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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Computation of Earnings Per Share Potential common shares that may be issued by the Company relate to outstanding stock options and restricted stock units (RSUs), and are determined using the treasury stock method. Earnings per share have been computed based on the following:
Three months ended September 30,
(in thousands)20222021
Net income$37,338 $27,422 
Average number of common shares outstanding33,348 29,714 
Effect of dilutive stock options and restricted stock115 137 
Average number of common shares outstanding used to calculate diluted earnings per share33,463 29,851 
Options excluded from diluted earnings per share because of their antidilutive effect— — 
Nine months ended September 30,
(in thousands)20222021
Net income$89,076 $89,433 
Average number of common shares outstanding32,332 29,720 
Effect of dilutive stock options and restricted stock137 167 
Average number of common shares outstanding used to calculate diluted earnings per share32,469 29,887 
Options excluded from diluted earnings per share because of their antidilutive effect— —