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

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

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

			Gross			Gross		Estimated
June 30, 2015	Amortized		Unrealized			Unrealized		Fair
(dollars in thousands)	Cost		Gains			Losses		Value
U. S. Government agency securities	$	59,360	$	637	#	$	294	$	59,703
Residential mortgage backed securities		256,196		1,517			2,050		255,663
Municipal bonds		90,593		2,872			627		92,838
Corporate bonds		15,100		-			59		15,041
Other equity investments		396		68			-		464
	$	421,645	$	5,094		$	3,030	$	423,709

			Gross			Gross		Estimated
December 31, 2014	Amortized		Unrealized			Unrealized		Fair
(dollars in thousands)	Cost		Gains			Losses		Value
U. S. Government agency securities	$	29,434	$	500	#	$	40	$	29,894
Residential mortgage backed securities		241,120		1,716			2,516		240,320
Municipal bonds		106,983		4,850			121		111,712
Other equity investments		396		21			-		417
	$	377,933	$	7,087		$	2,677	$	382,343

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than				12 Months
	12 Months				or Greater				Total
	Estimated				Estimated				Estimated
June 30, 2015	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	25,511	$	294	$	-	$	-	$	25,511	$	294
Residential mortgage backed securities		59,378		425		70,155		1,625		129,533		2,050
Municipal bonds		31,814		627		-		-		31,814		627
Corporate bonds		11,307		59		-		-		11,307		59
	$	128,010	$	1,405	$	70,155	$	1,625	$	198,165	$	3,030

	Less than				12 Months
	12 Months				or Greater				Total
	Estimated				Estimated				Estimated
December 31, 2014	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	2,001	$	7	$	1,750	$	33	$	3,751	$	40
Residential mortgage backed securities		49,644		221		86,028		2,295		135,672		2,516
Municipal bonds		4,974		14		10,915		107		15,889		121
	$	56,619	$	242	$	98,693	$	2,435	$	155,312	$	2,677

Available-for-sale Securities [Table Text Block]

	June 30, 2015				December 31, 2014
	Amortized		Estimated		Amortized		Estimated
(dollars in thousands)	Cost		Fair Value		Cost		Fair Value
U. S. Government agency securities maturing:
One year or less	$	30,957	$	30,813	$	2,998	$	3,051
After one year through five years		21,905		22,266		19,947		20,276
Five years through ten years		6,498		6,624		6,489		6,567
Residential mortgage backed securities		256,196		255,663		241,120		240,320
Municipal bonds maturing:
One year or less		1,530		1,534		2,410		2,438
After one year through five years		39,733		41,838		47,038		49,607
Five years through ten years		44,028		44,081		54,983		56,927
After ten years		5,302		5,385		2,552		2,740
Corporate bonds
After one year through five years		15,100		15,041		-		-
Other equity investments		396		464		396		417
	$	421,645	$	423,709	$	377,933	$	382,343

- 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