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Note 8 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)		Dec. 31, 2021 USD ($)	Apr. 21, 2023 USD ($)	Dec. 31, 2020 USD ($)
Number of Reportable Segments	1
Goodwill	$ 143,946	$ 129,565	[1]	$ 129,565		$ 129,565
Goodwill, Acquired During Period	14,381	0		0
Finite-Lived Intangible Assets, Net	15,145
Amortization of Intangible Assets	$ 1,731	$ 1,446		$ 1,446
Core Deposits [Member]
Finite-Lived Intangible Assets, Remaining Amortization Period (Year)	8 years 5 months 1 day
Core Deposits [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	1 year 6 months
Core Deposits [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	9 years
Surrey [Member]
Goodwill					$ 14,381
Goodwill, Acquired During Period	$ 14,380
Surrey [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets, Net	$ 12,700
[1] Derived from audited financial statements

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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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