Note 4 - Investment Securities Available-for-sale (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

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

			Gross		Gross		Estimated
June 30, 2014	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. Government agency securities	$	43,772	$	715	$	99	$	44,388
Residential mortgage backed securities		222,289		1,715		3,101		220,903
Municipal bonds		109,471		4,347		506		113,312
Other equity investments		396		-		9		387
	$	375,928	$	6,777	$	3,715	$	378,990

			Gross		Gross		Estimated
December 31, 2013	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. Government agency securities	$	46,640	$	843	$	148	$	47,335
Residential mortgage backed securities		234,206		1,143		6,675		228,674
Municipal bonds		102,423		2,017		2,700		101,740
Other equity investments		396		-		12		384
	$	383,665	$	4,003	$	9,535	$	378,133

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than				12 Months
	12 Months				or Greater				Total
	Estimated				Estimated				Estimated
June 30, 2014	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	2,015	$	5	$	4,774	$	94	$	6,789	$	99
Residential mortgage backed securities		25,330		125		100,557		2,976		125,887		3,101
Municipal bonds		7,304		42		20,044		464		27,348		506
Other equity investments		169		9		-		-		169		9
	$	34,818	$	181	$	125,375	$	3,534	$	160,193	$	3,715

	Less than				12 Months
	12 Months				or Greater				Total
	Estimated				Estimated				Estimated
December 31, 2013	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	4,782	$	148	$	-	$	-	$	4,782	$	148
Residential mortgage backed securities		155,475		5,992		15,658		683		171,133		6,675
Municipal bonds		50,450		2,512		3,196		188		53,646		2,700
Other equity investments		-		-		165		12		165		12
	$	210,707	$	8,652	$	19,019	$	883	$	229,726	$	9,535

Available-for-sale Securities [Table Text Block]

	June 30, 2014				December 31, 2013
	Amortized		Estimated		Amortized		Estimated
(dollars in thousands)	Cost		Fair Value		Cost		Fair Value
U. S. Government agency securities maturing:
One year or less	$	8,003	$	8,014	$	19,025	$	19,133
After one year through five years		29,290		29,811		27,615		28,202
Five years through ten years		6,479		6,563		-		-
Residential mortgage backed securities		222,289		220,903		234,206		228,674
Municipal bonds maturing:
After one year through five years		39,300		40,933		25,718		26,008
Five years through ten years		66,561		68,577		76,705		75,732
Ten years through fifteen years		3,610		3,802		-		-
Other equity investments		396		387		396		384
	$	375,928	$	378,990	$	383,665	$	378,133