Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2008	Dec. 31, 2023	Dec. 31, 2022	Oct. 01, 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
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Other	Other
Postretirement Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, minimum service period requirement	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	10 years	20 years
Defined benefit plan, coverage period		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		20 years
Defined benefit plan, coverage period		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		271	$ 297
Director's Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation		1,300	1,300	$ 1,300
Cash surrender value of bank owned life insurance		4,200	4,100
Scottdale Defined Benefit Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation		2,700	3,800
Settlement gains recognized		(4)	0
Scottdale Defined Benefit Pension Plan | Scottdale Bank and Trust Company
Defined Benefit Plan Disclosure [Line Items]
Settlement gains recognized		$ 322	0
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		$ 6,400	$ 6,400