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Derivatives - (Narratives) (Details) - USD ($)
 12 Months Ended
Jan. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Line Items]      
Deferred losses on derivative instruments accumulated in AOCI expected to be reclassified to earnings   $ 61,000  
Derivative Interest Rate Swap Effective Percentage   100.00%  
Secured Debt   $ 60,795,000 $ 11,748,000
Line of Credit Facility, Maximum Borrowing Capacity $ 25,000,000    
Proceeds from interest rate swaps unwinding   100,000  
Other Assets [Member] | Derivatives qualifying as hedges [Member]      
Derivative Instruments And Hedging Activities Disclosure [Line Items]      
Notional Amount of Interest Rate Derivatives   $ 34,090,000 $ 11,900,000
Term Loan [Member]      
Derivative Instruments And Hedging Activities Disclosure [Line Items]      
Notional Amount of Interest Rate Swaps $ 36,000,000    
LIBOR Fixed Rate 2.72%    
Secured Debt $ 64,000,000