Note 3 - Loans (Details) - Age Of The Recorded Investment In Loans By Portfolio (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 24,036	$ 2,497
60-89 Days Past Due	6,425	4,634
Greater Than 90 Days	10,537	24,217
Total Past Due	40,998	31,348
Current	1,140,539	1,072,130
Loans	1,181,537	1,103,478	1,097,588
Recorded Investment 90 Days and Accruing	0	0
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	4,266	2,233
60-89 Days Past Due	4,442	817
Greater Than 90 Days	1,410	1,308
Total Past Due	10,118	4,358
Current	428,720	379,547
Loans	438,838	383,905	376,173
Recorded Investment 90 Days and Accruing	0	0
Real Estate Mortgage Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	71	0
60-89 Days Past Due	0	0
Greater Than 90 Days	133	239
Total Past Due	204	239
Current	36,609	36,667
Loans	36,813	36,906
Recorded Investment 90 Days and Accruing	0	0
Real Estate Mortgage Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	19,687	114
60-89 Days Past Due	1,974	3,817
Greater Than 90 Days	8,994	18,141
Total Past Due	30,655	22,072
Current	665,087	643,502
Loans	695,742	665,574
Recorded Investment 90 Days and Accruing	0	0
Real Estate Construction Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Greater Than 90 Days	0	1,426
Total Past Due	0	1,426
Current	2,007	984
Loans	2,007	2,410
Recorded Investment 90 Days and Accruing	0	0
Real Estate Construction Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	150
60-89 Days Past Due	0	0
Greater Than 90 Days	0	3,103
Total Past Due	0	3,253
Current	2,658	4,029
Loans	2,658	7,282
Recorded Investment 90 Days and Accruing	0	0
Consumer And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	12	0
60-89 Days Past Due	9	0
Greater Than 90 Days	0	0
Total Past Due	21	0
Current	5,458	7,401
Loans	5,479	7,401	5,005
Recorded Investment 90 Days and Accruing	$ 0	$ 0