Note D - Bank Premises and Equipment - Bank Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Totals, at cost	$ 53,754	$ 53,894
Less: Accumulated depreciation	36,333	35,015
Totals	17,421	18,879
Land [Member]
Totals, at cost	5,783	5,783
Building [Member]
Totals, at cost	$ 30,688	30,681
Building [Member] \| Minimum [Member]
Estimated useful lives (Year)	5 years
Building [Member] \| Maximum [Member]
Estimated useful lives (Year)	40 years
Furniture and Fixtures [Member]
Totals, at cost	$ 17,283	$ 17,430
Furniture and Fixtures [Member] \| Minimum [Member]
Estimated useful lives (Year)	30 years
Furniture and Fixtures [Member] \| Maximum [Member]
Estimated useful lives (Year)	10 years

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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