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Earnings Per Share
12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
EARNINGS PER SHARE EARNINGS PER SHARE
 
 The following table sets forth the reconciliation from basic to diluted average common shares and the calculations of net income per common share. Net income for basic and diluted calculations does not differ.
(in thousands, except per share amounts) 201820172016
Net income $73,486 $44,315 $40,045 
Average common shares:       
Basic (weighted-average outstanding shares) 11,660 11,549 11,434 
Dilutive potential common shares from stock options 101 133 131 
 
Diluted (weighted-average outstanding shares)
11,761 11,682 11,565 
Basic earnings per share $6.30 $3.84 $3.50 
Diluted earnings per share $6.25 $3.79 $3.46 
 
Stock options totaling 4,850 shares in 2018, 1,565 shares in 2017, and 21,491 shares in 2016 were not included in the diluted earnings per share calculation because the effect would have been anti-dilutive.