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Related Party Transactions (Details) (USD $)
6 Months Ended
Jun. 30, 2014
BGP Joint Venture [Member]
Jun. 30, 2013
BGP Joint Venture [Member]
Jun. 30, 2014
INOVA Geophysical [Member]
Dec. 31, 2013
INOVA Geophysical [Member]
Jul. 31, 2013
INOVA Geophysical [Member]
Jul. 31, 2013
LIBOR [Member]
INOVA Geophysical [Member]
Property Subject to or Available for Operating Lease [Line Items]            
Company's outstanding common stock owned by BGP 14.50%          
Related party transaction, revenues from transactions with related party $ 3,900,000 $ 2,900,000        
Receivables due from BGP 1,800,000          
Loan made to equity method investee         10,000,000  
Basis spread on annual rate of loan           6.50%
Value of receivables due from related party     4,000,000 10,000,000    
Payment received on related party debt     $ 6,000,000