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Note P - Share-based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 0    
Share-Based Payment Arrangement, Expense $ 9,600 $ 12,121 $ 13,046
Share-Based Payment Arrangement, Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 4 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years    
Share-Based Payment Arrangement, Option [Member] | Exercisable on the First Anniversary Date Following the Date of Grant [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%    
Share-Based Payment Arrangement, Option [Member] | Exercisable on Semi-annual Basis [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 12.50%    
Performance Shares [Member]      
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 13,800    
Share-Based Payment Arrangement, Expense $ 1,700 $ 700  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 11 months 12 days    
Performance Shares [Member] | Minimum [Member]      
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount 0.00%    
Performance Shares [Member] | Maximum [Member]      
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount 200.00%    
Performance Shares [Member] | Vesting on the Third Anniversary [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 100.00%