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10. INCOME TAXES (Details - Reconciliation of the statutory U.S. federal rate and effective rates) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal tax									$ 8,971	$ 4,229	$ 4,979
State franchise tax, net of federal benefit									1,799	224	1,245
Other Non deductible expenses									91	(11)	(1)
Changes in valuation allowance									(1,045)	585	(2,536)
Tax Cuts and Jobs Act									13,527	0	0
Deferred true-ups and other									(194)	(3,142)	1,964
Other reconciling items									1,161	2,547	356
Income tax expense (benefit)	$ 20,133	$ 1,112	$ 3,523	$ (458)	$ 1,901	$ 1,458	$ 2,253	$ (1,180)	$ 24,310	$ 4,432	$ 6,007
Federal tax									34.00%	34.00%	34.00%
State franchise tax, net of federal benefit									6.82%	1.80%	8.50%
Other Non deductible expenses									0.35%	(0.09%)	(0.01%)
Changes in valuation allowance									(3.96%)	4.70%	(17.32%)
Tax Cuts and Jobs Act									51.27%	0.00%	0.00%
Deferred true-ups and other									(0.74%)	(25.25%)	13.41%
Other reconciling items									4.39%	20.47%	2.43%
Income tax expense (benefit)									92.13%	35.64%	41.02%

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