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Note N - Restructuring Activities - Restructuring Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring expense $ 6,359 $ 9,374 $ 11,800
Adjustment to Contract Termination Fee [Member]      
Restructuring expense 0 (306)  
Employee Severance [Member]      
Restructuring expense 2,482 2,495  
Lease Impairment and Termination Charges [Member]      
Restructuring expense 868 2,974  
Capital Losses from Asset Disposal [Member]      
Restructuring expense 33 1,327  
Facility Closing [Member]      
Restructuring expense 2,976 2,884  
Facility, Asset Impairment and Other Expense [Member]      
Restructuring expense $ 3,877 $ 7,185