BORROWED FUNDS - Long-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Long-term Borrowing
Long-term borrowings	$ 174,617	$ 138,337
Loans maturing in 2024 with a weighted-average rate of 2.96%
Long-term Borrowing
Rate	3.90%	3.90%
Loans maturing in 2025 with a weighted-average rate of 4.30%
Long-term Borrowing
Rate	4.30%	4.30%
Loans maturing in 2026 with a weighted-average rate of 4.61%
Long-term Borrowing
Rate	4.61%	4.61%
Loans maturing in 2027 with a weighted-average rate of 4.24%
Long-term Borrowing
Rate	4.24%	4.24%
Loans maturing in 2028 with a weighted-average rate of 4.30%
Long-term Borrowing
Rate	4.30%	4.30%
Loans maturing in 2029 with a weighted-average rate of 4.42%
Long-term Borrowing
Rate	4.42%	4.42%
Federal Home Loan Bank of Pittsburgh
Long-term Borrowing
Long-term borrowings	$ 174,617	$ 138,337
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2024 with a weighted-average rate of 2.96%
Long-term Borrowing
Long-term borrowings	9,138	32,161
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2025 with a weighted-average rate of 4.30%
Long-term Borrowing
Long-term borrowings	44,544	44,627
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2026 with a weighted-average rate of 4.61%
Long-term Borrowing
Long-term borrowings	48,018	35,518
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2027 with a weighted-average rate of 4.24%
Long-term Borrowing
Long-term borrowings	34,571	24,031
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2028 with a weighted-average rate of 4.30%
Long-term Borrowing
Long-term borrowings	26,027	2,000
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2029 with a weighted-average rate of 4.42%
Long-term Borrowing
Long-term borrowings	$ 12,319	$ 0