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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Apr. 04, 2015 Segment | Mar. 29, 2014
Segment Reporting Information [Line Items] |  |
Number of reportable segments | 5 us-gaap_NumberOfReportableSegments |
Product Sales | $ 592,323 us-gaap_SalesRevenueGoodsNet | $ 601,040 us-gaap_SalesRevenueGoodsNet
Royalty Revenues | 1,113 us-gaap_RoyaltyRevenue | 1,338 us-gaap_RoyaltyRevenue
Total Revenue | 593,436 us-gaap_Revenues | 602,378 us-gaap_Revenues
Gross Margin | 145,038 us-gaap_GrossProfit | 145,283 us-gaap_GrossProfit
Segment Operating Income | 47,558 vsh_SegmentOperatingIncome | 42,572 vsh_SegmentOperatingIncome
Restructuring and severance Costs | (1,410)us-gaap_RestructuringCharges | (6,404)us-gaap_RestructuringCharges
MOSFETS Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Sales | 106,759 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember | 113,113 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember
Royalty Revenues | 11 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember | 28 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember
Total Revenue | 106,770 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember | 113,141 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember
Gross Margin | 13,758 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember | 12,617 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember
Diodes Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Sales | 136,511 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember | 136,929 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember
Royalty Revenues | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember
Total Revenue | 136,511 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember | 136,929 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember
Gross Margin | 29,890 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember | 29,765 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember
Optoelectronic Components Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Sales | 68,625 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember | 57,498 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember
Royalty Revenues | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember
Total Revenue | 68,625 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember | 57,498 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember
Gross Margin | 22,183 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember | 21,237 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember
Resistors And Inductors Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Sales | 186,392 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember | 187,989 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember
Royalty Revenues | 1,102 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember | 1,310 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember
Total Revenue | 187,494 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember | 189,299 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember
Gross Margin | 58,849 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember | 60,120 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember
Capacitors Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Sales | 94,036 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember | 105,511 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember
Royalty Revenues | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember | 0 us-gaap_RoyaltyRevenue / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember
Total Revenue | 94,036 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember | 105,511 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember
Gross Margin | 20,358 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember | 21,544 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember
Operating Segments [Member] | MOSFETS Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | 4,527 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember | 2,487 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_MosfetsSegmentMember
Operating Segments [Member] | Diodes Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | 23,485 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember | 23,058 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_DiodesSegmentMember
Operating Segments [Member] | Optoelectronic Components Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | 17,087 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember | 17,404 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_OptoelectronicComponentsSegmentMember
Operating Segments [Member] | Resistors And Inductors Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | 49,525 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember | 50,336 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_ResistorsAndInductorsSegmentMember
Operating Segments [Member] | Capacitors Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | 14,564 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember | 15,341 vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = vsh_CapacitorsSegmentMember
Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Restructuring and severance Costs | (1,410)us-gaap_RestructuringCharges / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (6,404)us-gaap_RestructuringCharges / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Segment Reconciling Items [Member] | Unallocated Amount to Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Operating Income | $ (60,220)vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember | $ (59,650)vsh_SegmentOperatingIncome / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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