Oil and natural gas activities (Tables)
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Abstract]    
Components of unevaluated oil and natural gas properties

The costs of unevaluated oil and natural gas properties consisted of the following at March 31, 2017, and December 31, 2016:

 

    Successor      Predecessor  
    March 31,      December 31,  
    2017      2016  

Leasehold acquisitions

   $ 579,151      $ 15,455  

Capitalized interest

     54        1,894  

Wells and facilities in progress of completion

     7,467        3,004  
 

 

 

     

 

 

  

Total unevaluated oil and natural gas properties excluded from amortization

   $ 586,672      $ 20,353  
 

 

 

     

 

 

  

Oil and natural gas properties not subject to amortization consists of unevaluated leasehold acquisition costs, capitalized interest related to the leasehold costs and wells or facilities for which reserve volumes are not classified as proved until completed.

 

     Year incurred  
     2016      2015      Total  

Leasehold acquisitions

    $ 14,170      $ 1,285      $ 15,455  

Capitalized interest

      1,356        538        1,894  

Wells and facilities in progress of completion

      3,004        —          3,004  
  

 

 

     

 

 

     

 

 

  

Total unevaluated oil and natural gas properties excluded from amortization

    $ 18,530      $ 1,823      $ 20,353  
  

 

 

     

 

 

     

 

 

  
Costs Incurred in Oil and Natural Gas Producing Activities  

Costs incurred in oil and natural gas producing activities are as follows for the years ended December 31:

 

     2016      2015      2014  

Property acquisition costs

         

Proved properties

    $ 390      $ 1,192      $ 3,496  

Unproved properties

      15,497        24,735        84,938  
  

 

 

     

 

 

     

 

 

  

Total acquisition costs

      15,887        25,927        88,434  

Development costs

      114,472        150,261        561,578  

Exploration costs

      19,055        33,091        90,146  
  

 

 

     

 

 

     

 

 

  

Total

    $ 149,414      $ 209,279      $ 740,158  
  

 

 

     

 

 

     

 

 

  
Depreciation, Depletion and Amortization Expense of Oil and Natural Gas Properties  

Depreciation, depletion, and amortization expense of oil and natural gas properties was as follows for the years ended December 31:

 

     2016      2015      2014  

DD&A

    $ 111,793      $ 204,692      $ 231,761  

DD&A per BOE:

    $ 12.52      $ 20.07      $ 21.10