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Equity Method Investments (Tables)
 6 Months Ended
Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Change in Equity Method Investments
The following table reflects the change in the Company’s equity method investments during the six months ended June 30, 2014 (in thousands):
 
INOVA Geophysical
 
OceanGeo
 
Total
Investments at December 31, 2013
$
51,065

 
$
2,800

 
$
53,865

Equity in earnings (losses) of investments
(4,207
)
 
738

 
(3,469
)
Advances to OceanGeo (prior to consolidation)
—

 
3,683

 
3,683

Acquisition of controlling interest (consolidation) of OceanGeo
—

 
(7,221
)
 
(7,221
)
Equity interest in investees' other comprehensive loss
(1,863
)
 
—

 
(1,863
)
Investments at June 30, 2014
$
44,995

 
$
—

 
$
44,995
Equity Method Investments Summarized Financial Information
The following table reflects the summarized financial information for INOVA Geophysical for the three months ended March 31, 2014 and 2013 and the six-month periods from October 1, 2013 to March 31, 2014 and 2013 (in thousands):
 
Three Months Ended March 31,
 
Six-Month Period from October 1 through March 31,
 
2014
 
2013
 
2014
 
2013
Net revenues
$
26,506

 
$
22,095

 
$
66,682

 
$
81,706

Gross profit
$
5,236

 
$
1,808

 
$
10,184

 
$
14,135

Loss from operations
$
(2,576
)
 
$
(8,511
)
 
$
(6,243
)
 
$
(8,761
)
Net loss
$
(3,634
)
 
$
(9,772
)
 
$
(8,585
)
 
$
(6,030
)