Note 3 - Loans (Detail) - Age Of The Recorded Investment In Loans By Portfolio (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
30-59 Days Past Due	$ 6,648	$ 9,484
60-89 Days Past Due	8,978	7,452
Greater Than 90 Days	25,399	25,244
Total Past Due	41,025	42,180
Current	1,059,035	1,005,826
Loans	1,100,060	1,048,006	1,062,565
Commercial And Industrial [Member]
30-59 Days Past Due	730	2,018
60-89 Days Past Due	754	121
Greater Than 90 Days	7,356	9,433
Total Past Due	8,840	11,572
Current	368,469	333,993
Loans	377,309	345,565	346,254
Real Estate Mortgage Residential [Member]
30-59 Days Past Due	5,238	105
Greater Than 90 Days	184	251
Total Past Due	5,422	356
Current	35,060	42,440
Loans	40,482	42,796
Real Estate Mortgage Commercial [Member]
30-59 Days Past Due	680	7,361
60-89 Days Past Due	8,199	4,002
Greater Than 90 Days	12,365	15,559
Total Past Due	21,244	26,922
Current	646,395	618,634
Loans	667,639	645,556
Real Estate Construction Residential [Member]
Greater Than 90 Days	2,345
Total Past Due	2,345
Current	1,738	7,011
Loans	4,083	7,011
Real Estate Construction Commercial [Member]
60-89 Days Past Due		3,324
Greater Than 90 Days	3,148
Total Past Due	3,148	3,324
Current	676
Loans	3,824	3,324
Consumer And Other [Member]
60-89 Days Past Due	25	5
Greater Than 90 Days	1	1
Total Past Due	26	6
Current	6,697	3,748
Loans	$ 6,723	$ 3,754	$ 3,629