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Note 2 - Securities (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

						Gross				Gross
		Amortized				Unrealized				Unrealized				Fair
(Dollars in thousands)		Cost				Gains				Losses				Value
2024
U.S. Government agency debt obligations		$	542,676			$	131			$	(47,226	)		$	495,581
Mortgage-backed securities			31,696				4				(6,332	)			25,368
Municipal general obligation bonds			187,484				513				(7,827	)			180,170
Municipal revenue bonds			31,066				89				(2,422	)			28,733
Other investments			500				0				0				500
		$	793,422			$	737			$	(63,807	)		$	730,352
2023
U.S. Government agency debt obligations		$	442,496			$	0			$	(52,000	)		$	390,496
Mortgage-backed securities			35,168				20				(5,715	)			29,473
Municipal general obligation bonds			172,126				1,924				(6,190	)			167,860
Municipal revenue bonds			30,708				262				(2,207	)			28,763
Other investments			500				0				0				500
		$	680,998			$	2,206			$	(66,112	)		$	617,092

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]

		Less than 12 Months								12 Months or More								Total
(Dollars in thousands)		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
Description of Securities		Value				Loss				Value				Loss				Value				Loss
2024
U.S. Government agency debt obligations		$	113,942			$	2,379			$	361,171			$	44,847			$	475,113			$	47,226
Mortgage-backed securities			194				1				24,865				6,331				25,059				6,332
Municipal general obligation bonds			63,387				1,117				92,153				6,710				155,540				7,827
Municipal revenue bonds			2,840				28				21,865				2,394				24,705				2,422
Other investments			0				0				0				0				0				0
		$	180,363			$	3,525			$	500,054			$	60,282			$	680,417			$	63,807
2023
U.S. Government agency debt obligations		$	0			$	0			$	390,496			$	52,000			$	390,496			$	52,000
Mortgage-backed securities			114				0				28,749				5,715				28,863				5,715
Municipal general obligation bonds			1,109				6				106,171				6,184				107,280				6,190
Municipal revenue bonds			1,506				8				20,602				2,199				22,108				2,207
Other investments			0				0				0				0				0				0
		$	2,729			$	14			$	546,018			$	66,098			$	548,747			$	66,112

Investments Classified by Contractual Maturity Date [Table Text Block]

		Amortized				Fair
(Dollars in thousands)		Cost				Value
Due in one year or less		$	57,905			$	56,773
Due from one to five years			325,614				304,620
Due from five to ten years			314,543				281,808
Due after ten years			63,164				61,283
Mortgage-backed securities			31,696				25,368
Other investments			500				500
		$	793,422			$	730,352

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