Note 14 - Federal and State Income Taxes - The Change in Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal and State Income Taxes
Provision for income taxes	$ (14,530)	$ 6,364	$ 6,292
Net deferred tax asset resulting from market value adjustments of acquisitions		(381)	(52)
Net deferred tax liabilities resulting from sale of bank subsidiary	363	(1,644)
Statement of stockholders' equity- Other comprehensive income (loss)	837	1,433	(1,000)
Total	$ (13,330)	$ 5,772	$ 5,240