SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Part 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Impairment of Long-Lived Assets [Abstract]
Impairment of long-lived assets	$ 0	$ 0	$ 11,500
Concentration of Credit Risk [Abstract]
Federal deposit insurance limit	250
Excess cash, FDIC uninsured amount	45,300
ASU 2016-02 [Member] | Plan [Member] | Minimum [Member]
New Accounting Pronouncements [Abstract]
Right to use asset	42,000
Lease liability	46,000
ASU 2016-02 [Member] | Plan [Member] | Maximum [Member]
New Accounting Pronouncements [Abstract]
Right to use asset	45,000
Lease liability	$ 49,000