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Asset Retirement Obligation (Tables)
 3 Months Ended
Mar. 31, 2018
Asset Retirement Obligation  
Reconciliation of Asset Retirement Obligation

The following table is a reconciliation of the ARO (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

March 31, 

 

December 31, 

 

    

2018

    

2017

Asset retirement obligation, beginning balance

 

$

6,074

 

$

13,579

Liabilities added from escalating working interests

 

 

288

 

 

198

Sales

 

 

 —

 

 

(8,416)

Settlements

 

 

 —

 

 

(60)

Accretion expense

 

 

126

 

 

773

Asset retirement obligation, ending balance

 

$

6,488

 

$

6,074