Note 6 - Securities Available for Sale (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Gain (Loss) on Securities [Table Text Block]

	Less Than Twelve Months							Twelve Months or More							Total
(Dollars in thousands)	# of Investments		Fair Value		Unrealized Losses			# of Investments		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
March 31, 2024
Mortgage backed securities:
Federal National Mortgage Association (FNMA)		0	$	0		0			34	$	82,474		(9,625	)	$	82,474		(9,625	)
Federal Home Loan Mortgage Corporation (FHLMC)		0		0		0			24		70,254		(8,398	)		70,254		(8,398	)
Collateralized mortgage obligations:
FNMA		0		0		0			1		31		(2	)		31		(2	)
Other marketable securities:
U.S. Government agency obligations		5		24,874		(76	)		4		19,679		(321	)		44,553		(397	)
Total temporarily impaired securities		5	$	24,874		(76	)		63	$	172,438		(18,346	)	$	197,312		(18,422	)

	Less Than Twelve Months							Twelve Months or More							Total
(Dollars in thousands)	# of Investments		Fair Value		Unrealized Losses			# of Investments		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2023
Mortgage backed securities:
FNMA		0	$	0		0			34	$	87,133		(9,704	)	$	87,133		(9,704	)
FHLMC		0		0		0			24		74,249		(8,246	)		74,249		(8,246	)
Collateralized mortgage obligations:
FNMA		0		0		0			1		32		(2	)		32		(2	)
Other marketable securities:
U.S. government agency obligations		1		5,000		(9	)		7		34,456		(543	)		39,456		(552	)
Total temporarily impaired securities		1	$	5,000		(9	)		66	$	195,870		(18,495	)	$	200,870		(18,504	)

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

(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
March 31, 2024
Mortgage-backed securities:
FNMA	$	92,099		0		(9,625	)		82,474
FHLMC		78,652		0		(8,398	)		70,254
Collateralized mortgage obligations:
FNMA		33		0		(2	)		31
		170,784		0		(18,025	)		152,759
Other marketable securities:
U.S. Government agency obligations		54,221		26		(397	)		53,850
		54,221		26		(397	)		53,850
	$	225,005		26		(18,422	)		206,609
December 31, 2023
Mortgage-backed securities:
FNMA	$	96,837		0		(9,704	)		87,133
FHLMC		82,495		0		(8,246	)		74,249
Collateralized mortgage obligations:
FNMA		34		0		(2	)		32
		179,366		0		(17,952	)		161,414
Other marketable securities:
U.S. Government agency obligations		54,112		120		(552	)		53,680
		54,112		120		(552	)		53,680
	$	233,478		120		(18,504	)		215,094

Available-for-Sale Securities [Member]

Notes Tables

Contractual Obligation, Fiscal Year Maturity [Table Text Block]

(Dollars in thousands)	Amortized Cost		Fair Value
Due less than one year	$	64,284		60,418
Due after one year through five years		125,539		114,722
Due after five years through fifteen years		35,179		31,466
Due after fifteen years		3		3
Total	$	225,005		206,609