Note 4 - Securities (Details) - The Amortized Cost and Estimated Fair Value of Available-for-Sale and Held-to-Maturity Securities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2012
AMOUNTS MATURING IN:
One year or less	$ 1,671
One year or less	1,699
One year or less	241
One year or less	241
One year through five years	64,753
One year through five years	65,423
One year through five years	1,486
One year through five years	1,500
Five years through ten years	44,729
Five years through ten years	45,310
Five years through ten years	15,422
Five years through ten years	15,587
After ten years	73,244
After ten years	74,554
After ten years	19,657
After ten years	19,790
Total	184,397
Total	186,986	216,640	18,800
Total	36,806
Total	$ 37,118