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	Jun. 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	$ 2,272
Due in one year or less	2,223
Due in one year or less	0
Due in one year or less	0
Due after one year through five years	83,752
Due after one year through five years	83,541
Due after one year through five years	0
Due after one year through five years	0
Due after five years through ten years	111,629
Due after five years through ten years	109,743
Due after five years through ten years	0
Due after five years through ten years	0
Due after ten years	19,242
Due after ten years	17,956
Due after ten years	820
Due after ten years	910
Mortgage-backed securities	345,694
Mortgage-backed securities	346,345
Mortgage-backed securities	0
Mortgage-backed securities	0
Total	562,589
Total	559,808
Total	820	820
Total	$ 910	$ 956