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ACQUISITIONS AND DIVESTITURES - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended
	Apr. 30, 2021 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jul. 31, 2021 USD ($) bankingCenter	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Noncontrolling interest			$ 975			$ 0
Goodwill			3,988			$ 2,350	$ 19,630	$ 18,480
Disposal group, disposed of by sale
Business Acquisition [Line Items]
Branch locations sold, number | bankingCenter					4
Deposits assumed					$ 163,300
Loans of branches held for sale					$ 57,800
Gain on sale of banking centers			$ 10,800	$ 10,800
Flexia
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners		20.00%
Trabian
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	20.00%
Flexia
Business Acquisition [Line Items]
Payments for software		$ 1,000
Flexia
Business Acquisition [Line Items]
Ownership interest		80.00%
Purchase consideration		$ 2,500
Noncontrolling interest		$ 500
Trabian
Business Acquisition [Line Items]
Ownership interest	80.00%
Purchase consideration	$ 1,600
Noncontrolling interest	400
Assets acquired	800
Liabilities assumed	700
Goodwill	1,600
Intangible assets assumed	$ 600

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