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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | $ 8,980 | $ 8,961 | $ 18,164 | $ 18,270
Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 7,579 | 7,485 | 14,811 | 14,855
Not within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,401 | 1,476 | 3,353 | 3,415
Products and services transferred at a point in time | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 3,848 | 3,978 | 7,797 | 7,735
Products and services transferred over time | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 3,731 | 3,507 | 7,014 | 7,120
Non-interest Income | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 7,579 | 7,485 | 14,811 | 14,855
Trust management fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 3,498 | 3,462 | 6,589 | 6,865
Financial services fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 307 | 367 | 771 | 718
Interchange fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,928 | 1,921 | 3,938 | 3,895
Customer deposit fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,590 | 1,470 | 3,019 | 2,841
Other customer service fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | $ 256 | $ 265 | $ 494 | $ 536

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