Asset retirement obligations (Tables)
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]    
Asset retirement obligations

The following table provides a summary of our asset retirement obligation activity:

 

Liability for asset retirement obligations as of December 31, 2016 (Predecessor)

   $ 72,137  

Liabilities incurred in current period

     535  

Liabilities settled and disposed in current period

     (869

Revisions in estimated cash flows

     181  

Accretion expense

     1,249  
  

 

 

 

Liability for asset retirement obligations as of March 21, 2017 (Predecessor)

   $ 73,233  
  

 

 

 

Fair value fresh-start adjustment

   $ (2,757

Liability for asset retirement obligations as of March 21, 2017 (Successor)

   $ 70,476  

Liabilities incurred in current period

     —    

Liabilities settled and disposed in current period

     —    

Revisions in estimated cash flows

     —    

Accretion expense

     121  
  

 

 

 

Liability for asset retirement obligations as of March 31, 2017 (Successor)

   $ 70,597  
  

 

 

 

Less current portion included in accounts payable and

accrued liabilities

     6,066  
  

 

 

 

Asset retirement obligations, long-term

   $ 64,531  
  

 

 

 

The following table presents the balance and activity of our asset retirement obligations:

 

     For the year ended
December 31,
 
     2016      2015  

Beginning balance

   $ 48,612      $ 47,424  

Liabilities incurred in current period

     3,918        1,861  

Liabilities settled or disposed in current period

     (2,729      (6,472

Revisions in estimated cash flows

     18,364        2,139  

Accretion expense

     3,972        3,660  
  

 

 

    

 

 

 

Asset retirement obligations at end of period

     72,137        48,612  

Less current portion included in accounts payable and accrued liabilities

     6,681        2,178  
  

 

 

    

 

 

 

Asset retirement obligations, long-term

   $ 65,456      $ 46,434