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Earnings Per Share
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
 
Calculation of basic earnings per share (Basic EPS) and diluted earnings per share (Diluted EPS) is shown below.
 
Year ended December 31,
(in thousands, except share and per share data)
2017
 
2016
 
2015
Basic
 
 
 
 
 
Net income available to common shareholders
$
52,494

 
$
59,340

 
$
58,421

Less: income attributable to unvested stock-based compensation awards
(818
)
 
(912
)
 
(834
)
Net earnings allocated to common shareholders
51,676

 
58,428

 
57,587

 
 
 
 
 
 
Weighted average shares outstanding, including unvested stock-based compensation awards
15,193,438

 
15,044,733

 
14,940,274

 
 
 
 
 
 
Less: unvested stock-based compensation awards
(243,006
)
 
(232,021
)
 
(212,081
)
Weighted average shares outstanding - Basic
14,950,432

 
14,812,712

 
14,728,193

 
 
 
 
 
 
Diluted
 
 
 
 
 
Net earnings allocated to common shareholders
51,676

 
58,428

 
57,587

 
 
 
 
 
 
Weighted average shares outstanding - Basic
14,950,432

 
14,812,712

 
14,728,193

 
 
 
 
 
 
Plus: incremental shares from assumed conversion of stock-based compensation awards
122,823

 
123,519

 
134,833

 
 
 
 
 
 
Weighted average shares outstanding - Diluted
15,073,255

 
14,936,231

 
14,863,026

 
 
 
 
 
 
Basic EPS
$
3.46

 
$
3.94

 
$
3.91

Diluted EPS
$
3.43

 
$
3.91

 
$
3.87


 
Stock-based compensation awards representing 20,789, 72,321, and 108,159 common shares for 2017, 2016, and 2015, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.