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Long-Term Debt (Tables)
9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]  
Long-term debt (in thousands)

    September 30,   December 31,
    2018   2017
5.6% to 8% mortgage notes                
  due in installments through 2027   —         29,664  
Riverfront permanent loan     88,755       88,653  
    88,755       118,317  
Less portion due within one year     —         4,463  
    $ 88,755       113,854