Note 5 - Securities (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

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

	As of March 31, 2015
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Costs		Gains		Losses			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	6,290	$	132	$	—		$	6,422
Obligations of state and political subdivisions		51,365		2,134		(8	)		53,491
Residential mortgage backed securities and collateralized mortgage obligations		41,603		415		(167	)		41,851
Corporate securities		31,128		578		(46	)		31,660
Commercial mortgage backed securities		6,808		47		(56	)		6,799
Other asset backed securities		26,572		278		(183	)		26,667
Total	$	163,766	$	3,584	$	(460	)	$	166,890
Held-to-maturity securities:
Obligations of state and political subdivisions	$	36,609	$	952	$	(336	)	$	37,225

	As of December 31, 2014
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Costs		Gains		Losses			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	6,351	$	58	$	(16	)	$	6,393
Obligations of state and political subdivisions		52,629		1,788		(54	)		54,363
Residential mortgage backed securities and collateralized mortgage obligations		46,727		457		(169	)		47,015
Corporate securities		37,392		475		(133	)		37,734
Commercial mortgage backed securities		10,402		60		(73	)		10,389
Other asset backed securities		30,896		393		(197	)		31,092
Total	$	184,397	$	3,231	$	(642	)	$	186,986
Held-to-maturity securities:
Obligations of state and political subdivisions	$	36,806	$	712	$	(400	)	$	37,118

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

	Available-For-Sale				Held-To-Maturity
(Amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Amounts maturing in:
One year or less	$	3,328	$	3,330	$	—	$	—
One year through five years		57,795		58,605		1,489		1,508
Five years through ten years		41,652		42,536		15,476		15,878
After ten years		60,991		62,419		19,644		19,839
Total	$	163,766	$	166,890	$	36,609	$	37,225

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

(Amounts in thousands)	Amount
Public funds collateral	$	24,721
Federal Home Loan Bank of San Francisco borrowings		20,177
Interest rate swap contracts		4,339
Total securities held for pledging purposes	$	49,237

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

	Three Months Ended March 31,
(Amounts in thousands)	2015			2014
Proceeds from sales of securities	$	25,215		$	36,686
Gross realized gains on sales of securities:
U.S. government & agencies	$	32		$	—
Obligations of state and political subdivisions		13			157
Residential mortgage backed securities and collateralized mortgage obligations		82			6
Corporate securities		4			141
Commercial mortgage backed securities		93			—
Other asset backed securities		—			23
Total gross realized gains on sales of securities		224			327
Gross realized losses on sales of securities:
Obligations of state and political subdivisions		—			(90	)
Residential mortgage backed securities and collateralized mortgage obligations		(9	)		(469	)
Commercial mortgage backed securities		—			(1	)
Other asset backed securities		—			(12	)
Total gross realized losses on sales of securities		(9	)		(572	)
Gain (loss) on investment securities, net	$	215		$	(245	)

Schedule of Unrealized Loss on Investments [Table Text Block]

	As of March 31, 2015
	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:
Obligations of states and political subdivisions	$	2,152	$	(8	)	$	—	$	—		$	2,152	$	(8	)
Residential mortgage backed securities and collateralized mortgage obligations		6,233		(70	)		5,242		(97	)		11,475		(167	)
Corporate securities		3,016		(15	)		3,777		(31	)		6,793		(46	)
Commercial mortgage backed securities		2,106		(10	)		1,986		(46	)		4,092		(56	)
Other asset backed securities		2,670		(6	)		6,045		(177	)		8,715		(183	)
Total temporarily impaired securities	$	16,177	$	(109	)	$	17,050	$	(351	)	$	33,227	$	(460	)
Held-to-maturity securities:
Obligations of states and political subdivisions	$	5,801	$	(62	)	$	5,291	$	(274	)	$	11,092	$	(336	)

	As of December 31, 2014
	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	$	—	$	—		$	1,269	$	(16	)	$	1,269	$	(16	)
Obligations of states and political subdivisions		3,952		(34	)		2,078		(20	)		6,030		(54	)
Residential mortgage backed securities and collateralized mortgage obligations		10,193		(66	)		5,365		(103	)		15,558		(169	)
Corporate securities		7,058		(36	)		6,542		(97	)		13,600		(133	)
Commercial mortgage backed securities		4,912		(14	)		1,542		(59	)		6,454		(73	)
Other asset backed securities		4,891		(16	)		6,088		(181	)		10,979		(197	)
Total temporarily impaired securities	$	31,006	$	(166	)	$	22,884	$	(476	)	$	53,890	$	(642	)
Held-to-maturity securities:
Obligations of states and political subdivisions	$	1,556	$	(14	)	$	12,726	$	(386	)	$	14,282	$	(400	)