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Note 4 - Investment Securities (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

																		Allowance
																		for
						Gross				Gross								Investment
		Amortized				Unrealized				Unrealized				Fair				Credit
		Cost				Gains				Losses				Value				Losses
		(dollars in thousands)
June 30, 2025
Investment securities available-for-sale:
Federal agency obligations		$	368,785			$	1,281			$	(10,649	)		$	359,417			$	-
Residential mortgage pass-through securities			677,879				2,612				(52,352	)			628,139				-
Commercial mortgage pass-through securities			30,266				36				(3,730	)			26,572				-
Obligations of U.S. states and political subdivisions			226,834				1,044				(20,752	)			207,126				-
Corporate bonds and notes			5,000				1				(6	)			4,995				-
Asset-backed securities			832				1				(10	)			823				-
Other securities			128				-				-				128				-
Total investment securities available-for-sale		$	1,309,724			$	4,975			$	(87,499	)		$	1,227,200			$	-
December 31, 2024
Investment securities available-for-sale:
Federal agency obligations		$	96,165			$	179			$	(11,674	)		$	84,670			$	-
Residential mortgage pass-through securities			439,445				211				(60,818	)			378,838				-
Commercial mortgage pass-through securities			24,989				-				(4,097	)			20,892				-
Obligations of U.S. states and political subdivisions			141,775				89				(19,460	)			122,404				-
Corporate bonds and notes			5,000				5				(18	)			4,987				-
Asset-backed securities			892				-				(7	)			885				-
Other securities			171				-				-				171				-
Total investment securities available-for-sale		$	708,437			$	484			$	(96,074	)		$	612,847			$	-

Investments Classified by Contractual Maturity Date [Table Text Block]

		June 30, 2025
		Amortized				Fair
		Cost				Value
		(dollars in thousands)
Investment securities available-for-sale:
Due in one year or less		$	5,034			$	5,036
Due after one year through five years			24,943				25,155
Due after five years through ten years			61,846				61,209
Due after ten years			509,628				480,961
Residential mortgage pass-through securities			677,879				628,139
Commercial mortgage pass-through securities			30,266				26,572
Other securities			128				128
Total investment securities available-for-sale		$	1,309,724			$	1,227,200

Unrealized Gain (Loss) on Investments [Table Text Block]

		June 30, 2025
		Total								Less than 12 Months								12 Months or Longer
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
		Value				Losses				Value				Losses				Value				Losses
		(dollars in thousands)
Investment securities available-for-sale:
Federal agency obligations		$	84,641			$	(10,649	)		$	50,658			$	(255	)		$	33,983			$	(10,394	)
Residential mortgage pass-through securities			350,770				(52,352	)			21,050				(377	)			329,720				(51,975	)
Commercial mortgage pass-through securities			21,131				(3,730	)			-				-				21,131				(3,730	)
Obligations of U.S. states and political subdivisions			115,530				(20,752	)			20,316				(925	)			95,214				(19,827	)
Corporate bonds and notes			1,994				(6	)			1,994				(6	)			-				-
Asset-backed securities			562				(10	)			-				-				562				(10	)
Total investment securities available for sale		$	574,628			$	(87,499	)		$	94,018			$	(1,563	)		$	480,610			$	(85,936	)

		December 31, 2024
		Total								Less than 12 Months								12 Months or Longer
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
		Value				Losses				Value				Losses				Value				Losses
		(dollars in thousands)
Investment securities available-for-sale:
Federal agency obligations		$	53,467			$	(11,674	)		$	18,471			$	(60	)		$	34,996			$	(11,614	)
Residential mortgage pass-through securities			364,971				(60,818	)			26,809				(604	)			338,162				(60,214	)
Commercial mortgage pass-through securities			20,892				(4,097	)			-				-				20,892				(4,097	)
Obligations of U.S. states and political subdivisions			112,523				(19,460	)			13,281				(322	)			99,242				(19,138	)
Corporate bonds and notes			1,982				(18	)			1,982				(18	)			-				-
Asset-backed securities			885				(7	)			-				-				885				(7	)
Total investment securities available for sale		$	554,720			$	(96,074	)		$	60,543			$	(1,004	)		$	494,177			$	(95,070	)

X

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

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