5. REVOLVING CREDIT FACILITY, NOTES PAYABLE AND CAPITAL LEASES (Details - Schedule of debt) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Discounts on term loan and notes	$ (15,915)	$ (16,783)
Promissory notes payable	787	980
Equipment notes payable	269	341
Obligations under capital leases	9,015	7,256
Total notes payable, line of credit and capital lease obligations	628,969	638,732
Less: current portion	(27,317)	(26,557)
Total notes payable, line of credit and capital lease obligations, long-term	601,652	612,175
First Lien Term Loans [Member]
Term loans	466,813	478,938
Second Lien Term Loans [Member]
Term loans	$ 168,000	$ 168,000