1. NATURE OF BUSINESS AND BASIS OF PRESENTATION (Details - Revenue) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Commercial Insurance	$ 117,107	$ 104,901	$ 216,872	$ 204,977
Medicare	42,088	39,412	79,172	77,317
Medicaid	5,974	6,230	11,469	12,049
Workers Compensation/Personal Injury	8,130	7,853	15,559	15,034
Other	15,104	10,279	30,361	18,061
Service fee revenue, net of contractual allowances and discounts	188,403	168,675	353,433	327,438
Provision for bad debts	(8,387)	(7,520)	(15,862)	(14,413)
Net service fee revenue	180,016	161,155	337,571	313,025
Revenue under capitation arrangements	24,273	17,927	47,985	34,933
Total net revenue	$ 204,289	$ 179,082	$ 385,556	$ 347,958