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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2014
Health Care Organization Revenue and Expense [Abstract]  
Service fee revenue
   Years Ended December 31, 
   2014   2013   2012 
Commercial Insurance  $37,384   $38,846   $40,220 
Medicare   12,003    12,472    12,089 
Medicaid   1,872    1,945    1,976 
Workers' Compensation/Personal Injury   2,643    2,746    2,615 
Other   1,156    1,201    1,222 
Service fee revenue, net of contractual allowances and discounts   55,058    57,210    58,122 
                
Provision for bad debts   (2,832)   (2,777)   (2,752)
Net service fee revenue  $52,226   $54,433   $55,370