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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | $ 36,888 | $ 35,073 | $ 34,647
Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 30,540 | 29,451 | 29,364
Not within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 6,348 | 5,622 | 5,283
Products and services transferred at a point in time | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 15,757 | 15,751 | 15,552
Products and services transferred over time | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 14,783 | 13,700 | 13,812
Non-interest Income | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 30,540 | 29,451 | 29,364
Trust management fees | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 13,846 | 12,766 | 13,022
Financial services fees | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 1,855 | 1,517 | 1,551
Interchange fees | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 7,727 | 7,845 | 7,736
Customer deposit fees | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | 6,046 | 6,280 | 5,935
Other customer service fees | Within the scope of ASC 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total non-interest income | $ 1,066 | $ 1,043 | $ 1,120

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