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Earnings Per Share (Details) (USD $) In Thousands, except Per 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, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Numerator for basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings attributable to Vishay stockholders | $ 29,206 us-gaap_NetIncomeLoss |  | $ 26,971 us-gaap_NetIncomeLoss |  | $ 35,642 us-gaap_NetIncomeLoss |  | $ 25,810 us-gaap_NetIncomeLoss |  | $ 30,021 us-gaap_NetIncomeLoss |  | $ 32,719 us-gaap_NetIncomeLoss |  | $ 31,309 us-gaap_NetIncomeLoss |  | $ 28,931 us-gaap_NetIncomeLoss |  | $ 117,629 us-gaap_NetIncomeLoss | $ 122,980 us-gaap_NetIncomeLoss | $ 122,738 us-gaap_NetIncomeLoss
Adjustment to the numerator for continuing operations and net earnings (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest savings assuming conversion of dilutive convertible and exchangeable notes, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 59 us-gaap_InterestOnConvertibleDebtNetOfTax | 140 us-gaap_InterestOnConvertibleDebtNetOfTax | 293 us-gaap_InterestOnConvertibleDebtNetOfTax
Numerator for diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 117,688 us-gaap_NetIncomeLossAttributableToParentDiluted | $ 123,120 us-gaap_NetIncomeLossAttributableToParentDiluted | $ 123,031 us-gaap_NetIncomeLossAttributableToParentDiluted
Denominator for basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Issued, Basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 147,448 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 144,856 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 149,020 us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 119 us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights | 107 us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights | 97 us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights
Weighted average shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 147,567 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 144,963 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 149,117 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible and exchangeable debt instruments (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,890 vsh_IncrementalCommonSharesAttributableToConversionOfDebtSecuritiesTreasuryStockMethod | 6,130 vsh_IncrementalCommonSharesAttributableToConversionOfDebtSecuritiesTreasuryStockMethod | 6,176 vsh_IncrementalCommonSharesAttributableToConversionOfDebtSecuritiesTreasuryStockMethod
Restricted stock units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 252 vsh_IncrementalCommonSharesAttributableToRestrictedStockUnits | 320 vsh_IncrementalCommonSharesAttributableToRestrictedStockUnits | 549 vsh_IncrementalCommonSharesAttributableToRestrictedStockUnits
Other (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 vsh_IncrementalCommonSharesOtherAdjustments | 4 vsh_IncrementalCommonSharesOtherAdjustments | 2 vsh_IncrementalCommonSharesOtherAdjustments
Dilutive potential common shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,149 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 6,454 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 6,727 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Denominator for diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted weighted average shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 153,716 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 151,417 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 155,844 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.20 us-gaap_EarningsPerShareBasic | [1] | $ 0.18 us-gaap_EarningsPerShareBasic | [1] | $ 0.24 us-gaap_EarningsPerShareBasic | [1] | $ 0.17 us-gaap_EarningsPerShareBasic | [1] | $ 0.20 us-gaap_EarningsPerShareBasic | [1] | $ 0.23 us-gaap_EarningsPerShareBasic | [1] | $ 0.22 us-gaap_EarningsPerShareBasic | [1] | $ 0.20 us-gaap_EarningsPerShareBasic | [1] | $ 0.80 us-gaap_EarningsPerShareBasic | $ 0.85 us-gaap_EarningsPerShareBasic | $ 0.82 us-gaap_EarningsPerShareBasic
Diluted earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.19 us-gaap_EarningsPerShareDiluted | [1] | $ 0.17 us-gaap_EarningsPerShareDiluted | [1] | $ 0.23 us-gaap_EarningsPerShareDiluted | [1] | $ 0.17 us-gaap_EarningsPerShareDiluted | [1] | $ 0.20 us-gaap_EarningsPerShareDiluted | [1] | $ 0.22 us-gaap_EarningsPerShareDiluted | [1] | $ 0.21 us-gaap_EarningsPerShareDiluted | [1] | $ 0.19 us-gaap_EarningsPerShareDiluted | [1] | $ 0.77 us-gaap_EarningsPerShareDiluted | $ 0.81 us-gaap_EarningsPerShareDiluted | $ 0.79 us-gaap_EarningsPerShareDiluted
Convertible Senior Debentures, Due 2040 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2040Member | 19,809 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2040Member | 19,809 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2040Member
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 13.66 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2040Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13.66 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2040Member |  |
Convertible Senior Debentures, Due 2041 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,944 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2041Member | 7,885 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2041Member | 7,885 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2041Member
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 18.72 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2041Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.72 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebenturesDue2041Member |  |
Convertible Senior Debentures 2042 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebentures2042Member | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebentures2042Member | 7,434 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebentures2042Member
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 11.62 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebentures2042Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11.62 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_ConvertibleSeniorDebentures2042Member |  |
Weighted average stock options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 77 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockCompensationPlanMember | 91 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockCompensationPlanMember | 177 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockCompensationPlanMember
Weighted average warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember | 8,390 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember
Weighted average other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 135 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_WeightedAverageOtherMember | 385 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_WeightedAverageOtherMember | 282 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = vsh_WeightedAverageOtherMember
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