Employee Benefit Plans (Components of the Net Periodic Pension Plan Cost) (Pension) (Details) - USD ($)	1 Months Ended		3 Months Ended			6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Discretionary contribution, percent of participant's base salary						15.00%
Two Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer discretionary contribution		$ 63,500	$ 7,943		$ 7,943
Defined benefit plan participation expense						$ 15,885	$ 15,885
Four Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer discretionary contribution	$ 112,708		14,089
Defined benefit plan participation expense						28,177
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost			70,000		76,000	140,000	152,000
Interest cost			412,000		435,000	825,000	870,000
Expected return on assets			(751,000)		(708,000)	(1,502,000)	(1,381,000)
Amortization of transition asset			0		0	0	0
Amortization of net actuarial loss			264,000		212,000	528,000	424,000
Amortization of prior service cost			3,000		3,000	6,000	6,000
Net pension expense/(credit) included in employee benefits			$ (2,000)		$ 18,000	$ (3,000)	$ 71,000
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 (a) their 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				$ 3,000,000