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Note 6 - Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Available-for-sale securities, amortized cost	$ 330,731	$ 342,278
Available-for-sale securities, gross unrealized holding gains	11,787	5,407
Available-for-sale securities, gross unrealized holding losses	(102)	(962)
Available-for-sale debt securities, at fair value	342,416	346,723
US Government Agencies Debt Securities [Member]
Available-for-sale securities, amortized cost	15,704	16,380
Available-for-sale securities, gross unrealized holding gains	704	620
Available-for-sale securities, gross unrealized holding losses	0	0
Available-for-sale debt securities, at fair value	16,408	17,000
Obligations of States and Political Subdivisions Tax Exempt [Member]
Available-for-sale securities, amortized cost	78,126	68,787
Available-for-sale securities, gross unrealized holding gains	2,982	2,011
Available-for-sale securities, gross unrealized holding losses	(36)	(38)
Available-for-sale debt securities, at fair value	81,072	70,760
Obligations of States and Political Subdivisions Taxable [Member]
Available-for-sale securities, amortized cost	35,764	35,446
Available-for-sale securities, gross unrealized holding gains	1,348	927
Available-for-sale securities, gross unrealized holding losses	(38)	(70)
Available-for-sale debt securities, at fair value	37,074	36,303
Residential Pass-Through Securities [Member]
Available-for-sale securities, amortized cost	54,280	58,875
Available-for-sale securities, gross unrealized holding gains	1,472	472
Available-for-sale securities, gross unrealized holding losses	0	(137)
Available-for-sale debt securities, at fair value	55,752	59,210
Residential Collateralized Mortgage Obligations [Member]
Available-for-sale securities, amortized cost	101,130	115,025
Available-for-sale securities, gross unrealized holding gains	2,435	308
Available-for-sale securities, gross unrealized holding losses	(9)	(610)
Available-for-sale debt securities, at fair value	103,556	114,723
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	45,727	47,765
Available-for-sale securities, gross unrealized holding gains	2,846	1,069
Available-for-sale securities, gross unrealized holding losses	(19)	(107)
Available-for-sale debt securities, at fair value	$ 48,554	$ 48,727

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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-SubTopic 10
-Section 50
-Paragraph 2
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+ References

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