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MORTGAGE NOTES RECEIVABLE (Notes Paid Off Narrative) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Mortgage Notes Receivable [Abstract]        
Mortgage Loans on Real Estate $ 773,563 $ 710,858 $ 671,232 $ 639,343