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Properties and Equipment, Net - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Property, Plant and Equipment [Line Items]            
Proceeds from sale of assets       $ 49,828 $ 3,002  
Gain (loss) on sale of assets   $ (878) $ (79) $ 477 $ 59  
East Texas | Oil and Gas Properties, Proved and Unproved            
Property, Plant and Equipment [Line Items]            
Proceeds from sale of assets $ 56,400          
Gain (loss) on sale of assets $ 500          
Escrow deposit           $ 6,300