Note 3 - Loans (Details) - Age Of The Recorded Investment In Loans By Portfolio (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 19,355	$ 2,497
60-89 Days Past Due	414	4,634
Greater Than 90 Days	9,898	24,217
Total Past Due	29,667	31,348
Current	1,158,183	1,072,130
Loans	1,187,850	1,103,478	1,100,060
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	1,974	2,233
60-89 Days Past Due	414	817
Greater Than 90 Days	1,178	1,308
Total Past Due	3,566	4,358
Current	436,035	379,547
Loans	439,601	383,905	377,309
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	482	0
60-89 Days Past Due	0	0
Greater Than 90 Days	124	239
Total Past Due	606	239
Current	39,468	36,667
Loans	40,074	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	16,891	114
60-89 Days Past Due	0	3,817
Greater Than 90 Days	8,596	18,141
Total Past Due	25,487	22,072
Current	669,719	643,502
Loans	695,206	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	4,911	984
Loans	4,911	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	3,696	4,029
Loans	3,696	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	8	0
60-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	8	0
Current	4,354	7,401
Loans	4,362	7,401	6,723
Recorded Investment 90 Days and Accruing	$ 0	$ 0