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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Other Current Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Security deposits payable $ 5,933 $ 14,188
Operating lease liabilities 15,835  
Accrued rent 2,315 2,885
Dividends payable 930 930
Miscellaneous current liabilities 3,062 4,282
Other current liabilities $ 28,075 $ 22,285