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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Computation of Earnings Per Share
Earnings per share have been computed based on the following:
 Year Ended December 31,
(in thousands)201920182017
Net income$92,072  $68,320  $40,554  
Average number of common shares outstanding30,478  26,593  22,912  
Effect of dilutive stock options and restricted stock167  287  338  
Average number of common shares outstanding used to calculate diluted earnings per share30,645  26,880  23,250  
Options excluded from diluted earnings per share because the effect of these options was antidilutive—  10,056  —