Note O - Employee and Director Benefit Plans - Reconciliation of Fund Status (Details) - Other Postretirement Benefits Plan [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Accumulated postretirement benefit obligation	$ (4,003)
Fair value of plan assets
Funded status	(4,003)
Service cost, accumulated postretirement benefit obligation	(116)
Service cost, funded status	(116)
Interest cost, accumulated postretirement benefit obligation	(110)
Interest cost, funded status	(110)
Gains/(Losses), accumulated postretirement benefit obligation	1,121
Gains/(Losses)	1,121
Benefits paid, accumulated postretirement benefit obligation	47
Benefits paid, fair value of plan assets	(47)
Participant contributions, accumulated postretirement benefit obligation	(60)
Participant contributions, fair value of plan assets	60
Employer Contributions, accumulated postretirement benefit obligation
Employer Contributions, fair value of plan assets	(13)
Employer Contributions, funded status	(13)
Accumulated postretirement benefit obligation	(3,121)
Fair value of plan assets
Funded status	$ (3,121)