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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Employee Benefit Plans [Abstract] |
Schedule of Net Funded Status | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Defined Benefit SERP
(in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Change in Benefit Obligation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Obligation at the beginning of the year | ​ | $ | 40,184 | ​ | $ | 54,931 | ​ | $ | 7,194 | ​ | $ | 10,395
Service cost | ​ | ​ | 25 | ​ | ​ | 57 | ​ | ​ | 102 | ​ | ​ | 165
Interest cost | ​ | ​ | 2,050 | ​ | ​ | 1,535 | ​ | ​ | 367 | ​ | ​ | 286
Change in discount rate and mortality assumptions | ​ | ​ | 314 | ​ | ​ | (11,930) | ​ | ​ | — | ​ | ​ | —
Actuarial losses/(gains) | ​ | ​ | 144 | ​ | ​ | (736) | ​ | ​ | 2,450 | ​ | ​ | (3,316)
Benefits paid | ​ | ​ | (2,103) | ​ | ​ | (3,673) | ​ | ​ | (336) | ​ | ​ | (336)
Obligation at the end of the year | ​ | ​ | 40,614 | ​ | ​ | 40,184 | ​ | ​ | 9,777 | ​ | ​ | 7,194
Change in Plan Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value at the beginning of the year | ​ | ​ | 48,185 | ​ | ​ | 59,696 | ​ | ​ | — | ​ | ​ | —
Actual return on plan assets | ​ | ​ | 5,740 | ​ | ​ | (7,838) | ​ | ​ | — | ​ | ​ | —
Employer contribution | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 336 | ​ | ​ | 336
Benefits paid | ​ | ​ | (2,103) | ​ | ​ | (3,673) | ​ | ​ | (336) | ​ | ​ | (336)
Fair value at the end of the year | ​ | ​ | 51,822 | ​ | ​ | 48,185 | ​ | ​ | — | ​ | ​ | —
Funded/(Unfunded) Status | ​ | $ | 11,208 | ​ | $ | 8,001 | ​ | $ | (9,777) | ​ | $ | (7,194)
Components of Net Periodic Pension Plan Cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Defined Benefit SERP
(in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Components of Net Pension Cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | $ | 25 | ​ | $ | 57 | ​ | $ | 102 | ​ | $ | 165
Interest cost | ​ | ​ | 2,050 | ​ | ​ | 1,535 | ​ | ​ | 367 | ​ | ​ | 286
Expected return on assets | ​ | ​ | (3,062) | ​ | ​ | (3,810) | ​ | ​ | — | ​ | ​ | —
Amortization of recognized loss | ​ | ​ | 998 | ​ | ​ | 1,117 | ​ | ​ | (7) | ​ | ​ | 271
Net pension (income)/expense in employee benefits | ​ | $ | 11 | ​ | $ | (1,101) | ​ | $ | 462 | ​ | $ | 722
Weighted Average Assumptions used to determine benefit obligations: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Discount rate for benefit obligations | ​ | ​ | 5.02% | ​ | ​ | 5.24% | ​ | ​ | 4.99% | ​ | ​ | 5.23%
Discount rate for net pension cost | ​ | ​ | 5.24% | ​ | ​ | 2.85% | ​ | ​ | — | ​ | ​ | —
Expected long-term return on assets | ​ | ​ | 6.50% | ​ | ​ | 6.50% | ​ | ​ | — | ​ | ​ | —
Rate of compensation increase | ​ | ​ | 3.00% | ​ | ​ | 3.00% | ​ | ​ | 3.00% | ​ | ​ | 3.00%
​
Schedule of Target Asset Allocations | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
Asset Class |  | Normalized Target |  | Range
Cash | ​ | 2% | ​ | 0% - 20%
Fixed Income | ​ | 43% | ​ | 30% - 50%
Equities | ​ | 55% | ​ | 45% - 65%
Actual Plan Asset Allocations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | Fair Value Hierarchy
(in thousands) |  | Assets at Fair Value |  | % of Portfolio |  | Level 1 |  | Level 2
Cash and cash equivalents | ​ | $ | 1,217 | ​ | 2.3% | ​ | $ | 1,217 | ​ | $ | —
Fixed income securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government and Agencies | ​ | ​ | 5,554 | ​ | 10.7% | ​ | ​ | — | ​ | ​ | 5,554
Taxable municipal bonds and notes | ​ | ​ | 2,503 | ​ | 4.8% | ​ | ​ | — | ​ | ​ | 2,503
Corporate bonds and notes | ​ | ​ | 10,258 | ​ | 19.8% | ​ | ​ | — | ​ | ​ | 10,258
Preferred stock | ​ | ​ | 276 | ​ | 0.5% | ​ | ​ | — | ​ | ​ | 276
Fixed income mutual funds | ​ | ​ | 3,302 | ​ | 6.4% | ​ | ​ | 3,302 | ​ | ​ | —
Total fixed income | ​ | ​ | 21,893 | ​ | 42.2% | ​ | ​ | 3,302 | ​ | ​ | 18,591
Equities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Large Cap | ​ | ​ | 19,780 | ​ | 38.2% | ​ | ​ | 19,780 | ​ | ​ | —
Mid Cap | ​ | ​ | 1,500 | ​ | 2.9% | ​ | ​ | 1,500 | ​ | ​ | —
Small Cap | ​ | ​ | 4,564 | ​ | 8.8% | ​ | ​ | 4,564 | ​ | ​ | —
International | ​ | ​ | 2,868 | ​ | 5.6% | ​ | ​ | 2,868 | ​ | ​ | —
Total equities | ​ | ​ | 28,712 | ​ | 55.5% | ​ | ​ | 28,712 | ​ | ​ | —
Total market value | ​ | $ | 51,822 | ​ | 100.0% | ​ | $ | 33,231 | ​ | $ | 18,591
Note: The Large cap equities includes 194,124 shares of First United Corporation common stock at December 31, 2023 and 2022
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | Fair Value Hierarchy
(in thousands) |  | Assets at Fair Value |  | % of Portfolio |  | Level 1 |  | Level 2
Cash and cash equivalents | ​ | $ | 985 | ​ | 2.0% | ​ | $ | 985 | ​ | $ | —
Fixed income securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government and Agencies | ​ | ​ | 2,770 | ​ | 5.8% | ​ | ​ | — | ​ | ​ | 2,770
Taxable municipal bonds and notes | ​ | ​ | 4,166 | ​ | 8.6% | ​ | ​ | — | ​ | ​ | 4,166
Corporate bonds and notes | ​ | ​ | 10,575 | ​ | 21.9% | ​ | ​ | — | ​ | ​ | 10,575
Preferred stock | ​ | ​ | 474 | ​ | 1.0% | ​ | ​ | — | ​ | ​ | 474
Fixed income mutual funds | ​ | ​ | 5,454 | ​ | 11.4% | ​ | ​ | 5,454 | ​ | ​ | —
Total fixed income | ​ | ​ | 23,439 | ​ | 48.7% | ​ | ​ | 5,454 | ​ | ​ | 17,985
Equities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Large Cap | ​ | ​ | 15,743 | ​ | 32.7% | ​ | ​ | 15,743 | ​ | ​ | —
Mid Cap | ​ | ​ | 1,225 | ​ | 2.5% | ​ | ​ | 1,225 | ​ | ​ | —
Small Cap | ​ | ​ | 3,815 | ​ | 7.9% | ​ | ​ | 3,815 | ​ | ​ | —
International | ​ | ​ | 2,978 | ​ | 6.2% | ​ | ​ | 2,978 | ​ | ​ | —
Total equities | ​ | ​ | 23,761 | ​ | 49.3% | ​ | ​ | 23,761 | ​ | ​ | —
Total market value | ​ | $ | 48,185 | ​ | 100.0% | ​ | $ | 30,200 | ​ | $ | 17,985
Expected Future Benefit Payments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Pension Plan |  | Defined Benefit SERP
2024 | ​ | $ | 2,217 | ​ | $ | 336
2025 | ​ | ​ | 2,267 | ​ | ​ | 336
2026 | ​ | ​ | 2,353 | ​ | ​ | 602
2027 | ​ | ​ | 2,401 | ​ | ​ | 655
2028 | ​ | ​ | 2,524 | ​ | ​ | 643
2029-2033 | ​ | ​ | 13,450 | ​ | ​ | 3,628
Schedule of Amounts that Will Be Amortized from Other Comprehensive Loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Pension |  | Defined Benefit SERP
Net actuarial loss | ​ | $ | 811 | ​ | $ | 157
​ | ​ | $ | 811 | ​ | $ | 157
​

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (d)(5) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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