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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Earnings per Share

Basic earnings and diluted weighted-average shares outstanding are as follows for the years ended December 31 (in thousands):
 
2019
 
2018
 
2017
Numerator:
 
 
 
 
 
Income from continuing operations
$
65,091

 
$
63,809

 
$
62,965

Loss from discontinued operations
—

 
—

 
(405
)
Net income available to common shareholders
$
65,091

 
$
63,809

 
$
62,560

Denominator for basic earnings per share:
 
 
 
 
 
Weighted average shares outstanding
32,389

 
31,979

 
31,701

Denominator for diluted earnings per share:
 
 
 
 
 
Common stock options and stock units
333

 
555

 
549

Weighted average shares and conversions
32,722

 
32,534

 
32,250