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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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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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