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Acquisition of OceanGeo (Tables)
 9 Months Ended
Sep. 30, 2015
Business Combinations [Abstract]  
Business Acquisition, Pro Forma Information
Amounts presented below are in thousands, except for the per share amounts:
 
Pro forma Consolidated ION Income Statement Information
 
Nine Months Ended September 30, 2014
 
 
Net revenues
 
$
381,902

 
Income from operations
 
$
22,492

 
Net income
 
$
55,838

 
Net income attributable to ION
 
$
53,684

 
Basic and diluted net income per common share
 
$
0.33