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Selected Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information
The following table presents selected unaudited quarterly financial data for the periods indicated (in thousands, except per share data:
 
2013
 
December 31
 
October 1
 
July 2
 
April 2
Revenue
$
91,468

 
$
88,936

 
$
89,239

 
$
81,280

Operating income
5,163

 
5,580

 
937

 
2,572

Net income
2,407

 
3,265

 
68

 
924

Basic earnings per share
$
0.09

 
$
0.11

 
$
0.01

 
$
0.04

Diluted earnings per share
$
0.08

 
$
0.11

 
$
0.01

 
$
0.04

 
 
 
2012
 
January 1
 
October 2
 
July 3
 
April 3
Revenue
$
77,929

 
$
77,099

 
$
75,494

 
$
69,888

Operating income
3,369

 
4,004

 
5,199

 
3,481

Net income
1,559

 
133

 
2,180

 
1,291

Basic earnings per share
$
0.07

 
$
0.01

 
$
0.09

 
$
0.06

Diluted earnings per share
$
0.07

 
$
0.01

 
$
0.09

 
$
0.06