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Notes Payable and Credit Facility - Narrative (Details) - USD ($)
12 Months Ended
May 17, 2018
Mar. 23, 2018
Sep. 03, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Sep. 02, 2016
Jul. 11, 2013
Debt Instrument [Line Items]                
Payment for Debt Extinguishment or Debt Prepayment Cost       $ 400,000 $ 0 $ 0    
Long-term Federal Home Loan Bank Advances             $ 21,500,000  
Long-term Purchase Commitment, Period     5 years          
Federal home loan bank advances, long-term non-callable period     3 years          
Federal home loan Bank, advances, general debt obligations, disclosures, repayment and penalties     $ 0          
Federal home loan bank, advances, branch of FHLB Bank, interest rate (percent)             1.73%  
Expiration period   1 year            
Document Period End Date       Dec. 31, 2018        
Federal Home Loan Bank of Cincinnati                
Debt Instrument [Line Items]                
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances               $ 85,000,000.0
Federal home loan bank, advances, branch of FHLB Bank, interest rate (percent) 3.96%              
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate 15 years