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Commitments and Contingencies (Details)
MMcf in Thousands, $ in Millions
6 Months Ended
Jun. 30, 2017
USD ($)
MMcf
MMBbls
Jun. 30, 2017
USD ($)
MMcf
MMBbls
Jul. 26, 2017
USD ($)
Dec. 31, 2016
USD ($)
MMcf
MMBbls
Other Commitments [Line Items]        
Document Fiscal Year Focus   2017    
Gas gathering and Oil and Gas Through-put Commitments [Member]        
Other Commitments [Line Items]        
Contractual Obligation | $ $ 456.4 $ 456.4    
Water Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Water Delivery Commitments and Contracts, Remaining Contractual Volume 25 25    
Water Purchase Commitment [Member]        
Other Commitments [Line Items]        
Long-term Purchase Commitment, Minimum Volume Required 16      
Natural Gas Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMcf 883 883    
Crude Oil Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume 16 16    
Non-Operated Eagle Ford Divestiture 2017 [Member] | Gas gathering and Oil and Gas Through-put Commitments [Member]        
Other Commitments [Line Items]        
Contractual Obligation, Non-Operated Eagle Ford Assets | $       $ 501.9
Non-Operated Eagle Ford Divestiture 2017 [Member] | Natural Gas Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume on Non-Operated Eagle Ford Assets | MMcf       514
Non-Operated Eagle Ford Divestiture 2017 [Member] | Crude Oil Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume on Non-Operated Eagle Ford Assets       52
Non-Operated Eagle Ford Divestiture 2017 [Member] | Natural Gas Liquids Pipeline Commitment [Member]        
Other Commitments [Line Items]        
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume on Non-Operated Eagle Ford Assets       13
Subsequent Event [Member] | Drilling Rig Leasing Contracts [Member]        
Other Commitments [Line Items]        
Contractual Obligation | $     $ 23.7  
Early Termination Penalty for Rig Contract Cancellation | $     $ 15.1