SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Restricted Cash) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 5,925	$ 7,331	$ 11,381
Restricted cash, held by lenders in lockbox accounts
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	2,600	3,100
Restricted cash, held by lenders in escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 3,300	$ 4,200