Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 26, 2015	Jan. 25, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 3,857	$ 3,523
Accumulated depreciation	$ 125,499	$ 120,588
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000us-gaap_CommonStockSharesAuthorized	250,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	78,136,144us-gaap_CommonStockSharesIssued	78,136,144us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	66,389,228us-gaap_CommonStockSharesOutstanding	66,812,919us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	11,746,916us-gaap_TreasuryStockShares	11,323,225us-gaap_TreasuryStockShares

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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