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Employee Benefit Plans - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
installment
shares
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award            
Options, outstanding (in shares) | shares 723,202   723,202   672,800  
Defined contribution plan, maximum annual contributions per employee, percent     75.00%      
Defined contribution plan employer discretionary contribution amount $ 199 $ 186 $ 459 $ 371    
Deferred compensation 388 30 516 522    
Interest paid on deferred fees 40 33 68 62    
Deferred compensation arrangement with individual, distributions paid 3 3 6 6    
Contributions 0   0      
Defined benefit plans future payments $ 3,845 3,708 $ 3,845 3,708 $ 3,845 $ 3,571
Director            
Share-based Compensation Arrangement by Share-based Payment Award            
Deferred compensation arrangement guaranteed award percentage     100.00%      
Executive Management            
Share-based Compensation Arrangement by Share-based Payment Award            
Deferred compensation arrangement guaranteed award percentage     100.00%      
SERP            
Share-based Compensation Arrangement by Share-based Payment Award            
Description of defined contribution pension and other postretirement plans     The retirement benefit under the SERP is an amount equal to sixty percent (60%) of the average of the President and CEO’s base salary for the thirty-six (36) months immediately preceding the executive’s separation from service after age 66, adjusted annually thereafter by two percent (2%)      
SERP | President and CEO            
Share-based Compensation Arrangement by Share-based Payment Award            
Percent of average executive base salary 60.00%   60.00%      
Payment term after separation     36 months      
Percent of average executive base salary, adjustment thereafter 2.00%   2.00%      
Number of annual payments after separation | installment     15      
Total estimated future payments $ 6,200   $ 6,200      
Discount rate used to calculate the present value of the benefit obligation 4.00%   4.00%      
Annual vesting percentage     3.00%      
Award vesting rights, percentage     100.00%      
Other Postretirement Benefits Plan | Executive Management            
Share-based Compensation Arrangement by Share-based Payment Award            
Deferred compensation arrangement guaranteed award percentage     7.50%      
Award vesting rights, percentage     100.00%      
Accrued expense under the plan $ 60   $ 60      
Life insurance plan with a post retirement death benefit 250   250      
Life insurance plan aggregate expenses 1 $ 1 $ 3 $ 3    
Other Postretirement Benefits Plan | Executive Management | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award            
Deferred compensation arrangement guaranteed award percentage     15.00%      
Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award            
Award vesting period     10 years      
Award expiration period     3 years      
Compensation cost not yet recognized 1,500   $ 1,500      
Compensation cost recognition weighted average period     2 years 1 month 6 days      
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award            
Award vesting period     4 years      
Canceled (in shares) | shares     (1,500)      
Compensation cost recognition weighted average period     2 years 9 months 18 days      
Nonvested awards, compensation not yet recognized, awards other than options $ 1,700   $ 1,700      
2019 Equity Compensation Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Number of shares available for grant (in shares) | shares 138,850   138,850      
2019 Equity Compensation Plan | Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award            
Number of shares available for grant (in shares) | shares 500,000   500,000      
Unvested options cancelled and returned | shares     (2,000)      
2019 Equity Compensation Plan | Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award            
Number of shares available for grant (in shares) | shares 83,150   83,150      
Canceled (in shares) | shares     (1,500)