INCOME TAXES (Details - Income Tax Provision Components) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current income tax expense:
Federal	$ 10,055	$ 11,519	$ 5,847
State	2,606	2,480	1,149
Current income tax expense	12,661	13,999	6,996
Deferred income tax (benefit) provision:
Federal	(3,805)	3,703	(19,676)
State	(2,565)	2,664	(10,293)
Deferred income tax (benefit) provision	(6,370)	6,367	(29,969)
Income tax expense (benefit)	$ 6,291	$ 20,366	$ (22,973)