Note 5 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

Schedule of Investment Securities Available-for-sale and Held-to-Maturity [Table Text Block]

	Available-for-Sale
	March 31 , 201 6
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	128,972	$	1,136	$	(172	)	$	129,936
Commercial		52,117		172		(549	)		51,740
Obligations of states and political subdivisions		14,049		922		(1	)		14,970
Obligations of U.S. government-sponsored agencies		2,000		—		(4	)		1,996
Corporate notes		774		—		(8	)		766
U.S. Treasury securities		80		—		—			80
Total	$	197,992	$	2,230	$	(734	)	$	199,488

	Held-to-Maturity
	March 31 , 201 6
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	18,205	$	34	$	(56	)	$	18,183
Obligations of U.S. government-sponsored agencies		11,556		31		(8	)		11,579
Obligations of states and political subdivisions		2,217		25		(1	)		2,241
Total	$	31,978	$	90	$	(65	)	$	32,003

	Available-for-Sale
	December 31, 201 5
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	135,104	$	998	$	(608	)	$	135,494
Commercial		45,961		164		(616	)		45,509
Obligations of states and political subdivisions		14,071		931		(4	)		14,998
Obligations of U.S. government-sponsored agencies		1,999		—		(17	)		1,982
Corporate notes		780		—		—			780
U.S. Treasury securities		80		—		—			80
Total	$	197,995	$	2,093	$	(1,245	)	$	198,843

	Held-to-Maturity
	December 31, 201 5
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	16,321	$	33	$	(170	)	$	16,184
Obligations of U.S. government-sponsored agencies		13,766		19		(71	)		13,714
Obligations of states and political subdivisions		2,272		18		(4	)		2,286
Total	$	32,359	$	70	$	(245	)	$	32,184

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available-for-Sale				Held-to-Maturity
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Maturing within one year	$	2,119	$	2,135	$	—	$	—
Maturing after one to five years		4,762		4,921		2,271		2,294
Maturing after five to ten years		114,008		114,795		9,852		9,879
Maturing after ten years		77,103		77,637		19,855		19,830
Total	$	197,992	$	199,488	$	31,978	$	32,003

Schedule of Unrealized Loss on Investments [Table Text Block]

	Available-for-Sale
	March 31 , 201 6
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	44,994	$	(128	)	$	5,321	$	(44	)
Commercial		24,822		(107	)		13,515		(442	)
Obligations of U.S. government-sponsored agencies		1,996		(4	)		—		—
Corporate notes		766		(8	)		—		—
Obligations of states and political subdivisions		446		(1	)		—		—
Total	$	73,024	$	(248	)	$	18,836	$	(486	)

	Held-to-Maturity
	March 31 , 201 6
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	13,557	$	(56	)	$	—	$	—
Obligations of U.S. government-sponsored agencies		1,579		(8	)		—		—
Obligations of states and political subdivisions		572		(1	)		—		—
Total	$	15,708	$	(65	)	$	—	$	—

	Available-for-Sale
	December 31, 201 5
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	83,403	$	(458	)	$	9,061	$	(150	)
Commercial		24,337		(272	)		8,918		(344	)
Obligations of U.S. government-sponsored agencies		1,982		(17	)		—		—
Corporate notes		779		—			—		—
Obligations of states and political subdivisions		707		(4	)		—		—
Total	$	111,208	$	(751	)	$	17,979	$	(494	)

	Held-to-Maturity
	December 31, 201 5
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	14,143	$	(170	)	$	—	$	—
Obligations of U.S. government-sponsored agencies		11,163		(44	)		1,560		(27	)
Obligations of states and political subdivisions		572		(4	)		—		—
Total	$	25,878	$	(218	)	$	1,560	$	(27	)