Note 6 - Investment Securities (Details) - The Amortized Cost And Estimated Fair Value Of The Securities Portfolio By Contractual Maturity (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
The Amortized Cost And Estimated Fair Value Of The Securities Portfolio By Contractual Maturity [Abstract]
Due in one year or less	$ 3,656
Due in one year or less	3,666
Due in one year or less	0
Due in one year or less	0
Due after one year through five years	116,771
Due after one year through five years	116,898
Due after one year through five years	0
Due after one year through five years	0
Due after five years through ten years	89,372
Due after five years through ten years	88,384
Due after five years through ten years	765
Due after five years through ten years	850
Due after ten years	18,092
Due after ten years	17,370
Due after ten years	3,062
Due after ten years	3,079
Mortgage-backed securities	377,524
Mortgage-backed securities	379,179
Mortgage-backed securities	0
Mortgage-backed securities	0
Total	605,415
Total	605,497
Total	3,827	765
Total	$ 3,929	$ 827