BORROWED FUNDS - Long-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-term Borrowing
Long-term borrowings	$ 125,276	$ 62,347
Rate	4.12%	4.12%
Loan maturing in 2023 with a rate of 3.25%
Long-term Borrowing
Rate	3.25%	3.25%
Loans maturing in 2024 with a weighted-average rate of 2.89%
Long-term Borrowing
Rate	2.89%	2.89%
Loans maturing in 2026 with a weighted-average rate of 4.30%
Long-term Borrowing
Rate	4.44%	4.44%
Loans maturing in 2027 with a weighted-average rate of 4.00%
Long-term Borrowing
Rate	4.00%	4.00%
Loan maturing in 2028 with a rate of 3.72%
Long-term Borrowing
Rate	3.72%	3.72%
Federal Home Loan Bank of Pittsburgh
Long-term Borrowing
Long-term borrowings	$ 125,276	$ 62,347
Federal Home Loan Bank of Pittsburgh | Loan maturing in 2023 with a rate of 3.25%
Long-term Borrowing
Long-term borrowings	2,290	9,303
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2024 with a weighted-average rate of 2.89%
Long-term Borrowing
Long-term borrowings	29,784	29,813
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2025 with a weighted-average rate of 4.05%
Long-term Borrowing
Long-term borrowings	35,653	23,231
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2026 with a weighted-average rate of 4.30%
Long-term Borrowing
Long-term borrowings	31,518	0
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2027 with a weighted-average rate of 4.00%
Long-term Borrowing
Long-term borrowings	24,031	0
Federal Home Loan Bank of Pittsburgh | Loan maturing in 2028 with a rate of 3.72%
Long-term Borrowing
Long-term borrowings	$ 2,000	$ 0