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	Sep. 30, 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	$ 8,565
Due in one year or less	8,590
Due in one year or less	0
Due in one year or less	0
Due after one year through five years	128,067
Due after one year through five years	128,821
Due after one year through five years	0
Due after one year through five years	0
Due after five years through ten years	85,755
Due after five years through ten years	86,111
Due after five years through ten years	765
Due after five years through ten years	855
Due after ten years	16,507
Due after ten years	16,401
Due after ten years	3,036
Due after ten years	3,122
Mortgage-backed securities	373,192
Mortgage-backed securities	377,532
Mortgage-backed securities	0
Mortgage-backed securities	0
Total	612,086
Total	617,455
Total	3,801	765
Total	$ 3,977	$ 827