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Summary of Quarterly Financial Information (Unaudited) (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
Statement of Operations data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 610,764 us-gaap_Revenues |  | $ 638,211 us-gaap_Revenues |  | $ 641,929 us-gaap_Revenues |  | $ 602,378 us-gaap_Revenues |  | $ 616,170 us-gaap_Revenues |  | $ 602,890 us-gaap_Revenues |  | $ 597,665 us-gaap_Revenues |  | $ 554,254 us-gaap_Revenues |  | $ 2,493,282 us-gaap_Revenues | $ 2,370,979 us-gaap_Revenues | $ 2,230,097 us-gaap_Revenues
Gross profit | 143,524 us-gaap_GrossProfit |  | 158,392 us-gaap_GrossProfit |  | 164,093 us-gaap_GrossProfit |  | 145,283 us-gaap_GrossProfit |  | 144,449 us-gaap_GrossProfit |  | 143,220 us-gaap_GrossProfit |  | 142,857 us-gaap_GrossProfit |  | 136,761 us-gaap_GrossProfit |  | 611,292 us-gaap_GrossProfit | 567,260 us-gaap_GrossProfit | 526,673 us-gaap_GrossProfit
Operating Income | 43,157 us-gaap_OperatingIncomeLoss |  | 45,459 us-gaap_OperatingIncomeLoss |  | 57,923 us-gaap_OperatingIncomeLoss |  | 42,572 us-gaap_OperatingIncomeLoss |  | 47,034 us-gaap_OperatingIncomeLoss |  | 53,153 us-gaap_OperatingIncomeLoss |  | 51,890 us-gaap_OperatingIncomeLoss |  | 45,605 us-gaap_OperatingIncomeLoss |  | 189,111 us-gaap_OperatingIncomeLoss | 197,682 us-gaap_OperatingIncomeLoss | 189,201 us-gaap_OperatingIncomeLoss
Net earnings | 29,070 us-gaap_ProfitLoss |  | 26,977 us-gaap_ProfitLoss |  | 35,832 us-gaap_ProfitLoss |  | 25,964 us-gaap_ProfitLoss |  | 30,274 us-gaap_ProfitLoss |  | 32,869 us-gaap_ProfitLoss |  | 31,485 us-gaap_ProfitLoss |  | 29,141 us-gaap_ProfitLoss |  | 117,843 us-gaap_ProfitLoss | 123,769 us-gaap_ProfitLoss | 123,531 us-gaap_ProfitLoss
Net earnings (loss) attributable to noncontrolling interests | (136)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 6 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 190 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 154 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 253 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 150 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 176 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 210 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  | 214 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 789 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 793 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net earnings (loss) 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
Per Share data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share attributable to Vishay stockholders: | $ 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: | $ 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
Operating income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance costs | 1,971 us-gaap_RestructuringAndRelatedCostIncurredCost |  | 3,508 us-gaap_RestructuringAndRelatedCostIncurredCost |  | 9,014 us-gaap_RestructuringAndRelatedCostIncurredCost |  | 6,404 us-gaap_RestructuringAndRelatedCostIncurredCost |  | (2,814)us-gaap_RestructuringAndRelatedCostIncurredCost |  | 0 us-gaap_RestructuringAndRelatedCostIncurredCost |  | 0 us-gaap_RestructuringAndRelatedCostIncurredCost |  | 0 us-gaap_RestructuringAndRelatedCostIncurredCost |  | (20,897)us-gaap_RestructuringAndRelatedCostIncurredCost | (2,814)us-gaap_RestructuringAndRelatedCostIncurredCost |
U.S. pension settlement charges | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 15,588 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 |  | 15,588 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1
Gain on Sale of Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 vsh_GainOnSaleOfPropertyBelgium | 0 vsh_GainOnSaleOfPropertyBelgium | 12,153 vsh_GainOnSaleOfPropertyBelgium
Executive compensation credit | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 1,778 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge |  | 0 vsh_ExecutiveCompensationCharge | (1,778)vsh_ExecutiveCompensationCharge | 0 vsh_ExecutiveCompensationCharge
Discrete Tax Items Included Income Tax Expense | $ (1,228)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ 0 vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ 0 vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ 0 vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ 0 vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ (2,867)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ 0 vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ (1,330)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense |  | $ (1,228)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense | $ (4,197)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense | $ (4,036)vsh_DiscreteTaxItemsIncludedIncomeTaxExpense
Quarter end date | Dec. 31, 2014 | [2] | Sep. 27, 2014 | [2] | Jun. 28, 2014 | [2] | Mar. 29, 2014 | [2] | Dec. 31, 2013 | [2] | Sep. 28, 2013 | [2] | Jun. 29, 2013 | [2] | Mar. 30, 2013 | [2] | Dec. 31, 2014 |  |
Number of weeks in an interim reporting period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | P91D |  |
[1] | May not add due to differences in weighted average share counts.
[2] | 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.

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