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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Schedule of basic and diluted earnings per share
Earnings per share in the table below, for the three and six month periods ended June 30, 2018 and 2017 are calculated under the two-class method as required by ASC Topic 260, Earnings Per Share. ASC 260 provides that unvested share-based payment awards that contain nonforfeitable rights to dividends are participating securities and shall be included in the computation of earnings per share pursuant to the two-class method. The Company has issued restricted stock awards that contain such rights and are therefore considered participating securities. Basic earnings per common share are calculated by dividing net income allocable to common stock by the weighted average number of common shares, excluding participating securities, during the period. Diluted earnings per common share include the dilutive effect of participating securities.
 
 
Three Months Ended
(in thousands, except share and per share data)
6/30/2018
 
6/30/17
Basic
 

 
 

Net income available to common shareholders
$
22,059

 
$
16,926

Less: income attributable to unvested stock-based compensation awards
(359
)
 
(266
)
Net earnings allocated to common shareholders
21,700

 
16,660

 
 
 
 
Weighted average shares outstanding, including unvested stock-based compensation awards
15,280,412

 
15,184,835

 
 
 
 
Less: unvested stock-based compensation awards
(242,351
)
 
(239,901
)
Weighted average shares outstanding - Basic
15,038,061

 
14,944,934

 
 
 
 
Diluted
 

 
 

Net earnings allocated to common shareholders
21,700

 
16,660

 
 
 
 
Weighted average shares outstanding - Basic
15,038,061

 
14,944,934

 
 
 
 
Plus:  incremental shares from assumed conversion of stock-based compensation awards
97,909

 
121,927

 
 
 
 
Weighted average shares outstanding - Diluted
15,135,970

 
15,066,861

 
 
 
 
Basic EPS
1.44

 
1.11

Diluted EPS
1.43

 
1.11

 
Six Months Ended
(in thousands, except share and per share data)
6/30/2018
 
6/30/2017
Basic
 

 
 

Net income available to common shareholders
$
42,495

 
$
32,642

Less: income attributable to unvested stock-based compensation awards
(706
)
 
(527
)
Net earnings allocated to common shareholders
41,789

 
32,115

 
 
 
 
Weighted average shares outstanding, including unvested stock-based compensation awards
15,276,194

 
15,168,310

 
 
 
 
Less: unvested stock-based compensation awards
(250,402
)
 
(245,242
)
Weighted average shares outstanding - Basic
15,025,792

 
14,923,068

 
 
 
 
Diluted
 

 
 

Net earnings allocated to common shareholders
41,789

 
32,115

 
 
 
 
Weighted average shares outstanding - Basic
15,025,792

 
14,923,068

 
 
 
 
Plus: incremental shares from assumed conversion of stock-based compensation awards
98,475

 
131,802

 
 
 
 
Weighted average shares outstanding - Diluted
15,124,267

 
15,054,870

 
 
 
 
Basic EPS
2.78

 
2.15

Diluted EPS
2.76

 
2.13