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Employee Benefit Plans (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]              
Discretionary contribution, percent of participant's base salary           15.00%  
Vesting period of employer discretionary contribution           2 years  
Defined benefit plan participation expense       $ 14,906 $ 14,906 $ 29,812 $ 29,812
Four Employees [Member]              
Defined Benefit Plan Disclosure [Line Items]              
Vesting period of employer discretionary contribution 2 years 2 years 2 years        
Employer discretionary contribution $ 123,179 $ 119,252 $ 112,780        
Defined benefit plan participation expense       $ 18,788   $ 37,576  
Pension [Member]              
Defined Benefit Plan Disclosure [Line Items]              
Period of employment used to determine benefits           5 years  
Plan modification description           Effective April 30, 2010, the Pension Plan was amended, resulting in a "soft freeze", the effect of which prohibits new entrants into the plan and ceases crediting of additional years of service after that date. Effective January 1, 2013, the Pension Plan was amended to unfreeze it for those employees for whom the sum of their (a) ages, at their closest birthday plus (b) years of service for vesting purposes equals 80 or greater. The "soft freeze" continues to apply to all other plan participants. Pension benefits for these participants are managed through discretionary contributions to the First United Corporation 401(k) Profit Sharing Plan (the "401(k) Plan").  
Employer discretionary contribution           $ 2,000,000