Note 14 - Federal and State Income Taxes - The Change in Deferred Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal and State Income Taxes
Provision for income taxes		$ 6,364	$ 6,292	$ (6,030)
Net deferred tax asset resulting from market value adjustments of acquisitions		(381)	(52)	243
Net deferred tax liabilities resulting from sale of bank subsidiary		(1,644)
Re-measurement of deferred tax asset to incorporate newly enacted tax rates	$ (2,900)			2,919
Statement of stockholders' equity- Other comprehensive income (loss)		1,433	(1,000)	668
Total		$ 5,772	$ 5,240	$ (2,200)