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ACCOUNTING POLICIES (Details) (Single customer, Maximum)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Revenues | Customer concentration risk
   
Concentration of Credit Risk    
Percentage of concentration of credit risk 4.00% 4.00%
Accounts receivable | Credit concentration risk
   
Concentration of Credit Risk    
Percentage of concentration of credit risk 4.00% 8.00%