Note H - Employee Benefit Plans - Acceptable Level of Volatility (Details)	Dec. 31, 2022
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan I [Member]
Target rate	39.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	24.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	54.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan II [Member]
Target rate	77.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	62.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	87.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan I [Member]
Target rate	14.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	9.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	19.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan II [Member]
Target rate	28.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	18.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	38.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan I [Member]
Target rate	9.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	4.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	14.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan II [Member]
Target rate	18.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	13.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	23.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan I [Member]
Target rate	5.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	0.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	10.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan II [Member]
Target rate	9.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	4.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	14.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan I [Member]
Target rate	8.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	3.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	13.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan II [Member]
Target rate	16.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	11.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	21.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan I [Member]
Target rate	3.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	0.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	6.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan II [Member]
Target rate	6.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	0.00%
Other Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Emerging Markets [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	9.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan I [Member]
Target rate	59.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	44.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	74.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan II [Member]
Target rate	21.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	11.00%
Pension Plan [Member] | Emerging Markets [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	31.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan I [Member]
Target rate	59.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	44.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	74.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan II [Member]
Target rate	21.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	11.00%
Pension Plan [Member] | Investment Grade [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	31.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan I [Member]
Target rate	2.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan I [Member] | Minimum [Member]
Target rate	0.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan I [Member] | Maximum [Member]
Target rate	40.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan II [Member]
Target rate	2.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan II [Member] | Minimum [Member]
Target rate	0.00%
Pension Plan [Member] | Cash Equivalent [Member] | Qualified Plan II [Member] | Maximum [Member]
Target rate	40.00%