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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Earnings per Share
ears ended December 31 (in thousands):
 
2017
 
2016
 
2015
Numerator:
 
 
 
 
 
Income from continuing operations
$
62,965

 
$
33,719

 
$
23,476

Loss from discontinued operations
(405
)
 
(44
)
 
(28
)
Net income available to common shareholders
$
62,560

 
$
33,675

 
$
23,448

Denominator for basic earnings per share:
 
 
 
 
 
Weighted average shares outstanding
31,701

 
31,536

 
31,233

Denominator for diluted earnings per share:
 
 
 
 
 
Common stock options and restricted stock
549

 
533

 
312

Weighted average shares and conversions
32,250

 
32,069

 
31,545