Note 3 - Investment Securities (Details) - Investment Securities by Contractual Maturity (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investment Securities by Contractual Maturity [Abstract]
Due in 1 year or less	$ 15,105
Due in 1 year or less	15,291
Due in 1 year or less	0
Due in 1 year or less	0
After 1 year to 5 years	70,661
After 1 year to 5 years	71,584
After 1 year to 5 years	40,604
After 1 year to 5 years	40,974
After 5 years to 10 years	88,885
After 5 years to 10 years	87,663
After 5 years to 10 years	27,262
After 5 years to 10 years	27,279
After 10 years	10,599
After 10 years	10,841
After 10 years	0
After 10 years	0
Total	185,250
Total	185,379us-gaap_AvailableForSaleSecurities	204,891us-gaap_AvailableForSaleSecurities
Total	67,866us-gaap_HeldToMaturitySecurities	21us-gaap_HeldToMaturitySecurities
Total	$ 68,253	$ 21

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This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.