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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 28, 2013
Mar. 30, 2013
Statement of Financial Position [Abstract]    
Trade receivables, allowances $ 410us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 404us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 101,347us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 98,333us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Finite-Lived Intangible Assets, Accumulated Amortization $ 19,488us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ 18,378us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Preferred stock, without par value $ 0us-gaap_PreferredStockNoParValue $ 0us-gaap_PreferredStockNoParValue
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, without par value $ 0us-gaap_CommonStockNoParValue $ 0us-gaap_CommonStockNoParValue
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued 30,606,000us-gaap_CommonStockSharesIssued 30,155,000us-gaap_CommonStockSharesIssued
Common stock, outstanding 30,606,000us-gaap_CommonStockSharesOutstanding 30,155,000us-gaap_CommonStockSharesOutstanding