SIGNIFICANT ACCOUNTING POLICIES (Details - Gain on Derivative) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Offsetting Assets [Line Items]
Beginning balance, value	$ 281,358	$ 207,189	$ 258,303	$ 233,139
Amount of comprehensive loss recognized on derivative net of taxes	0	(409)	0	(18,958)
Amount of loss reclassified out of accumulated OCI into income (prior period effective portion), net of taxes	920	892	1,845	892
Ending balance, value	299,279	$ 233,256	299,279	$ 233,256
Interest rate contracts
Offsetting Assets [Line Items]
Amount of comprehensive loss recognized on derivative net of taxes	0		0
Amount of loss reclassified out of accumulated OCI into income (prior period effective portion), net of taxes	920		1,845
Other income (expense) | Interest rate contracts
Offsetting Assets [Line Items]
Amount of gain recognized in income on derivative (current period ineffective portion)	35		11,280
Interest Expense | Interest rate contracts
Offsetting Assets [Line Items]
Amount of loss reclassified out of accumulated OCI into income (prior period effective portion), net of taxes	(1,245)		(2,169)
Accumulated Other Comprehensive Loss, net of taxes | Interest rate contracts
Offsetting Assets [Line Items]
Beginning balance, value	(21,656)		(22,581)
Ending balance, value	$ (20,736)		$ (20,736)