v3.25.4
BORROWED FUNDS - Short-term borrowings - Additional information (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
BORROWED FUNDS      
Short-term Debt, Weighted Average Interest Rate, at Point in Time 3.73% 0.10%  
Short-term borrowings $ 28,618,000 $ 2,488,000  
FHLB-Pittsburgh facility included borrowed funds 28,618,000 61,936,000 $ 120,290,000
Other Assets [Member]      
BORROWED FUNDS      
Federal Home Loan Bank Stock 7,637,000 6,299,000  
Other Correspondent Banks      
BORROWED FUNDS      
Line of Credit Facility, Maximum Borrowing Capacity 75,000,000    
Long-term Line of Credit, Total 0 0  
Federal Reserve Bank of Philadelphia | Collateral Pledged      
BORROWED FUNDS      
Investment pledged as collateral $ 26,947,000 $ 18,881,000  
Customer repurchase agreements      
BORROWED FUNDS      
Debt, Weighted Average Interest Rate 0.10% 0.10%  
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned, Total $ 1,630,000 $ 2,500,000  
Short-term borrowings 1,618,000 2,488,000  
FHLB-Pittsburgh borrowings      
BORROWED FUNDS      
Short-term borrowings 27,000,000 0  
Federal Home Loan Bank of Pittsburgh      
BORROWED FUNDS      
Line of Credit Facility, Maximum Borrowing Capacity 971,946,000 938,691,000  
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 1,624,412,000 1,351,770,000  
Line of Credit Facility, Remaining Borrowing Capacity 785,822,000 749,999,000  
Short-term borrowings $ 27,000,000 0  
Overnight interest rate 3.93%    
Federal Home Loan Bank of Pittsburgh | Other Assets [Member]      
BORROWED FUNDS      
Federal Home Loan Bank Stock $ 18,724,000 15,018,000  
Federal Home Loan Bank of Pittsburgh | Federal Reserve Bank of Philadelphia      
BORROWED FUNDS      
Line of Credit Facility, Maximum Borrowing Capacity 25,484,000 18,093,000  
Long-term Line of Credit, Total $ 0 $ 0