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Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Cash dividends per share | $ 0.06 us-gaap_CommonStockDividendsPerShareCashPaid |  | $ 0.06 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.06 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.06 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.24 us-gaap_CommonStockDividendsPerShareCashPaid |  | $ 0 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0 us-gaap_CommonStockDividendsPerShareCashPaid
Permitted stock repurchase or cash dividend payment capacity under credit facility | $ 192,733 vsh_PermittedStockRepurchaseCapacityUnderCreditFacility |  |  |  |  | $ 192,733 vsh_PermittedStockRepurchaseCapacityUnderCreditFacility |  |  |
Shares reserved (in shares) | 66,211,582 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |  |  |  |  | 66,211,582 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |  |  |
Class B Convertible Common Stock [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Voting rights per share |  |  |  |  |  | 10 |  |  |
Conversion feature |  |  |  |  |  | one-for-one |  |  |
Shares reserved (in shares) | 12,129,227 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | [1] |  |  |  | 12,129,227 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | [1] |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Voting rights per share |  |  |  |  |  | 1 |  |  |
Common stock options outstanding [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 105,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_CommonStockOptionsOutstandingMember |  |  |  |  | 105,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_CommonStockOptionsOutstandingMember |  |  |
Restricted stock units outstanding [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 1,147,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_RestrictedStockUnitsOutstandingMember |  |  |  |  | 1,147,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_RestrictedStockUnitsOutstandingMember |  |  |
Available to grant 2007 Stock Incentive Program - [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 3,693,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_AvailableToGrant2007StockIncentiveProgramMember |  |  |  |  | 3,693,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_AvailableToGrant2007StockIncentiveProgramMember |  |  |
Phantom stock units outstanding [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 119,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_PhantomStockUnitsOutstandingMember |  |  |  |  | 119,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_PhantomStockUnitsOutstandingMember |  |  |
Exchangeable Unsecured Notes, Due 2102 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 2,511,742 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ExchangeableUnsecuredNotesDue2102Member |  |  |  |  | 2,511,742 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ExchangeableUnsecuredNotesDue2102Member |  |  |
Convertible Senior Debentures, Due 2040 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 22,685,258 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2040Member |  |  |  |  | 22,685,258 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2040Member |  |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  | 20,134,043 us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2040Member |  |  |
Convertible Senior Debentures, Due 2041 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 9,070,490 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2041Member | [1] |  |  |  | 9,070,490 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2041Member | [1] |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  | 8,014,230 us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebenturesDue2041Member |  |  |
Convertible Senior Debentures 2042 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | 14,750,865 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebentures2042Member | [1] |  |  |  | 14,750,865 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebentures2042Member | [1] |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  | 12,912,435 us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments / us-gaap_StatementClassOfStockAxis = vsh_ConvertibleSeniorDebentures2042Member |  |  |
[1] | The convertible senior debentures due 2040, due 2041, and due 2042 are convertible into 20,134,043, 8,014,230, and 12,912,435 shares, respectively, of Vishay common stock. The Company has reserved the maximum amount of shares to be delivered upon a make-whole fundamental change as defined in the indentures governing the debentures.

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