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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligation A reconciliation of our liability for plugging and abandonment costs for the nine months ended September 30, 2020 and the year ended December 31, 2019 is as follows (in thousands):

 

  

Nine Months

Ended

September 30,

 2020

 

 

Year

Ended

December 31,

2019

 

Beginning of period

  

$

251,076

 

 

$

312,754

 

Liabilities incurred

  

 

1,890

 

 

 

4,063

 

Acquisitions

 

 

123

 

 

 

 

Liabilities settled

 

 

(3,068

)

 

 

(5,953

)

Disposition of wells

 

 

(176,747

)

 

 

(82,576

)

Accretion expense

  

 

6,207

 

 

 

15,658

 

Change in estimate

  

 

2,573

 

 

 

7,130

 

End of period

  

 

82,054

 

 

 

251,076

 

Less current portion

  

 

(2,103

)

 

 

(2,393

)

Long-term asset retirement obligations

  

$

79,951

 

 

$

248,683