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FINANCING RECEIVABLES (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
FINANCING RECEIVABLES      
Percentage of financing done by the Company depending upon the individual's credit score 100.00%    
Financed receivables include installment receivable amounts which are due subsequent to one year      
Gross Financed Receivables, short-term $ 13,665 $ 13,350  
Gross Financed Receivables, long-term 13,089 12,607  
Allowance for Doubtful Accounts (3,250) (3,000)  
Net Financed Receivables 23,504 22,957  
Number of days to elapse for financing receivables to be charged-off 180 days    
Charge-offs as a percentage of average financing receivables 2.60% 3.00% 4.00%
Number of days the Company offers cash financing to customers 90 days    
Period of past due loans that continue to accrue interest due to an administrative issue 180 days    
Long-Term Installment receivables, net 11,681 11,298  
Allowance for doubtful accounts related to financing receivables      
Balance, beginning of period 3,000 2,700  
Additions to allowance 906 977  
Deductions, net of recoveries (656) (677)  
Balance, end of period 3,250 3,000 2,700
Past due financing receivables      
30 - 59 days past due 563 590  
60 - 89 days past due 190 183  
90 days or more past due 331 450  
Total $ 1,084 $ 1,223  
Percentage of period-end gross financing receivables      
Current (as a percent) 95.90% 95.30%  
30 - 59 days past due (as a percent) 2.10% 2.30%  
60 - 89 days past due (as a percent) 0.70% 0.70%  
90 days or more past due (as a percent) 1.30% 1.70%  
Total (as a percent) 100.00% 100.00%