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Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2015
Mar. 30, 2014
Unrealized gain (loss) on:    
Available-for-sale investments $ (25)us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax $ (36)us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Post-retirement plan liability adjustments (7)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (8)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Accumulated other comprehensive loss $ (32)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (44)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax