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REVENUE RECOGNITION - Summary of Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 1,510		$ 1,081	$ 4,208	$ 2,705
Noninterest income (out-of-scope of Topic 606)	4,009		2,873	9,862	8,838
Total noninterest income	5,519	$ 4,170	3,954	14,070	11,543
Deposit service fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	913		648	2,548	1,607
Debit card fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	451		384	1,333	941
Other
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 146		$ 49	$ 327	$ 157

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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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Amount, including 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.

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