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Document and Entity Informations - shares	3 Months Ended
Document and Entity Informations - shares	Apr. 02, 2011	Apr. 29, 2011
Statement [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 02, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q1
Trading Symbol	vsh
Entity Registrant Name	VISHAY INTERTECHNOLOGY INC
Entity Central Index Key	0000103730
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		152,043,447

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Apr. 02, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 668,551	$ 897,338
Short-term investments	339,449	0
Accounts receivable, net	339,263	330,556
Inventories:
Finished goods	118,264	109,762
Work in process	190,859	178,844
Raw materials	151,264	139,216
Total inventories	460,387	427,822
Deferred income taxes	33,341	31,903
Prepaid expenses and other current assets	114,951	106,885
Total current assets	1,955,942	1,794,504
Property and equipment, at cost:
Land	94,600	93,020
Buildings and improvements	496,500	477,518
Machinery and equipment	2,085,332	2,025,793
Construction in progress	62,276	75,051
Allowance for depreciation	(1,826,000)	(1,759,268)
Property, Plant and Equipment, Net, Total	912,708	912,114
Intangible assets, net	110,551	113,830
Other assets	139,310	145,645
Total assets	3,118,511	2,966,093
Liabilities and equity
Notes payable to banks	511	23
Trade accounts payable	166,746	167,795
Payroll and related expenses	113,072	122,234
Other accrued expenses	183,568	186,049
Income taxes	73,883	51,060
Total current liabilities	537,780	527,161
Long-term debt less current portion	431,997	431,682
Deferred income taxes	82,171	82,043
Deferred grant income	2,607	2,788
Other liabilities	136,968	134,152
Accrued pension and other postretirement costs	297,955	291,117
Total liabilities	1,489,478	1,468,943
Stockholders' equity:
Common stock	15,197	15,061
Capital in excess of par value	2,165,438	2,156,981
(Accumulated deficit) retained earnings	(666,950)	(742,237)
Accumulated other comprehensive income (loss)	108,764	60,491
Total Vishay stockholders' equity	1,623,794	1,491,731
Noncontrolling interests	5,239	5,419
Total equity	1,629,033	1,497,150
Total liabilities and equity	3,118,511	2,966,093
Class B Convertible Common
Stockholders' equity:
Common stock	$ 1,345	$ 1,435

Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2011	Apr. 03, 2010
Statement [Line Items]
Net revenues	$ 695,151	$ 640,460
Costs of products sold	480,488	473,447
Gross profit	214,663	167,013
Selling, general, and administrative expenses	92,465	101,888
Operating income	122,198	65,125
Other income (expense):
Interest expense	(4,054)	(2,434)
Other	(507)	44
Nonoperating Income (Expense), Total	(4,561)	(2,390)
Income before taxes	117,637	62,735
Income tax expense	42,030	17,096
Net earnings	75,607	45,639
Less: net earnings attributable to noncontrolling interests	320	219
Net earnings attributable to Vishay stockholders	$ 75,287	$ 45,420
Basic earnings per share attributable to Vishay stockholders	$ 0.46	$ 0.24
Diluted earnings per share attributable to Vishay stockholders	$ 0.43	$ 0.24
Weighted average shares outstanding - basic	165,186	186,641
Weighted average shares outstanding - diluted	175,661	193,067

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2011	Apr. 03, 2010
Continuing operating activities
Net earnings	$ 75,607	$ 45,639
Adjustments to reconcile net earnings (loss) to net cash provided by continuing operating activities:
Depreciation and amortization	45,401	50,445
(Gain) loss on disposal of property and equipment	(959)	(68)
Accretion of interest on convertible debentures	376	0
Inventory write-offs for obsolescence	5,237	6,005
Deferred grant income	(147)	(156)
Other	25,222	5,186
Net change in operating assets and liabilities, net of effects of businesses acquired or spun-off	(52,980)	(39,003)
Net cash provided by continuing operating activities	97,757	68,048
Continuing investing activities
Capital expenditures	(18,600)	(18,086)
Proceeds from sale of property and equipment	1,194	292
Purchase of short-term investments	(339,449)	0
Other investing activities	(6)	0
Net cash used in continuing investing activities	(356,861)	(17,794)
Continuing financing activities
Principal payments on long-term debt and capital leases	0	(1,614)
Net changes in short-term borrowings	489	9
Proceeds from stock options exercised	6,793	0
Excess tax benefit from stock options exercised	302	0
Distributions to noncontrolling interests	(500)	(516)
Net cash provided by (used in) continuing financing activities	7,084	(2,121)
Effect of exchange rate changes on cash and cash equivalents	23,233	(14,138)
Net (decrease) increase in cash and cash equivalents from continuing activities	(228,787)	33,995
Net cash used in discontinued operating activities	0	(82)
Net cash used in discontinued investing activities	0	0
Net cash used in discontinued financing activities	0	0
Net cash used in discontinued operations	0	(82)
Net (decrease) increase in cash and cash equivalents	(228,787)	33,913
Cash and cash equivalents at beginning of period	897,338	579,189
Cash and cash equivalents at end of period	$ 668,551	$ 613,102

Consolidated Condensed Statement of Equity $ in Thousands	3 Months Ended
Consolidated Condensed Statement of Equity $ in Thousands	Apr. 02, 2011 USD ($)
Statement [Line Items]
Balance	$ 1,497,150
Net earnings	75,607
Other comprehensive income	48,273
Comprehensive income	123,880
Distributions to noncontrolling interests	(500)
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	1,408
Stock options exercised (452,628 shares)	6,793
Tax effects of stock plan	302
Conversions from Class B to common stock (900,290 shares)	0
Balance	1,629,033
Common Stock
Statement [Line Items]
Balance	15,061
Net earnings	0
Other comprehensive income	0
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	1
Stock compensation expense	0
Stock options exercised (452,628 shares)	45
Tax effects of stock plan	0
Conversions from Class B to common stock (900,290 shares)	90
Balance	15,197
Class B Convertible Common Stock
Statement [Line Items]
Balance	1,435
Net earnings	0
Other comprehensive income	0
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	0
Stock options exercised (452,628 shares)	0
Tax effects of stock plan	0
Conversions from Class B to common stock (900,290 shares)	(90)
Balance	1,345
Capital in Excess of Par Value
Statement [Line Items]
Balance	2,156,981
Net earnings	0
Other comprehensive income	0
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	(1)
Stock compensation expense	1,408
Stock options exercised (452,628 shares)	6,748
Tax effects of stock plan	302
Conversions from Class B to common stock (900,290 shares)	0
Balance	2,165,438
Retained Earnings (Accumulated Deficit)
Statement [Line Items]
Balance	(742,237)
Net earnings	75,287
Other comprehensive income	0
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	0
Stock options exercised (452,628 shares)	0
Tax effects of stock plan	0
Conversions from Class B to common stock (900,290 shares)	0
Balance	(666,950)
Accumulated Other Comprehensive Income (Loss)
Statement [Line Items]
Balance	60,491
Net earnings	0
Other comprehensive income	48,273
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	0
Stock options exercised (452,628 shares)	0
Tax effects of stock plan	0
Conversions from Class B to common stock (900,290 shares)	0
Balance	108,764
Total Vishay Stockholders' Equity
Statement [Line Items]
Balance	1,491,731
Net earnings	75,287
Other comprehensive income	48,273
Comprehensive income	123,560
Distributions to noncontrolling interests	0
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	1,408
Stock options exercised (452,628 shares)	6,793
Tax effects of stock plan	302
Conversions from Class B to common stock (900,290 shares)	0
Balance	1,623,794
Noncontrolling Interests
Statement [Line Items]
Balance	5,419
Net earnings	320
Other comprehensive income	0
Comprehensive income	320
Distributions to noncontrolling interests	(500)
Phantom and restricted stock issuances (5,000 shares)	0
Stock compensation expense	0
Stock options exercised (452,628 shares)	0
Tax effects of stock plan	0
Conversions from Class B to common stock (900,290 shares)	0
Balance	$ 5,239

Basis of Presentation	3 Months Ended
Basis of Presentation	Apr. 02, 2011
Basis Of Presentation [Abstract]
Basis Of Presentation Disclosure [Text Block]	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, 2010. The results of operations for the three fiscal months ended April 2, 2011 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 2011 end on April 2, 2011, July 2, 2011, October 1, 2011, and December 31, 2011. The four fiscal quarters in 2010 ended on April 3, 2010, July 3, 2010, October 2, 2010, and December 31, 2010, respectively. On July 6, 2010, Vishay completed the spin-off of Vishay Precision Group, Inc. (“VPG”) through a tax-free stock dividend to Vishay’s stockholders. Until July 6, 2010, VPG was part of Vishay and its results of operations and cash flows are included in the balances reported in these consolidated condensed financial statements for periods prior to the completion of the spin-off. In preparation for the spin-off of VPG, the Company realigned its reportable business segments structure in the second fiscal quarter of 2010 to be consistent with changes made to its management reporting. Segment results for the fiscal quarter ended April 3, 2010 have been adjusted to reflect the new segment reporting structure. Refer to Note 8 for a description of the new segment reporting structure. Recently Adopted Accounting Guidance In January 2010, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to fair value measurements disclosures. The updated guidance (i) requires separate disclosure of significant transfers in and out of Levels 1 and 2 fair value measurements, (ii) requires disclosure of Level 3 fair value measurements activity on a gross basis, (iii) clarifies existing disaggregation requirements, (iv) and clarifies existing input and valuation technique disclosure requirements. The updated guidance was effective for the Company for interim and annual periods beginning after January 1, 2010, except for the Level 3 fair value measurement disclosure requirements, which are effective for fiscal years beginning after January 1, 2011. Vishay adopted the then-effective aspects of the guidance on January 1, 2010 and adopted the remaining guidance on January 1, 2011. The adoption of the guidance had no effect on the Company’s financial position, results of operations, or liquidity. Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation.

Acquisition and Divestiture Activities	3 Months Ended
Acquisition and Divestiture Activities	Apr. 02, 2011
Acquisition and Divestiture Activities [Abstract]
Acquisition and Divestiture Activities [Text Block]	Note 2 – Acquisition and Divestiture Activities As part of its growth strategy, the Company seeks to expand through targeted acquisitions of other manufacturers of electronic components that have established positions in major markets, reputations for product quality and reliability, and product lines with which the Company has substantial marketing and technical expertise. Spin-off of Vishay Precision Group, Inc. On October 27, 2009, Vishay announced that it intended to spin off its measurements and foil resistors businesses into an independent, publicly-traded company to be named Vishay Precision Group, Inc. On June 15, 2010, the Board of Directors of Vishay approved the spin-off of VPG and on July 6, 2010, Vishay completed the spin-off through a tax-free stock dividend to Vishay’s stockholders. Vishay’s common stockholders received 1 share of VPG common stock for every 14 shares of Vishay common stock they held on the record date, June 25, 2010, and Vishay’s Class B common stockholders received 1 share of VPG Class B common stock for every 14 shares of Vishay Class B common stock they held on the record date. Until July 6, 2010, VPG was part of Vishay and its results of operations and cash flows are included in the amounts reported in these consolidated condensed financial statements for periods prior to the completion of the spin-off. The product lines that comprise VPG are included in the VPG reporting segment. See Note 8 for further information on the effect that VPG had on Vishay’s consolidated results. Relationship with VPG after Spin-off Following the spin-off, VPG is an independent company and Vishay retains no ownership interest. However, two members of the VPG board of directors also serve on Vishay’s board of directors. In connection with the completion of the spin-off, on July 6, 2010, Vishay and its subsidiaries entered into several agreements with VPG and its subsidiaries that govern the relationship of the parties following the spin-off. Among the agreements entered into with VPG and its subsidiaries were a transition services agreement, several lease agreements, and supply agreements. None of the agreements are expected to have a material impact on Vishay’s financial position, results of operations, or liquidity. Vishay also entered into a trademark license agreement with VPG pursuant to which Vishay granted VPG the license to use certain trademarks, service marks, logos, trade names, entity names, and domain names which include the term “Vishay.” The license granted VPG the limited, exclusive, royalty-free right and license to use certain marks and names incorporating the term “Vishay” in connection with the design, development, manufacture, marketing, provision and performance of certain VPG products that do not compete with any products within Vishay’s product range as constituted immediately following the separation and certain services provided in connection with the products. The license cannot be terminated except as a result of willful misconduct or liquidation bankruptcy of VPG. As a result of this continuing involvement, Vishay did not restate prior periods to present VPG as a discontinued operation.

Long-Term Debt

3 Months Ended

Apr. 02, 2011

Vsh Long Term Debt [Abstract]

Debt Disclosure [Text Block]

Note 4 – Long-Term Debt

Long-term debt consists of the following (in thousands):

	April 2,		December 31,
	2011		2010
Credit facility	$	240,000	$	240,000
Exchangeable unsecured notes, due 2102		95,042		95,042
Convertible senior debentures, due 2040		96,955		96,640
		431,997		431,682
Less current portion		-		-
	$	431,997	$	431,682

Convertible Senior Debentures, due 2040

On November 9, 2010, Vishay issued $275 million principal amount of 2.25% convertible senior debentures due 2040 to qualified institutional investors. GAAP requires an issuer to separately account for the liability and equity components of a convertible debt instrument in a manner that reflects the issuer’s nonconvertible debt borrowing rate when interest costs are recognized in subsequent periods. The resulting discount on the debt is amortized as non-cash interest expense in future periods.

The carrying values of the liability and equity components of the convertible debentures are reflected in the Company’s consolidated condensed balance sheets as follows (in thousands):

	April 2,			December 31,
	2011			2010
Liability component:
Principal amount of the debentures	$	275,000		$	275,000
Unamortized discount		(178,303	)		(178,679	)
Embedded derivative		258			319
Carrying value of liability component	$	96,955		$	96,640

Equity component - net carrying value	$	110,094		$	110,094

Interest is payable on the debentures semi-annually at a rate of 2.25% per annum; however, the remaining debt discount is being amortized as additional non-cash interest expense using an effective annual interest rate of 8.00% based on the Company’s estimated nonconvertible debt borrowing rate at the time of issuance. In addition to ordinary interest, beginning on November 15, 2020, contingent interest will accrue in certain circumstances relating to the trading price of the debentures and under certain other circumstances.

Interest expense related to the debentures is reflected on the consolidated condensed statement of operations as follows (in thousands):

	Fiscal quarter ended
	April 2, 2011
Contractual coupon interest	$	1,547
Non-cash amortization of debt discount		376
Non-cash amortization of deferred financing costs		22
Non-cash change in value of derivative liability		(61	)
Total interest expense related to the debentures	$	1,884

Stock-Based Compensation

3 Months Ended

Apr. 02, 2011

Stock-Based Compensation [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Note 7 – 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.

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 fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model. The Company determines compensation cost for restricted stock units (“RSUs”), phantom stock units, and restricted stock based on the grant-date fair value of the underlying common stock. 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 (in thousands):

	Fiscal quarters ended
	April 2, 2011		April 3, 2010
Stock options	$	120	$	193
Restricted stock units		1,066		220
Phantom stock units		222		175
Total	$	1,408	$	588

The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at April 2, 2011 (dollars in thousands, amortization periods in years):

			Weighted Average
	Unrecognized		Remaining
	Compensation		Amortization
	Cost		Periods
Stock options	$	507	1.7
Restricted stock units		9,731	2.1
Phantom stock units		-	0.0
Total	$	10,238

2007 Stock Incentive Plan

The Company’s 2007 Stock Incentive Program (the “2007 Program”) permits the grant of up to 3,000,000 shares of restricted stock, unrestricted stock, RSUs, and stock options, to officers, employees, and non-employee directors. Such instruments are available for grant until May 22, 2017.

The 2007 Program was originally approved by stockholders of the Company on May 22, 2007, as the “2007 Stock Option Program.” On May 28, 2008, the Company’s stockholders approved amendments to the 2007 Stock Option Program, which was then renamed the “2007 Stock Incentive Program.”

On February 23, 2011, the Board of Directors of the Company amended and restated the 2007 Program. The amendment eliminated share recycling, so that on the exercise of an option where the exercise price is paid via the tender of previously-owned shares or pursuant to an “immaculate cashless exercise,” the total “gross” number of option shares exercised is removed from the pool of shares available for future issuance. Similarly, shares withheld to pay income taxes in connection with the exercise of an option are also removed from the pool. The amendment also restricts re-pricing and cash repurchases of options without the prior approval of stockholders.

Stock Options

In addition to stock options outstanding pursuant to the 2007 Program, the Company has stock options outstanding under previous stockholder-approved stock option programs. These programs are more fully described in Note 12 to the Company’s consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2010. No additional options may be granted pursuant to these programs.

Option activity under the stock option plans as of April 2, 2011 and changes during the three fiscal months then ended are presented below (number of options in thousands, contractual life in years):

					Weighted
			Weighted		Average
	Number		Average		Remaining
	of		Exercise		Contractual
	Options		Price		Life
Outstanding:
January 1, 2011	1,254		$	15.04
Granted	-			-
Exercised	(453	)		14.88
Cancelled or forfeited	(34	)		14.74
Outstanding at April 2, 2011	767		$	15.15	3.25

Vested and expected to vest
at April 2, 2011	767		$	15.15	3.25
Exercisable at April 2, 2011	519		$	15.13	1.84

During the three fiscal months ended April 2, 2011, 5,000 options vested. At April 2, 2011, there are 248,000 unvested options outstanding, with a weighted average grant-date fair value of $9.37 per option.

The pretax aggregate intrinsic value (the difference between the closing stock price on the last trading day of the first fiscal quarter of 2011 of $18.08 per share and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on April 2, 2011 is $2,249,000. This amount changes based on changes in the market value of the Company’s common stock. During the three fiscal months ended April 2, 2011, 453,000 options were exercised. The total intrinsic value of options exercised during the three fiscal months ended April 2, 2011 was approximately $1,337,000.

Restricted Stock Units

RSU activity under the 2007 Program as of April 2, 2011 and changes during the three fiscal months then ended are presented below (number of RSUs in thousands):

		Weighted Average
	Number	grant date
	of	fair value
	RSUs	per unit
Outstanding:
January 1, 2011	634	$	9.61
Granted	392		16.93
Vested	-		-
Cancelled or forfeited	-		-
Outstanding at April 2, 2011	1,026	$	12.41

Expected to vest at April 2, 2011	1,026

The Company recognizes compensation cost for RSUs that are expected to vest. The Company expects all performance-based vesting criteria to be achieved. RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands):

Vesting Date		Number of RSUs
January 1, 2013		324
January 1, 2014		215

Phantom Stock Plan

The Company maintains a phantom stock plan for certain senior executives. The Phantom Stock Plan authorizes the grant of up to 300,000 phantom stock units to the extent provided for in employment agreements with the Company. Following the completion of the spin-off of VPG in 2010, the Company has such employment arrangements with three of its executives. The arrangements provide for an annual grant of 5,000 shares of phantom stock to each of these executives on the first trading day of the year. If the Company later enters into other employment arrangements with other individuals that provide for the granting of phantom stock, those individuals also will be eligible for grants under the Phantom Stock Plan. No grants may be made under the Phantom Stock Plan other than under the terms of employment arrangements with the Company. Each phantom stock unit entitles the recipient to receive a share of common stock at the individual’s termination of employment or any other future date specified in the employment agreement. The phantom stock units are fully vested at all times.

Phantom stock units activity under the 2007 Program as of April 2, 2011 and changes during the three fiscal months then ended are presented below (number of phantom stock units in thousands):

	Number	Grant date
	of	fair value
	Units	per unit
Outstanding:
January 1, 2011	116
Granted	15	$	14.78
Redeemed for common stock	-
Outstanding at April 2, 2011	131

Segment Information

3 Months Ended

Apr. 02, 2011

Segment Information [Abstract]

Segment Reporting Disclosure [Text Block]

Note 8 – Segment Information

In preparation for the spin-off of VPG, which was completed on July 6, 2010, the Company realigned its reportable business segments structure in the second fiscal quarter of 2010 to be consistent with changes made to its management reporting. The changes made to management reporting included separating the former Semiconductors reporting segment into MOSFETs, Diodes, and Optoelectronic Components and separating the former Passive Components reporting segment into Resistors & Inductors, Capacitors, and Vishay Precision Group. The changes were necessary due to the former Passive Components segment no longer being comparable after the completion of the spin-off of VPG, the need for discrete information regarding VPG, and the increased interest of management and outside investors in more discrete financial information. Effective beginning in the second fiscal quarter of 2010, the chief operating decision maker began making strategic and operating decisions with regards to assessing performance and allocating resources based on this new segment structure. Following the completion of the spin-off in the third fiscal quarter of 2010, the Company has five reporting segments.

The Company evaluates business segment performance on operating income, exclusive of certain items (“segment operating income”). Beginning in the second fiscal quarter of 2010, the Company changed its definition of segment operating income to exclude such costs as global operations, sales and marketing, information systems, finance and administration groups. These costs are managed by executives that report to the chief operating decision maker and were formerly included in segment operating income. Only dedicated, direct selling, general, and administrative expenses of the segments are included in the calculation of segment operating income. Additionally, management has always evaluated segment performance excluding items such as restructuring and severance costs, asset write-downs, goodwill and indefinite-lived intangible asset impairments, inventory write-downs, gains or losses on purchase commitments, and other items. Management believes that evaluating segment performance excluding such items is meaningful because it provides insight with respect to intrinsic operating results of the Company. These items represent reconciling items between segment operating income and consolidated operating income. Business segment assets are the owned or allocated assets used by each business.

Until July 6, 2010, VPG was part of Vishay and its results of operations and cash flows are included in the amounts reported in these consolidated condensed financial statements for the three fiscal months ended April 3, 2010. Excluding the non-recurring costs of the spin-off incurred by Vishay, VPG contributed $3,630,000 of income before taxes, $1,776,000 of net earnings attributable to Vishay stockholders, and $0.01 per diluted share attributable to Vishay stockholders to Vishay’s results for the three fiscal months ended April 3, 2010.

Results for the fiscal quarter ended April 3, 2010 have been adjusted to reflect the new reporting segment structure. The following table sets forth business segment information (in thousands):

													Unallocated Selling,
													General, and
					Optoelectronic		Resistors &				Vishay Precision		Administrative
	MOSFETs		Diodes		Components		Inductors		Capacitors		Group		Expenses			Total
Fiscal quarter ended April 2, 2011:
Product Sales	$	142,901	$	159,417	$	57,706	$	171,919	$	161,852	$	-	$	-		$	693,795
Royalty Revenues		97		-		42		1,217		-		-		-		$	1,356
Total Revenue	$	142,998	$	159,417	$	57,748	$	173,136	$	161,852	$	-	$	-		$	695,151
Gross Margin	$	39,439	$	39,140	$	19,948	$	61,158	$	54,978	$	-	$	-		$	214,663
Operating Income	$	29,410	$	32,800	$	16,357	$	54,104	$	48,333	$	-	$	(58,806	)	$	122,198

Fiscal quarter ended April 3, 2010:
Product Sales	$	127,624	$	140,246	$	58,396	$	147,457	$	117,331	$	48,175	$	-		$	639,229
Royalty Revenues		-		-		33		1,198		-		-		-		$	1,231
Total Revenue	$	127,624	$	140,246	$	58,429	$	148,655	$	117,331	$	48,175	$	-		$	640,460
Gross Margin	$	27,018	$	27,646	$	19,656	$	51,920	$	23,725	$	17,048	$	-		$	167,013
Operating Income	$	18,290	$	21,835	$	16,661	$	45,240	$	17,762	$	8,078	$	(62,741	)	$	65,125

Earnings Per Share

3 Months Ended

Apr. 02, 2011

Vsh Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 9 – Earnings Per Share

The following table sets forth the computation of basic and diluted earnings (loss) per share attributable to Vishay stockholders (in thousands, except per share amounts):

	Fiscal quarters ended
	April 2, 2011		April 3, 2010
Numerator:
Numerator for basic earnings per share:
Net earnings	$	75,287	$	45,420

Adjustment to the numerator for continuing
operations and net earnings:
Interest savings assuming conversion of dilutive convertible
and exchangeable notes, net of tax		47		43

Numerator for diluted earnings per share:
Net earnings	$	75,334	$	45,463

Denominator:
Denominator for basic earnings per share:
Weighted average shares		165,186		186,641

Effect of dilutive securities:
Convertible and exchangeable debt instruments		9,761		6,176
Employee stock options		240		5
Other		474		245
Dilutive potential common shares		10,475		6,426

Denominator for diluted earnings per share:
Adjusted weighted average shares		175,661		193,067

Basic earnings per share attributable to Vishay stockholders	$	0.46	$	0.24

Diluted earnings per share attributable to Vishay stockholders	$	0.43	$	0.24

Diluted earnings (loss) 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 2, 2011	April 3, 2010
Convertible and exchangeable notes:
Convertible Subordinated Notes, due 2023	-	87
Weighted average employee stock options	5	2,676
Weighted average warrants	8,824	8,824
Weighted average other	36	85

In periods in which they are dilutive, if the potential common shares related to the exchangeable notes are included in the computation, the related interest savings, net of tax, assuming conversion/exchange is added to the net earnings used to compute earnings per share.

The Company’s convertible debt instruments are only convertible upon the occurrence of certain events. While none of these events has occurred as of April 2, 2011, certain conditions which could trigger conversion have been deemed to be non-substantive, and accordingly, the Company has always assumed the conversion of these instruments in its diluted earnings per share computation during periods in which they are dilutive.

At the direction of its Board of Directors, the Company intends, upon conversion, to repay the principal amount of the convertible senior debentures, due 2040, in cash and settle any additional amounts in shares of Vishay common stock. Accordingly, the debentures are included in the diluted earnings per share computation using the “treasury stock method” (similar to options and warrants) rather than the “if converted method” otherwise required for convertible debt. Under the “treasury stock method,” Vishay calculates the number of shares issuable under the terms of the notes based on the average market price of Vishay common stock during the period, and that number is included in the total diluted shares figure for the period. If the average market price is less than $13.88, no shares are included in the diluted earnings per share computation.

The Company purchased 99.6% of the outstanding convertible subordinated notes due 2023 pursuant to the option of the holders to require the Company to repurchase their notes on August 1, 2008. The remaining notes, with an aggregate principal amount of $1,870,000, were redeemed at Vishay’s option on August 1, 2010.

The Company waived its rights to settle the principal amount of the convertible subordinated notes, due 2023, in shares of Vishay common stock. Accordingly, the notes were included in the diluted earnings per share computation using the “treasury stock method” (similar to options and warrants) rather than the “if converted method” otherwise required for convertible debt. If the average market price was less than $21.28, no shares were included in the diluted earnings per share computation. The convertible subordinated notes were anti-dilutive for the fiscal quarter ended April 3, 2010 and therefore are not included in the computation of diluted earnings per share.

Fair Value Measurements

3 Months Ended

Apr. 02, 2011

Fair Value Measurements [Abstract]

Fair Value Disclosures [Text Block]

Note 10 – 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 (in thousands):

	Total
	Fair Value			Level 1		Level 2		Level 3
April 2, 2011:
Assets held in rabbi trusts	$	26,462		$	15,297	$	11,165	$	-
Available for sale securities	$	6,117			6,117		-		-
Derivative liability	$	(258	)		-		-		(258	)
	$	32,321		$	21,414	$	11,165	$	(258	)

December 31, 2010:
Assets held in rabbi trusts	$	25,585		$	15,575	$	10,010	$	-
Available for sale securities	$	5,736			5,736		-		-
Derivative liability	$	(319	)		-		-		(319	)
	$	31,002		$	21,311	$	10,010	$	(319	)

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 available for sale investments in debt securities that are intended to fund a portion of its other postretirement benefit obligations outside of the U.S. The investments are valued based on quoted market prices on the last business day of the year. The fair value measurement of the investments is considered a Level 1 measurement within the fair value hierarchy.

The convertible senior debentures, due 2040, issued by the Company on November 9, 2010 contain embedded derivative features that GAAP requires to be bifurcated and remeasured each reporting period. Each quarter, the change in the fair value of the embedded derivative features, if any, is recorded in the consolidated statements of operations. The Company uses a derivative valuation model to derive the value of the embedded derivative features. Key inputs into this valuation model are the Company’s current stock price, risk-free interest rates, the stock dividend yield, the stock volatility, and the debenture’s credit spread over London Interbank Offered Rate (LIBOR). The first three aforementioned inputs are based on observable market data and are considered Level 2 inputs while the last two aforementioned inputs are unobservable and thus require management’s judgment and are considered Level 3 inputs. The fair value measurement is considered a Level 3 measurement within the fair value hierarchy.

The fair value of the long-term debt, excluding the derivative liability, at April 3, 2011 and December 31, 2010 is approximately $719.7 million and $624.8 million, respectively, compared to its carrying value, excluding the derivative liability, of $431.7 million and $431.4 million, 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.

The Company’s financial instruments include cash and cash equivalents, short-term investments, accounts receivable, long-term notes receivable, short-term notes payable, and accounts payable. The carrying amounts for these financial instruments reported in the consolidated balance sheets approximate their fair values.

Consolidated Condensed Statement of Equity [Parenthetical]	3 Months Ended
	Apr. 02, 2011 shares
Statement of Stockholders' Equity [Abstract]
Phantom and restricted stock issuances (Shares)	5,000
Stock options exercised (Shares)	452,628
Conversions from Class B to common stock (Shares)	900,290

Income Taxes	3 Months Ended
Income Taxes	Apr. 02, 2011
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	Note 3 – 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 2, 2011 and April 3, 2010 reflect the Company’s expected tax rate on reported income from continuing operations before income tax and tax adjustments. The Company operates in a global environment with significant operations in various locations 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 locations where the Company operates. In January 2011, a new tax law was enacted in Israel which effectively lowered the corporate income tax rate on certain types of income earned after December 31, 2010. Accordingly, the Company’s deferred tax assets in Israel were written down to reflect the lower rate and a one-time tax expense of $10.0 million was recorded in the consolidated condensed statement of operations during the three fiscal months ended April 2, 2011. During the three fiscal months ended April 2, 2011, the liabilities for unrecognized tax benefits increased by $2.2 million on a net basis, principally due to increases for positions taken during prior periods, interest, and foreign exchange effects.

Label	Element	Value
Class B Convertible Common
Entity Common Stock, Shares Outstanding	dei_EntityCommonStockSharesOutstanding	13,452,549