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Derivative Financial Instruments (Details) (Foreign Exchange Contract, USD $)
In Millions, unless otherwise specified
Mar. 29, 2015
Foreign Exchange Contract
  
Derivatives, Fair Value [Line Items]  
Foreign exchange facility available capacity $ 20.0idti_DerivativeInstrumentAvailableCapacity
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember