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Current Vulnerability Due to Certain Concentrations (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Concentration Risks [Abstract] |  |
Duration of business operations in Israel (in years) | P44Y |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Bank Hapoalim |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 12.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_BankFourMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Bank Leumi [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 10.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_BankOneMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | HSBC [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 12.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_BankFiveMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Deutsche Bank [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 12.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_BankSevenMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |
Geographic Concentration [Member] | Outside Of United States [Member] |  |
Concentration Risks [Abstract] |  |
Cash and cash equivalents and short-term investments | 1,100,025 vsh_CashAndCashEquivalentsAndShortTermInvestments / vsh_ConcentrationRiskByCounterpartyAxis = vsh_OutsideOfUnitedStatesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | United States [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 1.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_US / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Germany [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 41.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_DE / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Other Europe [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 1.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_OtherEuropeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Israel [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 26.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_IL / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | People's Republic Of China [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 8.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_CN / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Other Asia [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 1.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_OtherAsiaMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Other [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 0.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_OtherGeographicAreaMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Singapore [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 7.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_SG / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | The Republic of China (Taiwan) |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 9.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_TW / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Canada [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 1.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = vsh_CashAndCashEquivalentsAndShortTermInvestmentsMember / vsh_ConcentrationRiskByCounterpartyAxis = country_CA / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration [Member] | Revenue [Member] | Outside Of United States [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 76.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / vsh_ConcentrationRiskByCounterpartyAxis = vsh_OutsideOfUnitedStatesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 14.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 13.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition No authoritative reference available. + References No definition available. + Details
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- Definition The number of years that the business operation in Israel has existed. + References No definition available. + Details
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