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Post-Retirement Benefits (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) item | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Post-Retirement Benefits |  |  |
Number of post-retirement health and life insurance benefit plans | item | 3 |  |
SCBT Post-retirement Benefit Plan |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | $ 157,000 | $ 195,000 | $ 209,000
Interest cost | $ 7,000 | $ 4,000 | $ 3,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Actuarial (gain) loss | $ (14,000) | $ (14,000) | $ 11,000
Benefits paid | (25,000) | (28,000) | (28,000)
Benefit obligation at end of year | 125,000 | 157,000 | 195,000
Change in plan assets: |  |  |
Employer contribution | 25,000 | 28,000 | 28,000
Benefits paid | (25,000) | (28,000) | (28,000)
Funded status | $ (125,000) | $ (157,000) | $ (195,000)
Weighted-average assumptions used to determine the benefit obligation |  |  |
Discount rate (as a percent) | 4.60% | 4.80% | 2.10%
Weighted-average assumptions used to determine net periodic pension cost |  |  |
Discount rate (as a percent) | 4.80% | 2.10% | 1.60%
Assumed health care cost trend rates |  |  |
Health care cost trend rate assumed for next fiscal year (as a percent) | 5.00% | 5.00% | 5.00%
Components of net periodic pension cost and other amounts recognized in other comprehensive (loss) income |  |  |
Interest cost | $ 7,000 | $ 4,000 | $ 3,000
Recognized net actuarial loss |  | 1,000 |
Net periodic pension expense | $ 7,000 | $ 5,000 | $ 3,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible List] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Net (gain) loss | $ (14,000) | $ (14,000) | $ 11,000
Amortization of loss |  | $ (1,000) |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Total amount recognized in other comprehensive income | $ (14,000) | $ (15,000) | $ 11,000
Total recognized in net periodic benefit cost and other comprehensive income | (7,000) | (10,000) | 14,000
Estimated net loss for the retiree medical plan that will be amortized from other comprehensive income into periodic benefit cost over the next fiscal year |  |  |
Estimated net gain/loss for the plan that will be amortized from other comprehensive income into periodic benefit cost over the next fiscal year | 0 |  |
Estimated future benefit payments (including expected future service as appropriate) |  |  |
2024 | 22,000 |  |
2025 | 20,000 |  |
2026 | 18,000 |  |
2027 | 16,000 |  |
2028 | 14,000 |  |
2029-2033 | 45,000 |  |
Estimated future benefit payments | 135,000 |  |
Expected contributions in the next fiscal year |  |  |
Amount of expected contributions in the next fiscal year | 22,000 |  |
FFCH Post-retirement Benefit Plan |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 2,508,000 | 1,754,000 | 2,070,000
Interest cost | $ 112,000 | $ 35,000 | $ 31,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Actuarial (gain) loss | $ (1,428,000) | $ 1,124,000 | $ (110,000)
Benefits paid | (179,000) | (416,000) | (246,000)
Less: Federal subsidy on benefits paid | 4,000 | 11,000 | 9,000
Benefit obligation at end of year | 1,017,000 | 2,508,000 | 1,754,000
Change in plan assets: |  |  |
Employer contribution | 175,000 | 405,000 | 236,000
Participants' contributions | 4,000 | 11,000 | 10,000
Benefits paid | (179,000) | (416,000) | (246,000)
Funded status | $ (1,017,000) | $ (2,508,000) | $ (1,754,000)
Weighted-average assumptions used to determine the benefit obligation |  |  |
Discount rate (as a percent) | 4.60% | 4.80% | 2.10%
Weighted-average assumptions used to determine net periodic pension cost |  |  |
Discount rate (as a percent) | 4.80% | 2.10% | 1.60%
Assumed health care cost trend rates |  |  |
Health care cost trend rate assumed for next fiscal year (as a percent) | 5.00% | 5.00% | 5.00%
Components of net periodic pension cost and other amounts recognized in other comprehensive (loss) income |  |  |
Interest cost | $ 112,000 | $ 35,000 | $ 31,000
Recognized net actuarial loss | 285,000 | 141,000 | 174,000
Net periodic pension expense | $ 397,000 | $ 176,000 | $ 205,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible List] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Net (gain) loss | $ (1,428,000) | $ 1,124,000 | $ (110,000)
Amortization of loss | $ (285,000) | $ (141,000) | $ (174,000)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Total amount recognized in other comprehensive income | $ (1,713,000) | $ 983,000 | $ (284,000)
Total recognized in net periodic benefit cost and other comprehensive income | (1,316,000) | $ 1,159,000 | $ (79,000)
Estimated net loss for the retiree medical plan that will be amortized from other comprehensive income into periodic benefit cost over the next fiscal year |  |  |
Estimated net gain/loss for the plan that will be amortized from other comprehensive income into periodic benefit cost over the next fiscal year | 45,000 |  |
Estimated future benefit payments (including expected future service as appropriate) |  |  |
2024 | 149,000 |  |
2025 | 140,000 |  |
2026 | 129,000 |  |
2027 | 119,000 |  |
2028 | 108,000 |  |
2029-2033 | 386,000 |  |
Estimated future benefit payments | 1,031,000 |  |
Expected contributions in the next fiscal year |  |  |
Amount of expected contributions in the next fiscal year | 149,000 |  |
Georgia Bank & Trust Retiree Medical Plan [Member] |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at end of year | $ 1,000 |  |

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