Note 5 - Securities (Details) - The Amortized Cost and Estimated Fair Value of Available-for-sale and Held-to-maturity Securities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Amounts maturing in:
One year or less	$ 3,689
One year or less	3,695
One year through five years	57,535
One year through five years	57,927
One year through five years	1,494
One year through five years	1,505
Five years through ten years	35,058
Five years through ten years	35,447
Five years through ten years	16,065
Five years through ten years	16,134
After ten years	62,961
After ten years	63,694
After ten years	19,096
After ten years	18,791
Total	159,243
Total	160,763	$ 186,986
Total	36,655
Total	$ 36,430