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COMMERCIAL REAL ESTATE INVESTMENTS - Minimum Future Rentals to be Received on Noncancelable Operating Leases (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Real Estate Properties Base Purchase Price [Abstract]  
2018 $ 29,245
2019 25,845
2020 21,192
2021 17,029
2022 12,141
Later years 20,552
Total $ 126,004