Note 3 - Investment Securities Available-for-Sale (Tables)

6 Months Ended

Jun. 30, 2016

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

			Gross		Gross		Estimated
June 30, 2016	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. agency securities	$	37,981	$	789	$	69	$	38,701
Residential mortgage backed securities		258,406		2,709		231		260,884
Municipal bonds		98,835		5,788		1		104,622
Corporate bonds		5,009		-		40		4,969
Other equity investments		310		26		-		336
	$	400,541	$	9,312	$	341	$	409,512

			Gross		Gross		Estimated
December 31, 2015	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. agency securities	$	56,775	$	477	$	277	$	56,975
Residential mortgage backed securities		299,709		692		3,160		297,241
Municipal bonds		114,253		4,131		3		118,381
Corporate bonds		15,090		-		152		14,938
Other equity investments		307		27		-		334
	$	486,134	$	5,327	$	3,592	$	487,869

Schedule of Unrealized Loss on Investments [Table Text Block]

			Less than				12 Months
			12 Months				or Greater				Total
			Estimated				Estimated				Estimated
June 30, 2016	Number of		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Securities		Value		Losses		Value		Losses		Value		Losses
U. S. agency securities		5	$	6,798	$	69	$	-	$	-	$	6,798	$	69
Residential mortgage backed securities		20		14,956		33		23,512		198		38,468		231
Municipal bonds		1		2,500		1		-		-		2,500		1
Corporate bonds		2		3,702		30		1,267		10		4,969		40
		28	$	27,956	$	133	$	24,779	$	208	$	52,735	$	341

			Less than				12 Months
			12 Months				or Greater				Total
			Estimated				Estimated				Estimated
December 31, 2015	Number of		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Securities		Value		Losses		Value		Losses		Value		Losses
U. S. agency securities		13	$	32,927	$	277	$	-	$	-	$	32,927	$	277
Residential mortgage backed securities		92		157,871		1,438		58,954		1,722		216,825		3,160
Municipal bonds		2		1,559		3		-		-		1,559		3
Corporate bonds		4		14,938		152		-		-		14,938		152
		111	$	207,295	$	1,870	$	58,954	$	1,722	$	266,249	$	3,592

Available-for-sale Securities [Table Text Block]

	June 30, 2016				December 31, 2015
	Amortized		Estimated		Amortized		Estimated
(dollars in thousands)	Cost		Fair Value		Cost		Fair Value
U. S. agency securities maturing:
One year or less	$	19,550	$	19,603	$	31,436	$	31,361
After one year through five years		18,431		19,098		18,826		19,047
Five years through ten years		-		-		6,513		6,567
Residential mortgage backed securities		258,406		260,884		299,709		297,241
Municipal bonds maturing:
One year or less		4,303		4,320		4,450		4,478
After one year through five years		36,708		38,945		41,213		43,720
Five years through ten years		56,747		60,109		66,001		67,398
After ten years		1,077		1,248		2,589		2,785
Corporate bonds
After one year through five years		5,009		4,969		15,090		14,938
Other equity investments		310		336		307		334
	$	400,541	$	409,512	$	486,134	$	487,869

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details