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Postretirement Benefit Plans - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2008
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Other  
Postretirement Life Insurance      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, minimum service period requirement (in years) 10 years 20 years  
Life insurance coverage amount until age 65   $ 50  
Decrease in coverage amount after age 65   5  
Life insurance coverage amount   $ 5  
Defined Benefit Postretirement Health and Life Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, minimum service period requirement (in years) 10 years 20 years  
Defined benefit plan, coverage period (in years)   5 years  
Percentage increase in postretirement benefit health insurance reimbursable premium   36.79%  
Defined Benefit Postretirement Health and Life Benefit Plan | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Postretirement benefit health insurance reimbursable premium   $ 5  
Post-Retirement Health Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, minimum service period requirement (in years)   20 years  
Defined benefit plan, coverage period (in years)   5 years  
Post-Retirement Health Benefit Plan | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Postretirement benefit health insurance reimbursable premium   $ 5  
Defined Benefit Postretirement Health And Life Coverage      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, accumulated benefit obligation   226 $ 271
Director's Retirement Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, accumulated benefit obligation   0 1,300
Cash surrender value of bank owned life insurance   4,300 4,200
Scottdale Defined Benefit Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, accumulated benefit obligation   2,500 2,700
Settlement gains recognized   0 (4)
Scottdale Defined Benefit Pension Plan | Scottdale Bank and Trust Company      
Defined Benefit Plan Disclosure [Line Items]      
Settlement gains recognized   $ 0 322
Scottdale Defined Benefit Pension Plan | Minimum | Scottdale Bank and Trust Company | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of target portfolio allocation   30.00%  
Scottdale Defined Benefit Pension Plan | Minimum | Scottdale Bank and Trust Company | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of target portfolio allocation   40.00%  
Scottdale Defined Benefit Pension Plan | Maximum | Scottdale Bank and Trust Company | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of target portfolio allocation   20.00%  
Scottdale Defined Benefit Pension Plan | Maximum | Scottdale Bank and Trust Company | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of target portfolio allocation   50.00%  
Scottdale Defined Benefit Pension Plan | Maximum | Scottdale Bank and Trust Company | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of target portfolio allocation   60.00%  
Riverview Defined Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, accumulated benefit obligation   $ 5,700 $ 6,400