Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Details)

v3.7.0.1
Contingencies - Additional Information (Details)
 1 Months Ended 3 Months Ended
Jan. 27, 2017
USD ($)
Oct. 28, 2016
USD ($)
Jan. 31, 2014
USD ($)
Mar. 31, 2017
USD ($)
claim
Mar. 31, 2016
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2010
USD ($)
Loss Contingencies [Line Items]                
Obligation to secure financial assurances         $ 260,800,000      
Expected rescind of obligation to secure financial assurances         $ 260,800,000      
Underpayment of royalties     $ 30,000          
Under payment percentage of total royalty payments     0.0045%          
Statutory fine payment relative to underpayment       $ 1,100,000   $ 2,300,000    
Amount accrued       $ 0     $ 0  
Notified disallowed amount in reductions taken by ONRR               $ 4,700,000
Payments for royalty $ 4,700,000              
Royalty payment processing revised period       84 months        
Proposed penalties       $ 2,000,000        
BSEE                
Loss Contingencies [Line Items]                
Number of notices | claim       5        
Proposed civil penalties related to various incidents of noncompliance, total       $ 8,300,000        
Payments for civil penalty       $ 0        
Apache Corporation | Judicial Ruling                
Loss Contingencies [Line Items]                
Amount awarded for non-compliance fines and lawsuits   $ 43,200,000            
Amount offset against litigation compensation amount   $ 17,000,000