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BORROWED FUNDS - Short-term borrowings - Additional information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
BORROWED FUNDS |  |  |
Short-term Debt, Weighted Average Interest Rate, at Point in Time | 5.23% | 4.28% |
Short-term borrowings | $ 33,874,000 | $ 80,062,000 |
Line of Credit Facility, Maximum Month-end Outstanding Amount | 120,290,000 | 90,042,000 | $ 17,353,000
Other Assets [Member] |  |  |
BORROWED FUNDS |  |  |
Federal Home Loan Bank Stock | 6,252,000 |  |
Other Correspondent Banks |  |  |
BORROWED FUNDS |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 75,000,000 | 95,000,000 |
Long-term Line of Credit, Total | 0 | 0 |
Federal Reserve Bank of Philadelphia | Collateral Pledged |  |  |
BORROWED FUNDS |  |  |
Investment pledged as collateral | $ 20,829,000 | 24,113,000 |
Other short-term advances |  |  |
BORROWED FUNDS |  |  |
Short-term borrowings |  | $ 0 |
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 | $ 2,400,000 | $ 3,080,000 |
Short-term borrowings | 2,374,000 | 3,062,000 |
FHLB-Pittsburgh borrowings |  |  |
BORROWED FUNDS |  |  |
Short-term borrowings | 31,500,000 | 77,000,000 |
Federal Home Loan Bank of Pittsburgh |  |  |
BORROWED FUNDS |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 926,845,000 | 839,378,000 |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 1,323,008,000 | 1,209,179,000 |
Line of Credit Facility, Remaining Borrowing Capacity | 737,824,000 | 689,279,000 |
Federal Home Loan Bank of Pittsburgh | Other Assets [Member] |  |  |
BORROWED FUNDS |  |  |
Federal Home Loan Bank Stock | 15,214,000 | 14,168,000 |
Federal Home Loan Bank of Pittsburgh | Federal Reserve Bank of Philadelphia |  |  |
BORROWED FUNDS |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 19,982,000 | 23,107,000 |
Long-term Line of Credit, Total | $ 0 | $ 0 |
Federal Home Loan Bank of Pittsburgh | Overnight Borrowing |  |  |
BORROWED FUNDS |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 5.68% | 4.45% |
Short-term borrowings | $ 6,500,000 | $ 77,000,000 |
Federal Home Loan Bank of Pittsburgh | Federal Home Loan Bank Advances 1 |  |  |
BORROWED FUNDS |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 5.60% |  |
Federal Home Loan Bank of Pittsburgh | FHLB-Pittsburgh borrowings |  |  |
BORROWED FUNDS |  |  |
Short-term borrowings | $ 25,000,000 |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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