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Share-Based Compensation Plan (Details) - The 2018 LTIP - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized (in shares) 106,573   106,573     150,000
Compensation expense $ 155,000 $ 141,000 $ 352,000 $ 144,000    
Accrued dividends $ 21,377   $ 21,377   $ 9,533  
Restricted stock unit awards            
Number of Shares            
Unit awards, beginning balance (in shares)     13,733      
Granted (in shares)     14,376      
Vested (in shares)     (5,729)      
Forfeited (in shares)     (2,139)      
Unit awards, ending balance (in shares) 20,241   20,241      
Weighted Average Grant Date Fair Value per Share            
Unit awards, beginning balance (in dollars per share)     $ 43.00      
Granted (in dollars per share)     34.00      
Vested (in dollars per share)     43.00      
Forfeited (in dollars per share)     $ 38.42      
Aggregate grant date fair value awards issues     $ 500,000      
Unrecognized compensation cost $ 500,000   $ 500,000      
Period for recognition for remaining compensation cost     1 year 6 months      
Performance Unit Awards            
Number of Shares            
Unit awards, beginning balance (in shares)     3,966      
Granted (in shares)     8,094      
Performance factor decrease (in shares)     (185)      
Vested (in shares)     0      
Forfeited (in shares)     (1,545)      
Unit awards, ending balance (in shares) 10,330   10,330      
Weighted Average Grant Date Fair Value per Share            
Unit awards, beginning balance (in dollars per share)     $ 43.00      
Granted (in dollars per share)     34.00      
Performance factor decrease (in dollars per share)     43.00      
Vested (in dollars per share)     0      
Forfeited (in dollars per share)     $ 37.37      
Aggregate grant date fair value awards issues     $ 300,000      
Performance factor     47.50%      
Unrecognized compensation cost $ 300,000   $ 300,000      
Period for recognition for remaining compensation cost     2 years 4 months 24 days      
Performance Unit Awards | Awards Issued During 2019            
Weighted Average Grant Date Fair Value per Share            
Performance factor     100000.00%