Note 3 - Securities (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	As of March 31, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Cost		Gain		Loss			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	41,261	$	270	$	(352	)	$	41,179
Obligations of state and political subdivisions		58,832		1,387		(811	)		59,408
Residential mortgage-backed securities and collateralized mortgage obligations		129,111		18		(3,562	)		125,567
Corporate securities		4,065		7		(114	)		3,958
Commercial mortgage-backed securities		26,261		12		(753	)		25,520
Other asset-backed securities		282		3		—			285
Total	$	259,812	$	1,697	$	(5,592	)	$	255,917

	As of December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Cost		Gain		Loss			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	40,319	$	196	$	(146	)	$	40,369
Obligations of state and political subdivisions		77,412		1,910		(478	)		78,844
Residential mortgage-backed securities and collateralized mortgage obligations		116,061		69		(1,538	)		114,592
Corporate securities		5,079		18		(105	)		4,992
Commercial mortgage-backed securities		26,995		24		(378	)		26,641
Other asset-backed securities		2,540		4		(28	)		2,516
Total	$	268,406	$	2,221	$	(2,673	)	$	267,954

Amortized Cost and Estimated Fair Value Available for Sale Securities [Table Text Block]

	Available-For-Sale
(Amounts in thousands)	Amortized Cost		Fair Value
Amounts maturing in:
One year or less	$	110	$	112
After one year through five years		84,710		83,229
After five years through ten years		88,333		86,912
After ten years		86,659		85,664
Total	$	259,812	$	255,917

Schedule of Realized Gain (Loss) [Table Text Block]

	Three Months Ended March 31,
(Amounts in thousands)	2018			2017
Proceeds from sales of securities	$	19,398		$	13,927
Gross realized gains on sales of securities:
Obligations of state and political subdivisions	$	152		$	51
Residential mortgage-backed securities and collateralized mortgage obligations		—			17
Corporate securities		—			1
Total gross realized gains on sales of securities		152			69
Gross realized losses on sales of securities:
Obligations of state and political subdivisions		(71	)		—
Corporate securities		—			(3	)
Other asset-backed securities		(45	)		—
Total gross realized losses on sales of securities		(116	)		(3	)
Gain on investment securities, net	$	36		$	66

Schedule of Unrealized Loss on Investments [Table Text Block]

	As of March 31, 2018
	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
(Amounts in thousands)	Value		Losses			Value		Losses			Value		Losses
Available-for-sale securities:
U.S. government & agencies	$	15,195	$	(286	)	$	2,003	$	(66	)	$	17,198	$	(352	)
Obligations of states and political subdivisions		17,412		(534	)		5,809		(277	)		23,221		(811	)
Residential mortgage-backed securities and collateralized mortgage obligations		88,513		(2,288	)		31,013		(1,274	)		119,526		(3,562	)
Corporate securities		—		—			2,920		(114	)		2,920		(114	)
Commercial mortgage-backed securities		13,965		(409	)		9,684		(344	)		23,649		(753	)
Total temporarily impaired securities	$	135,085	$	(3,517	)	$	51,429	$	(2,075	)	$	186,514	$	(5,592	)

	As of December 31, 2017
	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
(Amounts in thousands)	Value		Loss			Value		Loss			Value		Loss
Available-for-sale securities:
U.S. government & agencies	$	18,140	$	(102	)	$	2,131	$	(44	)	$	20,271	$	(146	)
Obligations of states and political subdivisions		15,030		(255	)		8,368		(223	)		23,398		(478	)
Residential mortgage-backed securities and collateralized mortgage obligations		75,323		(827	)		31,036		(711	)		106,359		(1,538	)
Corporate securities		—		—			2,934		(105	)		2,934		(105	)
Commercial mortgage-backed securities		11,162		(151	)		10,026		(227	)		21,188		(378	)
Other asset-backed securities		2,167		(28	)		—		—			2,167		(28	)
Total temporarily impaired securities	$	121,822	$	(1,363	)	$	54,495	$	(1,310	)	$	176,317	$	(2,673	)