Note 7 - Investment Securities (Details) - The Amortized Cost And Estimated Fair Value Of The Securities Portfolio By Contractual Maturity (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
The Amortized Cost And Estimated Fair Value Of The Securities Portfolio By Contractual Maturity [Abstract]
Due in one year or less	$ 2,681
Due in one year or less	2,694
Due in one year or less	0
Due in one year or less	0
Due after one year through five years	105,522
Due after one year through five years	105,666
Due after one year through five years	0
Due after one year through five years	0
Due after five years through ten years	109,489
Due after five years through ten years	107,528
Due after five years through ten years	0
Due after five years through ten years	0
Due after ten years	17,709
Due after ten years	16,513
Due after ten years	820
Due after ten years	871
Mortgage-backed securities	348,935
Mortgage-backed securities	351,749
Mortgage-backed securities	0
Mortgage-backed securities	0
Total	584,336
Total	584,150
Total	820	820
Total	$ 871	$ 956