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COMMERCIAL REAL ESTATE INVESTMENTS - Minimum Future Rentals to be Received on Noncancelable Operating Leases (Details)
$ in Thousands
Jun. 30, 2018
USD ($)
Investment Company [Abstract]  
2018 (remaining) $ 14,895
2019 27,384
2020 22,653
2021 18,271
2022 13,278
Later years 22,002
Total $ 118,483