Note P - Fair Value Measurements and Disclosures - Change in Fair Value of Other Real Estate (Details) - Real Estate Acquired in Satisfaction of Debt [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance, beginning of year	$ 8,943	$ 8,232
Loans transferred to ORE	1,707	4,707
Sales	(2,755)	(3,232)
Write-downs	(442)	(764)
Balance, end of year	$ 7,453	$ 8,943