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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Schedule of reconciliation of numerator and denominator of basic and diluted earnings per share
The following represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the condensed consolidated financial statements:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
(in thousands, except share and per share amounts)
Net income to shareholders
$
16,984

 
$
14,541

 
$
32,617

 
$
32,991

 
 
 
 
 
 
 
 
Weighted average common shares outstanding:
 
 
 
 
 
 
 
Basic
29,882,988

 
29,406,877

 
29,823,982

 
29,348,557

Common share equivalents
410,945

 
900,222

 
419,964

 
969,028

Diluted
30,293,933

 
30,307,099

 
30,243,946

 
30,317,585

 
 
 
 
 
 
 
 
Earnings per share:
 
 
 
 
 
 
 
Basic
$
0.57

 
$
0.49

 
$
1.09

 
$
1.12

Common share equivalents
(0.01
)
 
(0.01
)
 
(0.01
)
 
(0.03
)
Diluted
$
0.56

 
$
0.48

 
$
1.08

 
$
1.09