INCOME TAXES (Details - Reconciliation of Provision for Income Taxes) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective tax rate reconciliation [Abstract]
Expected federal income tax provision at statutory rate	$ 47,832	$ 903	$ 24,820
State income taxes, net of federal benefit	3,638	(678)	1,965
Foreign income taxes, net effect	(31)	469	336
Increase (decrease) in valuation allowance	(103)	1,956	(2,397)
Nondeductible compensation	141	574	554
Nondeductible transaction costs	103	229	0
Meals and entertainment	712	1,032	415
Tax rate changes	283	1,203	61
Research credits	(920)	0	0
Other adjustments	(64)	358	290
Income tax expense, net	$ 51,591	$ 6,046	$ 26,044