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Employee Benefit Plans (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Discretionary contribution as percentage of employee's base pay |  |  |  |  |  | 15.00% |
Defined contribution plan consecutive years of service to be completed by participant |  |  |  |  |  | 2 years |
Defined benefit plan participants compensation expense |  |  |  | $ 15,757 |  | $ 47,272 |
Period to refrain from engaging in competitive employment following separation from service |  |  |  |  |  | 3 years |
Four Employees [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer discretionary contribution | $ 126,058 | $ 123,179 | $ 119,252 |  |  |  |
Vesting period of employer discretionary contribution |  |  |  |  |  | 2 years |
Defined benefit plan participants compensation expense |  |  |  | $ 12,007 | $ 14,906 | $ 36,020 | $ 44,719
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 |  |  |  |  |  | $ 1,000,000.0 |

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- Definition Defined Contribution Plan Consecutive Years Of Service To Be Completed By Participant + References No definition available. + Details
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- Definition Period Of Employment Used To Determine Benefits + References No definition available. + Details
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- Definition Period To Refrain From Engaging In Competitive Employment Following Separation From Service + References No definition available. + Details
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- Definition Represents the vesting period of a discretionary contribution to benefit plan on the part of employer. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Description of modification of award under share-based payment arrangement. Includes, but is not limited to, terms for expiration date, vesting rights and exercise price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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