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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Apr. 30, 2015
Jul. 31, 2014
CONDENSED CONSOLIDATED BALANCE SHEETS    
Accounts receivable, allowance for doubtful accounts (in dollars) $ 1,955us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,874us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred Stock, par value (in dollars per share) $ 1.00us-gaap_PreferredStockParOrStatedValuePerShare $ 1.00us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, authorized shares 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common Stock, par value (in dollars per share) $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, authorized shares 75,000,000us-gaap_CommonStockSharesAuthorized 75,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, shares issued 45,839,444us-gaap_CommonStockSharesIssued 45,641,688us-gaap_CommonStockSharesIssued
Common Stock, shares outstanding 41,537,328us-gaap_CommonStockSharesOutstanding 41,442,260us-gaap_CommonStockSharesOutstanding
Treasury Stock, shares 4,302,116us-gaap_TreasuryStockShares 4,199,428us-gaap_TreasuryStockShares