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2. SUMMARY OF ACCOUNTING POLICIES (Details - Summary of net revenue) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accounting Policies [Abstract]      
Commercial Insurance $ 432,608 $ 409,114 $ 376,107
Medicare 139,220 122,971 107,613
Medicaid 21,351 20,101 17,756
Workers Compensation/Personal Injury 30,819 26,604 23,137
Other 41,309 39,192 30,367
Service fee revenue, net of contractual allowances and discounts 665,307 617,982 554,979
Provision for bad debts (27,911) (25,904) (22,339)
Net service fee revenue 637,396 592,078 532,640
Revenue under capitation arrangements 65,590 55,075 52,481
Total net revenue $ 702,986 $ 647,153 $ 585,121