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Investments In Direct Financing Lease (Future Minimum Rentals Receivable) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Capital Leases, Net Investment in Direct Financing Leases [Abstract]    
2018 $ 3,184  
2019 6,490  
2020 6,685  
2021 6,885  
2022 7,092  
Thereafter 78,958  
Total $ 109,294 $ 112,411