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Note 4 - Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Securities available-for-sale, amortized costs	$ 405,313	$ 431,428
Securities available-for-sale, gross unrealized gains	2,540	1,709
Securities available-for-sale, gross unrealized losses	3,208	8,127
Securities available-for-sale, fair values	404,645	425,010
US Government Agencies Debt Securities [Member]
Securities available-for-sale, amortized costs	291,215	306,264
Securities available-for-sale, gross unrealized gains	987	449
Securities available-for-sale, gross unrealized losses	2,860	6,666
Securities available-for-sale, fair values	289,342	300,047
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale, amortized costs	109,556	118,564
Securities available-for-sale, gross unrealized gains	1,506	1,218
Securities available-for-sale, gross unrealized losses	248	1,166
Securities available-for-sale, fair values	110,814	118,616
Collateralized Mortgage Backed Securities [Member]
Securities available-for-sale, amortized costs	550	586
Securities available-for-sale, gross unrealized gains	46	42
Securities available-for-sale, gross unrealized losses	0	0
Securities available-for-sale, fair values	596	628
Corporate Debt Securities [Member]
Securities available-for-sale, amortized costs	3,992	6,014
Securities available-for-sale, gross unrealized gains	1
Securities available-for-sale, gross unrealized losses	100	295
Securities available-for-sale, fair values	$ 3,893	$ 5,719

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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+ References

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