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Subsequent Events (Details) (High-Speed Converter Business, Subsequent Event, USD $)
Apr. 30, 2015
Apr. 27, 2015
High-Speed Converter Business | Subsequent Event
    
Subsequent Event [Line Items]    
Divesture consideration   $ 1,500,000us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= idti_HighSpeedConverterBusinessMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Share repurchase plan, authorized amount (in USD) $ 300,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= idti_HighSpeedConverterBusinessMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember