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Summary of Significant Accounting Policies (Details)
$ in Thousands
 12 Months Ended 39 Months Ended
Jan. 01, 2026
USD ($)
shares
Dec. 31, 2025
USD ($)
unit
segment
apartment
property
shop
nonbankSubsidiary
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Mar. 31, 2021
Number of nonbank subsidiaries | nonbankSubsidiary   6      
Number of reportable segments | segment   1      
Assets under management   $ 1,000,000      
Cash reserve balances   0 $ 0    
Accrued interest, after allowance for credit loss   1,800      
Held-to-maturity, at amortized cost (fair value $321,702 and $340,648)   347,285 382,447    
Held-to-maturity, accrued Interest, after allowance for credit loss   1,500      
Net loans   $ 405,300 $ 0    
Disposal Group, Not Discontinued Operation, Gain Loss On Disposal, Statement Of Income, Extensible List, Not Disclosed Flag   current operations current operations    
Bank premises and equipment held for sale   $ 475 $ 702    
Property written down value   $ 228      
Number of written down property | property   1      
Number of property available for sale | property   1      
Number of reporting units | unit   1      
Goodwill and intangible asset impairment   $ 0 $ 0 $ 0  
Finance Lease, Liability, Statement of Financial Position [Extensible List]   Long-term debt Long-term debt    
Core Deposit Intangible          
Core deposit intangible, amortization period (in years)   10 years      
Minimum | Customer Lists Intangible          
Core deposit intangible, amortization period (in years)   10 years      
Minimum | Buildings          
Property, plant and equipment, useful life (in years)   5 years      
Minimum | Furniture, fixtures, and equipment          
Property, plant and equipment, useful life (in years)   3 years      
Minimum | Land Improvements          
Property, plant and equipment, useful life (in years)   10 years      
Minimum | Leasehold improvements          
Property, plant and equipment, useful life (in years)   10 years      
Maximum | Core Deposit Intangible          
Core deposit intangible, amortization period (in years)   10 years      
Maximum | Customer Lists Intangible          
Core deposit intangible, amortization period (in years)   20 years      
Maximum | Buildings          
Property, plant and equipment, useful life (in years)   50 years      
Maximum | Furniture, fixtures, and equipment          
Property, plant and equipment, useful life (in years)   10 years      
Maximum | Land Improvements          
Property, plant and equipment, useful life (in years)   20 years      
Maximum | Leasehold improvements          
Property, plant and equipment, useful life (in years)   15 years      
Dauphin County, Pennsylvania          
Carrying value of investment in limited partnership   $ 2,900 $ 3,700    
Number of apartments under the project | apartment   37      
Limited partner capital contribution commitment   $ 7,600      
Commitment funding term (in years)         3 years
Project investment amortization period (in years)   10 years      
LIHTCs amount awarded for the project   $ 8,500      
Low income housing tax credit   753 753 753  
Mechanicsburg, Pennsylvania          
Carrying value of investment in limited partnership   $ 9,000 9,700    
Project investment amortization period (in years)   10 years      
LIHTCs amount awarded for the project   $ 12,000      
Low income housing tax credit   $ 773 1,100    
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]   Provision for income taxes      
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]   Provision for income taxes      
Schuylkill County, Pennsylvania          
Carrying value of investment in limited partnership   $ 2,700 3,100    
Number of apartments under the project | apartment   17      
Limited partner capital contribution commitment   $ 4,400      
Project investment amortization period (in years)   10 years      
LIHTCs amount awarded for the project   $ 4,800      
Low income housing tax credit   $ 442 484    
Number of shops under the project | shop   2      
Federal Home Loan Bank of Pittsburgh          
Other interest and dividend income   $ 443 1,300 864  
Equity securities          
Equity securities, fair value   5,400 428    
Equity securities sold   0 $ 0 $ 0  
Cumberland Advisors          
Assets under management   $ 3,200,000      
Cumberland Advisors | Subsequent Event          
Payments to acquire businesses $ 1,600        
Equity interest issued or issuable, number of shares (in shares) | shares 127,020