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CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Unaudited) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Trade receivables, short-term, allowance for doubtful accounts (in dollars) $ 10,049us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 10,944us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Financed receivables, short-term, allowance for doubtful accounts (in dollars) 1,716us-gaap_AllowanceForNotesAndLoansReceivableCurrent 1,748us-gaap_AllowanceForNotesAndLoansReceivableCurrent
Financed receivables, long-term, allowance for doubtful accounts (in dollars) $ 1,434us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent $ 1,402us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent
Preferred stock, shares authorized 500,000us-gaap_PreferredStockSharesAuthorized 500,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, no par value (in dollars per share)      
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 218,840,608us-gaap_CommonStockSharesIssued 218,482,907us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 218,840,608us-gaap_CommonStockSharesOutstanding 218,482,907us-gaap_CommonStockSharesOutstanding
Treasury Stock, par value $ 1rol_TreasuryStockParOrStatedValuePerShare $ 1rol_TreasuryStockParOrStatedValuePerShare
Treasury Stock, Shares 200,000us-gaap_TreasuryStockShares 200,000us-gaap_TreasuryStockShares