The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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GOODWILL AND INTANGIBLE ASSETS - Changes in Core Deposits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite-lived Intangible Assets [Roll Forward]
Balance at beginning of period			$ 8,302
Less amortization	$ (453)	$ (453)	(1,359)	$ (1,379)
Balance at end of period	6,942		6,942		$ 8,302
Core Deposits [Member]
Finite-lived Intangible Assets [Roll Forward]
Balance at beginning of period			8,302	$ 9,185	9,185
Additions					949
Less amortization			(1,359)		(1,832)
Balance at end of period	$ 6,942		$ 6,942		$ 8,302