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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 22,190	$ 21,523
Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues	10,748	9,766
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Revenues	11,442	11,757
Trust management fees
Disaggregation of Revenue [Line Items]
Revenues	11,098	11,017
Financial services fees
Disaggregation of Revenue [Line Items]
Revenues	966	968
Interchange fees
Disaggregation of Revenue [Line Items]
Revenues	4,899	4,434
Customer deposit fees
Disaggregation of Revenue [Line Items]
Revenues	4,281	3,800
Other customer service fees
Disaggregation of Revenue [Line Items]
Revenues	$ 946	$ 1,304

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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

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