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%