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EARNINGS PER SHARE (Tables)
 9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share
Earnings per share have been computed based on the following (average diluted shares outstanding are calculated using the treasury stock method):
 Three Months Ended September 30,Nine Months Ended September 30,
(In thousands, except per share data)2022202120222021
Net income$18,717 $63,749 $62,028 $98,416 
Average number of common shares issued51,903 51,903 51,903 51,903 
Less: average number of treasury shares6,433 2,764 5,068 1,519 
Less: average number of unvested stock award shares770 744 779 712 
Average number of basic shares outstanding44,700 48,395 46,056 49,672 
Plus: dilutive effect of unvested stock award shares330 342 336 286 
Plus: dilutive effect of stock options outstanding4 7 4 5 
Average number of diluted shares outstanding45,034 48,744 46,396 49,963 
Basic earnings per common share:$0.42 $1.32 $1.35 $1.98 
Diluted earnings per common share:$0.42 $1.31 $1.34 $1.97