and Related Act_3

Restructuring and Related Activities (Details) - 2019 Global Cost Reduction and Management Rejuvenation Programs [Member] - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 03, 2021	Dec. 31, 2019	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, current	$ 3,479
Restructuring reserve, noncurrent	1,435
Restructuring Reserve [Roll Forward]
Restructuring and severance costs		$ 24,139	$ 743
Cash paid	(8,447)	(1,330)	(10,813)
Foreign currency translation	(96)	35	683
Balance at end of period	4,914	$ 22,844	$ 13,457
Expected restructuring costs	$ 24,882

Income Taxes (Details)

Income Taxes (Details) $ in Thousands	3 Months Ended
	Apr. 03, 2021USD ($)
Income Taxes [Abstract]
Decrease in liabilities for unrecognized tax benefits	$ 1,485
Adoption of New Accounting Standard [Member]
Effect on Income Tax Expense (Benefit) [Line Items]
Deferred other tax expense (benefit)	12,127
Change in Tax Regulation [Member]
Effect on Income Tax Expense (Benefit) [Line Items]
Deferred other tax expense (benefit)	$ (4,395)

Long-Term Debt (Details)

Long-Term Debt (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 03, 2021USD ($)$ / shares	Apr. 04, 2020USD ($)	Dec. 31, 2020USD ($)
Debt Instruments [Abstract]
Credit facility	$ 0		$ 0
Deferred financing costs	(12,131)		(11,512)
Long-term debt	453,213		394,886
Less current portion	0		0
Long-term debt, less current portion	453,213		394,886
Interest expense [Abstract]
Contractual coupon interest		$ 3,419
Non-cash amortization of debt discount	0	3,637
Other non-cash interest expense (income)		454
Total interest expense related to the debentures		7,510
Purchase price of extinguished debt	300	19,849
Loss on extinguishment of debt, including the write-off of portion of unamortized debt issuance costs	0	(2,920)
Convertible Senior Notes, Due 2025 [Member]
Debt Instruments [Abstract]
Convertible debt	$ 465,344		406,268
Issuance date	Jun. 12, 2018
Debt maturity date	Jun. 15, 2025
Cash coupon rate	2.25%
Nonconvertible debt borrowing rate at issuance	5.50%
Effective conversion rate	31.8965
Effective conversion price (in dollars per share) | $ / shares	$ 31.35
130% of the conversion price (in dollars per share) | $ / shares	$ 40.76
Debt instrument percentage of conversion price	130.00%
Debt instrument percentage of sales price of common stock	98.00%
Maximum threshold of quarterly cash dividends per share of common stock for not adjusting conversion rate of convertible notes | $ / shares	$ 0.085
Liability and equity components of convertible debentures [Abstract]
Principal amount of debt	$ 465,344
Interest expense [Abstract]
Contractual coupon interest	2,618	3,375
Non-cash amortization of debt discount	0	3,617
Other non-cash interest expense (income)	433	454
Total interest expense related to the debentures	3,051	7,446
Convertible Senior Debentures, Due 2040 [Member]
Debt Instruments [Abstract]
Convertible debt	$ 0		130
Convertible Senior Debentures [Member]
Interest expense [Abstract]
Contractual coupon interest		44
Non-cash amortization of debt discount		20
Other non-cash interest expense (income)		0
Total interest expense related to the debentures		$ 64
Convertible Debt [Member]
Liability and equity components of convertible debentures [Abstract]
Principal amount of debt			465,644
Unamortized discount			(59,246)
Carrying value of liability component			406,398
Equity component - net carrying value			66,248
Convertible Debt [Member] | Convertible Senior Notes, Due 2025 [Member]
Liability and equity components of convertible debentures [Abstract]
Principal amount of debt			465,344
Unamortized discount			(59,076)
Carrying value of liability component			406,268
Equity component - net carrying value			66,127
Convertible Debt [Member] | Convertible Senior Debentures, Due 2040 [Member]
Liability and equity components of convertible debentures [Abstract]
Principal amount of debt			300
Unamortized discount			(170)
Carrying value of liability component			130
Equity component - net carrying value			$ 121

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Sales returns and allowances accrual activity [Roll Forward]
Beginning balance	$ 39,629	$ 40,508
Sales allowances	23,796	22,632
Credits issued	(28,446)	(27,982)
Foreign currency	(530)	(346)
Ending balance	$ 34,449	$ 34,812

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	$ 13,559
Other comprehensive income before reclassifications	(26,949)
Tax effect	0
Other comprehensive income before reclassifications, net of tax	(26,949)
Amounts reclassified out of AOCI	2,659
Tax effect	(795)
Amounts reclassified out of AOCI, net of tax	1,864
Net other comprehensive income	(25,085)	$ (21,528)
Ending Balance	(11,526)
Pension and Other Post-Retirement Actuarial Items [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	(77,075)
Other comprehensive income before reclassifications	0
Tax effect	0
Other comprehensive income before reclassifications, net of tax	0
Amounts reclassified out of AOCI	2,659
Tax effect	(795)
Amounts reclassified out of AOCI, net of tax	1,864
Net other comprehensive income	1,864
Ending Balance	(75,211)
Currency Translation Adjustment [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	90,634
Other comprehensive income before reclassifications	(26,949)
Tax effect	0
Other comprehensive income before reclassifications, net of tax	(26,949)
Amounts reclassified out of AOCI	0
Tax effect	0
Amounts reclassified out of AOCI, net of tax	0
Net other comprehensive income	(26,949)
Ending Balance	63,685
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	13,559
Net other comprehensive income	(25,085)	$ (21,528)
Ending Balance	$ (11,526)

Pensions and Other Postretire_3

Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Defined Benefit Pension Plans [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	$ 0	$ 0
Interest cost	254	342
Expected return on plan assets	0	0
Amortization of prior service cost (credit)	36	36
Amortization of losses (gains)	447	298
Curtailment and settlement losses	0	0
Net periodic benefit cost	737	676
Defined Benefit Pension Plans [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	1,190	1,074
Interest cost	754	924
Expected return on plan assets	(417)	(495)
Amortization of prior service cost (credit)	51	30
Amortization of losses (gains)	1,884	1,592
Curtailment and settlement losses	199	229
Net periodic benefit cost	3,661	3,354
Other Postretirement Benefits [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	25	28
Interest cost	41	59
Amortization of losses (gains)	13	7
Net periodic benefit cost	79	94
Other Postretirement Benefits [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	71	69
Interest cost	11	15
Amortization of losses (gains)	29	31
Net periodic benefit cost	$ 111	$ 115

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Apr. 03, 2021	Apr. 04, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense recognized		$ 4,120	$ 2,998
Unrecognized Compensation Cost		5,885
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense recognized		3,911	2,783
Unrecognized Compensation Cost		$ 5,885
Weighted Average Remaining Amortization Periods		1 year 1 month 6 days
Number of units [Abstract]
Outstanding (in shares)		793
Granted (in shares)		319
Vested (in shares)	[1]	(235)
Cancelled or forfeited (in shares)		0
Outstanding (in shares)		877
Expected to vest (in shares)		877
Weighted Average Grant-date Fair Value per Unit [Abstract]
Outstanding (in dollars per share)		$ 18.90
Granted (in dollars per share)		22.07
Vested (in dollars per share)	[1]	18.79
Cancelled or forfeited (in dollars per share)		0
Outstanding (in dollars per share)		$ 20.08
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense recognized		$ 209	$ 215
Unrecognized Compensation Cost		$ 0
Number of units [Abstract]
Outstanding (in shares)		198
Granted (in shares)		10
Dividend equivalents issued (in shares)		1
Outstanding (in shares)		209
Weighted Average Grant-date Fair Value per Unit [Abstract]
Granted (in dollars per share)		$ 20.89
Scheduled to Vest January 1, 2022 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		174
Expected to vest (in shares)		174
Not expected to vest (in shares)		0
Scheduled to Vest January 1, 2023 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		152
Expected to vest (in shares)		152
Not expected to vest (in shares)		0
Scheduled to Vest January 1, 2024 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		165
Expected to vest (in shares)		165
Not expected to vest (in shares)		0
[1]	The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Segment Reporting Information [Line Items]
Net revenues	$ 764,632	$ 612,841
Gross profit	202,949	147,240
Unallocated Selling, General, and Administrative Expenses	(105,685)	(99,832)
Operating income	97,264	47,408
Unallocated Other Income (Expense)	(10,107)	(11,274)
Consolidated Income Before Taxes	87,157	36,134
Distributors [Member]
Segment Reporting Information [Line Items]
Net revenues	424,125	305,446
OEMs [Member]
Segment Reporting Information [Line Items]
Net revenues	294,637	261,129
EMS Companies [Member]
Segment Reporting Information [Line Items]
Net revenues	45,870	46,266
Industrial [Member]
Segment Reporting Information [Line Items]
Net revenues	270,801	215,111
Automotive [Member]
Segment Reporting Information [Line Items]
Net revenues	255,973	201,943
Telecommunications [Member]
Segment Reporting Information [Line Items]
Net revenues	24,902	29,692
Computing [Member]
Segment Reporting Information [Line Items]
Net revenues	59,899	45,223
Consumer Products [Member]
Segment Reporting Information [Line Items]
Net revenues	40,795	20,553
Power Supplies [Member]
Segment Reporting Information [Line Items]
Net revenues	35,246	25,194
Military and Aerospace [Member]
Segment Reporting Information [Line Items]
Net revenues	41,538	43,935
Medical [Member]
Segment Reporting Information [Line Items]
Net revenues	35,478	31,190
Asia [Member]
Segment Reporting Information [Line Items]
Net revenues	322,460	217,084
Europe [Member]
Segment Reporting Information [Line Items]
Net revenues	268,323	233,052
Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	173,849	162,705
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	168,767	114,901
Operating Segments [Member] | MOSFETS [Member]
Segment Reporting Information [Line Items]
Net revenues	153,223	116,893
Gross profit	37,108	28,152
Operating income	27,207	18,658
Operating Segments [Member] | Diodes [Member]
Segment Reporting Information [Line Items]
Net revenues	157,178	115,343
Gross profit	34,416	19,518
Operating income	28,821	14,422
Operating Segments [Member] | Optoelectronic Components [Member]
Segment Reporting Information [Line Items]
Net revenues	77,771	54,179
Gross profit	25,626	14,585
Operating income	21,210	10,686
Operating Segments [Member] | Resistors [Member]
Segment Reporting Information [Line Items]
Net revenues	186,602	159,208
Gross profit	53,973	44,773
Operating income	47,376	38,885
Operating Segments [Member] | Inductors [Member]
Segment Reporting Information [Line Items]
Net revenues	83,458	73,785
Gross profit	27,751	22,987
Operating income	25,290	20,310
Operating Segments [Member] | Capacitors [Member]
Segment Reporting Information [Line Items]
Net revenues	106,400	93,433
Gross profit	24,075	20,355
Operating income	18,863	15,070
Operating Segments [Member] | Corporate Other [Member]
Segment Reporting Information [Line Items]
Net revenues	0	0
Gross profit	0	(3,130)
Operating income	0	(3,130)
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Impact of COVID-19 Pandemic on Selling, General, and Administrative Expenses	0	(317)
Unallocated Selling, General, and Administrative Expenses	(71,503)	(67,176)
Unallocated Other Income (Expense)	$ (10,107)	$ (11,274)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Numerator [Abstract]
Net earnings attributable to Vishay stockholders	$ 71,435	$ 27,219
Denominator [Abstract]
Weighted average shares (in shares)	144,760	144,599
Outstanding phantom stock units (in shares)	208	193
Adjusted weighted average shares - basic (in shares)	144,968	144,792
Effect of dilutive securities [Abstract]
Convertible and exchangeable debt instruments (in shares)	9	95
Restricted stock units (in shares)	486	408
Dilutive potential common shares (in shares)	495	503
Denominator for diluted earnings per share [Abstract]
Adjusted weighted average shares - diluted (in shares)	145,463	145,295
Basic earnings per share attributable to Vishay stockholders (in dollars per share)	$ 0.49	$ 0.19
Diluted earnings per share attributable to Vishay stockholders (in dollars per share)	$ 0.49	$ 0.19
Convertible Senior Notes, Due 2025 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	19,088
Convertible Senior Debentures, Due 2041 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	88
Weighted Average Other [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	317	325

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 03, 2021	Dec. 31, 2020
Assets [Abstract]
Held-to-maturity Securities Transferred	$ 0	$ 0
Held-to-maturity Securities, Unrecognized Holding Gain	0	0
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	0	0
Held-to-maturity Securities, Unrecognized Holding Loss	0	0
Liabilities [Abstract]
Long-term debt, fair value	517,700	491,400
Carrying value of long-term debt, excluding derivative liabilities	465,344	406,398
Derivative, Notional Amount	100,000	100,000
Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Assets held in rabbi trusts	56,143	57,892
Available for sale securities	4,641	4,917
Fair value assets	60,784	62,809
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Assets held in rabbi trusts	31,352	34,145
Available for sale securities	4,641	4,917
Fair value assets	35,993	39,062
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Assets held in rabbi trusts	24,791	23,747
Available for sale securities	0	0
Fair value assets	24,791	23,747
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Assets held in rabbi trusts	0	0
Available for sale securities	0	0
Fair value assets	$ 0	$ 0