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Acquisitions (Tables)
 3 Months Ended
Mar. 31, 2016
Acquisitions [Abstract]  
Business Acquisition, Pro Forma Information
The following unaudited consolidated pro forma results of operations are as follows (in thousands except per share amounts):

  
Three months ended March 31,
 
  
2016
  
2015
 
Revenue
 
$
143,636
  
$
128,196
 
Income from continuing operations
 
$
6,552
  
$
5,383
 
Basic earnings per share
 
$
1.22
  
$
1.00
 
Diluted earnings per share
 
$
1.21
  
$
1.00