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Earnings Per Share
3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
Basic earnings per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period presented. Diluted earnings per share is computed by including the net increase in shares as if dilutive outstanding restricted stock units were vested and stock options were exercised, using the treasury stock method.

Basic and diluted earnings per share has been computed based on the following:

 Three Months ended
(Dollars in thousands, except per share data)March 31,
2020
March 31,
2019
Net income available to common stockholders, basic and diluted
$43,339  49,132  
Average outstanding shares - basic93,287,670  84,549,974  
Add: dilutive restricted stock units and stock options
72,122  64,274  
Average outstanding shares - diluted93,359,792  84,614,248  
Basic earnings per share$0.46  0.58  
Diluted earnings per share$0.46  0.58  
Restricted stock units and stock options excluded from the
  diluted average outstanding share calculation 1
102,094  —  
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1 Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock unit or the exercise price of a stock option exceeds the market price of the Company’s stock.