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Note 2 - Acquisitions and Divestitures (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)
Goodwill, Ending Balance	$ 129,570	$ 129,565	$ 129,565	$ 92,750
Highlands Bankshares, Inc. [Member]
Business Combination, Stock Conversion Ratio	0.2703
Business Combination, Consideration Transferred, Total	$ 86,650
Goodwill, Ending Balance	$ 36,820

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The stock conversion ratio for a business combination.

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