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Earnings per Share (Tables)
3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Summary of Computation for Basic and Diluted Earnings per Share
The following table sets forth the computation of basic and diluted earnings per share. For additional information on the calculation of basic and diluted earnings per share, see Note 1, "Summary of Significant Accounting Policies - Earnings per Share" of the Corporation's Annual Report on Form 10-K for the year ended December 31, 2022.
Three Months Ended
 March 31,
(Dollars and shares in thousands, except per share data)20232022
Numerator for basic and diluted earnings per share—net income available to common shareholders
$21,034 $20,317 
Denominator for basic earnings per share—weighted-average shares outstanding
29,312 29,542 
Effect of dilutive securities—employee stock options and restricted stock units194 196 
Denominator for diluted earnings per share—adjusted weighted-average shares outstanding
29,506 29,738 
Basic earnings per share$0.72 $0.69 
Diluted earnings per share$0.71 $0.68 
Average antidilutive options and restricted stock units excluded from computation of diluted earnings per share229 249