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Condensed Consolidated Balance Sheet (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Condensed Consolidated Balance Sheet [Abstract]    
Allowance for doubtful accounts, Accounts receivable $ 1,172us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,199us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 600,000,000us-gaap_PreferredStockSharesAuthorized 600,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 230,000,000us-gaap_CommonStockSharesAuthorized 230,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 35,453,000us-gaap_CommonStockSharesIssued 35,394,000us-gaap_CommonStockSharesIssued
Treasury stock, shares at cost 4,401,000us-gaap_TreasuryStockShares 4,367,000us-gaap_TreasuryStockShares