Note 3 - Investment Securities Available for Sale (Tables)

6 Months Ended

Jun. 30, 2013

Investments, Debt and Equity Securities [Abstract]

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

			Gross		Gross		Estimated
June 30, 2013	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. Government agency securities	$	38,818	$	832	$	152	$	39,498
Residential mortgage backed securities		211,079		1,491		4,131		208,439
Municipal bonds		86,982		2,599		2,112		87,469
Other equity investments		412		-		39		373
	$	337,291	$	4,922	$	6,434	$	335,779

			Gross		Gross		Estimated
December 31, 2012	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
U. S. Government agency securities	$	47,606	$	1,477	$	1	$	49,082
Residential mortgage backed securities		170,649		2,730		296		173,083
Municipal bonds		72,050		5,314		51		77,313
Other equity investments		407		-		65		342
	$	290,712	$	9,521	$	413	$	299,820

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or Greater				Total
	Estimated				Estimated				Estimated
June 30, 2013	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	10,323	$	152	$	-	$	-	$	10,323	$	152
Residential mortgage backed securities		139,445		4,131		-		-		139,445		4,131
Municipal bonds		36,863		2,103		484		9		37,347		2,112
Other equity investments		-		-		138		39		138		39
	$	186,631	$	6,386	$	622	$	48	$	187,253	$	6,434

	Less than 12 Months				12 Months or Greater				Total
	Estimated				Estimated				Estimated
December 31, 2012	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
U. S. Government agency securities	$	2,999	$	1	$	-	$	-	$	2,999	$	1
Residential mortgage backed securities		44,992		263		2,743		33		47,735		296
Municipal bonds		3,964		51		-		-		3,964		51
Other equity investments		-		-		112		65		112		65
	$	51,955	$	315	$	2,855	$	98	$	54,810	$	413

Available-for-sale Securities [Table Text Block]

	June 30, 2013				December 31, 2012
(dollars in thousands)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
U. S. Government agency securities maturing:
One year or less	$	9,035	$	9,059	$	5,038	$	5,053
After one year through five years		29,783		30,439		42,568		44,029
Residential mortgage backed securities		211,079		208,439		170,649		173,083
Municipal bonds maturing:
After one year through five years		16,642		16,964		11,469		11,978
Five years through ten years		70,340		70,505		60,581		65,335
Other equity investments		412		373		407		342
	$	337,291	$	335,779	$	290,712	$	299,820