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Long-term Debt (Narrative) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Maturities Of Long Term Debt [Abstract]    
Long-term debt outstanding $ 48,024 $ 12,352
Real estate secured loans 507,462  
Long-term debt, aggregate principal amounts due, 2019 12,234  
Long-term debt, aggregate principal amounts due, 2020 34,246  
Long-term debt, aggregate principal amounts due, 2021 258  
Long-term debt, aggregate principal amounts due, 2022 271  
Long-term debt, aggregate principal amounts due, 2023 284  
Long-term debt, aggregate principal amounts due, thereafter $ 835