SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Part 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Impairment of Long-Lived Assets [Abstract]
Impairment of long-lived assets	$ 0	$ 0	$ 0
Concentration of Credit Risk [Abstract]
Federal deposit insurance limit	250
Excess cash, FDIC uninsured amount	38,000
Income Taxes [Abstract]
Interest and penalties expense	0	0
New Accounting Pronouncements [Abstract]
Lease liability	55,160	5,600
Right to use asset	$ 49,065	0
ASU 2016-02 [Member]
New Accounting Pronouncements [Abstract]
Lease liability		42,300
Right to use asset		$ 37,993