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Quarterly Financial Summary (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Schedule of unaudited quarterly financial information
The following tables set forth selected unaudited quarterly financial information for each of the Company’s last eight quarters:

 
1st Quarter
2nd Quarter
3rd Quarter
4th Quarter
 
(in thousands, except per share data)
2015
 
 
 
 
Revenue
$
85,444

$
80,263

$
76,291

$
85,912

Income before income taxes
14,481

11,607

10,549

15,759

Net income
8,793

7,073

6,757

9,791

Net income per common share:
 
 
 
 
Basic
$
0.51

$
0.42

$
0.41

$
0.61

Diluted
$
0.51

$
0.42

$
0.41

$
0.60

2014
 
 
 
 
Revenue
$
88,553

$
85,463

$
84,708

$
91,297

Income before income taxes
16,806

15,933

14,745

18,709

Net income
10,436

9,802

8,842

11,797

Net income per common share:
 
 
 
 
Basic
$
0.59

$
0.56

$
0.51

$
0.69

Diluted
$
0.59

$
0.56

$
0.51

$
0.68