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Note 3 - Debt Securities - Available For Sale Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Securities available for sale, less than 12 months, fair value	$ 268,457	$ 24,011
Securities available for sale, less than 12 months, unrealized losses	(15,556)	(269)
Securities available for sale, 12 months or longer, fair value	20,794	8,843
Securities available for sale, 12 months or longer, unrealized losses	(4,242)	(423)
Securities available for sale, total fair value	289,251	32,854
Securities available for sale, total unrealized losses	(19,798)	(692)
US Government Agencies Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	1,485	0
Securities available for sale, less than 12 months, unrealized losses	(15)	0
Securities available for sale, 12 months or longer, fair value	0	459
Securities available for sale, 12 months or longer, unrealized losses	0	(3)
Securities available for sale, total fair value	1,485	459
Securities available for sale, total unrealized losses	(15)	(3)
US Treasury Securities [Member]
Securities available for sale, less than 12 months, fair value	157,264
Securities available for sale, less than 12 months, unrealized losses	(4,353)
Securities available for sale, 12 months or longer, fair value	0
Securities available for sale, 12 months or longer, unrealized losses	0
Securities available for sale, total fair value	157,264
Securities available for sale, total unrealized losses	(4,353)
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	12,347	0
Securities available for sale, less than 12 months, unrealized losses	(192)	0
Securities available for sale, 12 months or longer, fair value	0	0
Securities available for sale, 12 months or longer, unrealized losses	0	0
Securities available for sale, total fair value	12,347	0
Securities available for sale, total unrealized losses	(192)	0
Corporate Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	32,368	9,919
Securities available for sale, less than 12 months, unrealized losses	(2,172)	(16)
Securities available for sale, 12 months or longer, fair value	2,489	0
Securities available for sale, 12 months or longer, unrealized losses	(17)	0
Securities available for sale, total fair value	34,857	9,919
Securities available for sale, total unrealized losses	(2,189)	(16)
Mortgage-backed Agency Securities [Member]
Securities available for sale, less than 12 months, fair value	64,993	14,092
Securities available for sale, less than 12 months, unrealized losses	(8,824)	(253)
Securities available for sale, 12 months or longer, fair value	18,305	8,384
Securities available for sale, 12 months or longer, unrealized losses	(4,225)	(420)
Securities available for sale, total fair value	83,298	22,476
Securities available for sale, total unrealized losses	$ (13,049)	$ (673)

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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