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Note 2 - Investment Securities - Securities Held to Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Securities held to maturity	$ 47,092	$ 47,133
Securities held to maturity, Unrealized Gains	104	135
Securities held to maturity, Unrealized Losses	0	(2)
Securities held to maturity, Fair Value	47,196	47,266
US Government Agencies Debt Securities [Member]
Securities held to maturity	36,725	36,741
Securities held to maturity, Unrealized Gains	82	124
Securities held to maturity, Unrealized Losses
Securities held to maturity, Fair Value	36,807	36,865
Corporate Debt Securities [Member]
Securities held to maturity	10,367	10,392
Securities held to maturity, Unrealized Gains	22	11
Securities held to maturity, Unrealized Losses		(2)
Securities held to maturity, Fair Value	$ 10,389	$ 10,401

X

- Definition

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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