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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Current assets:    
Allowance for doubtful accounts $ 6,136us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 3,919us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accumulated amortization of other intangible assets $ 16,232us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ 12,909us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
STOCKHOLDERS’ EQUITY:    
Common stock, par value (in dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 72,878,000us-gaap_CommonStockSharesIssued 71,868,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 72,878,000us-gaap_CommonStockSharesOutstanding 71,868,000us-gaap_CommonStockSharesOutstanding
Common stock in treasury, shares 1,821,000us-gaap_TreasuryStockShares 1,892,000us-gaap_TreasuryStockShares