INCOME TAXES (Details - Deferred Income Taxes - Components) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Provision for accrued expenses	$ 4,907	$ 12,234
Leasing	24,864	7,299
Net operating loss carryforwards	56,190	56,450
Non-cash compensation expense	20,746	15,805
Intangible assets	12,684	4,182
Interest limitation	4,059	987
Contingent liabilities	4,507	9,366
Tax credits	13,656	6,124
Other	3,605	446
Total gross deferred tax assets	145,218	112,893
Less: valuation allowance	(5,802)	(4,102)	$ (2,229)	$ (2,694)
Total deferred tax assets, net of the valuation allowance	139,416	108,791
Deferred tax liabilities:
Leasing	(21,632)	(6,596)
Property and equipment	(5,015)	(4,748)
Other	(653)	(1,835)
Total gross deferred tax liabilities	(27,300)	(13,179)
Net deferred taxes	112,116	$ 95,612
Federal
Deferred tax liabilities:
Operating loss carryforwards	179,500
State
Deferred tax liabilities:
State operating loss carryforwards	$ 519,500