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CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Trade receivables, allowance for doubtful accounts (in dollars) $ 10,944us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 9,078us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Financed receivables, short-term, allowance for doubtful accounts (in dollars) 1,748us-gaap_AllowanceForNotesAndLoansReceivableCurrent 1,777us-gaap_AllowanceForNotesAndLoansReceivableCurrent
Financed receivables, long-term, allowance for doubtful accounts (in dollars) $ 1,402us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent $ 1,423us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent
Preferred Stock, No Par Value      
Preferred stock, shares authorized 500,000us-gaap_PreferredStockSharesAuthorized 500,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share) $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 250,000,000us-gaap_CommonStockSharesAuthorized 250,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 145,721,938us-gaap_CommonStockSharesIssued 145,864,443us-gaap_CommonStockSharesIssued
Treasury Stock, shares issued 200,000us-gaap_TreasuryStockShares 0us-gaap_TreasuryStockShares