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MORTGAGE NOTES RECEIVABLE (Notes Paid Off Narrative) (Detail)
$ in Thousands
1 Months Ended
Jan. 31, 2018
USD ($)
loan
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Mortgage Loans on Real Estate   $ 710,858 $ 671,232 $ 639,343 $ 679,795
Mortgage Notes Paid Off [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Mortgage Loans on Real Estate $ 21,200        
Mortgage Loans, Interest Rate 8.75%        
Mortgage Loans on Real Estate, Number of Loans | loan 2