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NON-INTEREST INCOME - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 5,684 | $ 5,469 | $ 10,606 | $ 10,655
Trust management fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,794 | 2,807 | 5,319 | 5,547
Financial services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 272 | 315 | 505 | 536
Interchange fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,213 | 1,107 | 2,244 | 2,131
Customer deposit fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,026 | 1,019 | 1,933 | 1,998
Other customer service fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 379 | $ 221 | $ 605 | $ 443

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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