SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Cash) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Cash and cash equivalents	$ 91,871	$ 40,087	$ 34,736	$ 20,538
Restricted cash	22,115	6,987	7,913	2,503
Total cash, cash equivalents, and restricted cash	$ 113,986	$ 47,074	$ 42,649	$ 23,041