XML 30 R76.htm IDEA: XBRL DOCUMENT v2.4.1.9
Employee Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Mar. 31, 2013
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]      
401(k) matching contributions expense $ 2.1us-gaap_DefinedContributionPlanCostRecognized $ 2.1us-gaap_DefinedContributionPlanCostRecognized $ 2.6us-gaap_DefinedContributionPlanCostRecognized
Participant balances percent vested (percent) 100.00%idti_DeferredCompensationParticipantBalancesPercentVested    
Deferred compensation plan obligations 13.1us-gaap_DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent 13.8us-gaap_DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent  
Deferred compensation plan assets 16.5us-gaap_DeferredCompensationPlanAssets 16.1us-gaap_DeferredCompensationPlanAssets  
Deferred compensation plan administration expense 0.1idti_DeferredCompensationPlanAdministrationExpense 0.3idti_DeferredCompensationPlanAdministrationExpense 0.3idti_DeferredCompensationPlanAdministrationExpense
Net liability for all international employee benefit plans 1.0us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent 1.4us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent  
Net accumulated liability 0.6us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeMinimumPensionLiabilityAfterTax    
Unrecognized actuarial losses 0.3us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax    
Unrecognized prior service gains 0.1us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax    
Decrease in pension liability 0.6idti_DefinedBenefitPlanDecreaseinPensionLiabilityDuetoCurtailments    
Increase in pension assets 0.4idti_DefinedBenefitPlanIncreaseinPensionAssetsDuetoCurtailments    
Fox Enterprises      
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]      
Deferred compensation plan obligations 1.7us-gaap_DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent
/ us-gaap_PlanNameAxis
= idti_FoxEnterprisesMember
1.6us-gaap_DeferredCompensationCashbasedArrangementsLiabilityClassifiedNoncurrent
/ us-gaap_PlanNameAxis
= idti_FoxEnterprisesMember
 
Deferred compensation plan assets $ 0.8us-gaap_DeferredCompensationPlanAssets
/ us-gaap_PlanNameAxis
= idti_FoxEnterprisesMember
$ 0.7us-gaap_DeferredCompensationPlanAssets
/ us-gaap_PlanNameAxis
= idti_FoxEnterprisesMember