Employee Benefit Plans (Narrative) (Details) - USD ($)	1 Months Ended			3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Discretionary contribution as percentage of employee's base pay				15.00%
Vesting period of employer discretionary contribution				2 years
Defined benefit plan participation expense				$ 15,757
Four Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer discretionary contribution	$ 126,058	$ 123,179	$ 119,252
Defined benefit plan participation expense				$ 12,007	$ 18,788
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				$ 1,000,000
COVID-19 [Member] | Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in market value of pension plan assets				$ (7,000,000)