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Note 7 - Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Available-for-sale securities, amortized cost	$ 342,278	$ 368,725
Available-for-sale securities, gross unrealized holding gains	5,407	1,778
Available-for-sale securities, gross unrealized holding losses	(962)	(7,230)
Available-for-sale debt securities, at fair value	346,723	363,273
US Government Agencies Debt Securities [Member]
Available-for-sale securities, amortized cost	16,380	12,331
Available-for-sale securities, gross unrealized holding gains	620	169
Available-for-sale securities, gross unrealized holding losses	0	0
Available-for-sale debt securities, at fair value	17,000	12,500
Obligations of States and Political Subdivisions Tax Exempt [Member]
Available-for-sale securities, amortized cost	68,787	84,204
Available-for-sale securities, gross unrealized holding gains	2,011	949
Available-for-sale securities, gross unrealized holding losses	(38)	(1,201)
Available-for-sale debt securities, at fair value	70,760	83,952
Obligations of States and Political Subdivisions Taxable [Member]
Available-for-sale securities, amortized cost	35,446	27,618
Available-for-sale securities, gross unrealized holding gains	927	208
Available-for-sale securities, gross unrealized holding losses	(70)	(127)
Available-for-sale debt securities, at fair value	36,303	27,699
Residential Pass-Through Securities [Member]
Available-for-sale securities, amortized cost	58,875	54,827
Available-for-sale securities, gross unrealized holding gains	472	48
Available-for-sale securities, gross unrealized holding losses	(137)	(1,430)
Available-for-sale debt securities, at fair value	59,210	53,445
Residential Collateralized Mortgage Obligations [Member]
Available-for-sale securities, amortized cost	115,025	148,964
Available-for-sale securities, gross unrealized holding gains	308	238
Available-for-sale securities, gross unrealized holding losses	(610)	(3,290)
Available-for-sale debt securities, at fair value	114,723	145,912
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	47,765	40,781
Available-for-sale securities, gross unrealized holding gains	1,069	166
Available-for-sale securities, gross unrealized holding losses	(107)	(1,182)
Available-for-sale debt securities, at fair value	$ 48,727	$ 39,765

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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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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+ References

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-Publisher FASB
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-Publisher FASB
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-Topic 326
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-Section 45
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