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MORTGAGE DEBT AND BANK LOANS (Details textuals) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Mortgage Debt And Bank Loans [Line Items]      
Direct issuance costs for borrowings $ 4.8 $ 5.4 $ 5.1
Increase in amount of financing agreement 3.7    
ABN AMRO      
Mortgage Debt And Bank Loans [Line Items]      
Amount of financing agreement $ 70.0