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Quarterly Financial Summary (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2018
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)
2018
 
 
 
 
 
 
 
Revenue
$
74,967

 
$
72,798

 
$
72,992

 
$
76,930

Income from operations before income taxes
6,655

 
8,709

 
7,658

 
12,419

Net income
4,589

 
6,458

 
5,499

 
9,093

Net income per common share:
 
 
 
 
 
 
 
Basic
$
0.28

 
$
0.39

 
$
0.33

 
$
0.55

Diluted
$
0.28

 
$
0.39

 
$
0.33

 
$
0.55

2017
 
 
 
 
 
 
 
Revenue
$
75,688

 
$
72,196

 
$
73,279

 
$
78,085

Income from operations before income taxes
8,318

 
6,333

 
7,616

 
12,777

Net income
4,509

 
3,829

 
4,366

 
8,417

Net income per common share:
 
 
 
 
 
 
 
Basic
$
0.28

 
$
0.24

 
$
0.27

 
$
0.52

Diluted
$
0.28

 
$
0.23

 
$
0.27

 
$
0.51