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Note 18 - Income Taxes (Details) - Total Unrecognized Gross Tax Benefits (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2015
Mar. 30, 2014
Mar. 31, 2013
Apr. 01, 2012
Total Unrecognized Gross Tax Benefits [Abstract]        
Unrecognized gross tax benefits $ 17,636us-gaap_UnrecognizedTaxBenefits $ 14,164us-gaap_UnrecognizedTaxBenefits $ 15,465us-gaap_UnrecognizedTaxBenefits $ 16,820us-gaap_UnrecognizedTaxBenefits
Less: amount used to reduce deferred tax assets 13,285exar_AccruedIncomeTaxAmountUsedToReduceDeferredTaxAssets 13,370exar_AccruedIncomeTaxAmountUsedToReduceDeferredTaxAssets    
Net income tax payable(1) $ 4,351us-gaap_AccruedIncomeTaxes [1] $ 794us-gaap_AccruedIncomeTaxes [1]    
[1] Included in other non-current obligations line item in consolidated balance sheet.