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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Earnings Per Share
 
Three months ended
 
Six months ended
 
June 30,
2015
 
June 30,
2014
 
June 30,
2015
 
June 30,
2014
 
(in thousands, except share and per share data)
Numerator:
 
 
 
 
 
 
 
Net income
$
11,130

 
$
11,363

 
$
19,529

 
$
21,185

Denominator:
 

 
 

 
 
 
 
Basic weighted average shares
54,208,362

 
55,004,175

 
54,205,657

 
55,036,281

Effect of dilutive stock options and restricted stock
461,401

 
564,037

 
508,947

 
567,698

Diluted weighted average shares
54,669,763

 
55,568,212

 
54,714,604

 
55,603,979

Earnings per share:
 

 
 

 
 
 
 
Basic
$
0.21

 
$
0.21

 
$
0.36

 
$
0.38

Diluted
$
0.20

 
$
0.20

 
$
0.36

 
$
0.38

Anti-dilutive shares:
 

 
 

 
 
 
 
Shares
145,136

 
18,445

 
134,625

 
19,448