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Real Estate (Components of Net Investment in Direct Financing Leases) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Real Estate [Abstract]    
Minimum lease payments to be received $ 10,609 $ 10,899
Estimated unguaranteed residual values 3,632 4,395
Less unearned income (7,022) (7,225)
Net investment in direct financing leases $ 7,219 $ 8,069