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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | $ 8,815 | $ 8,823 | $ 26,979 | $ 27,093
Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 7,448 | 7,384 | 22,259 | 22,239
Not within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,367 | 1,439 | 4,720 | 4,854
Products and services transferred at a point in time | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 4,045 | 4,020 | 11,842 | 11,755
Products and services transferred over time | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 3,403 | 3,364 | 10,417 | 10,484
Non-interest Income | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 7,448 | 7,384 | 22,259 | 22,239
Trust management fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 3,135 | 3,077 | 9,724 | 9,941
Financial services fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 387 | 471 | 1,158 | 1,190
Interchange fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,971 | 1,953 | 5,909 | 5,849
Customer deposit fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | 1,669 | 1,578 | 4,688 | 4,418
Other customer service fees | Within the scope of ASC 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total non-interest income | $ 286 | $ 305 | $ 780 | $ 841

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