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ASSET RETIREMENT OBLIGATIONS (Tables)
 9 Months Ended
Sep. 30, 2019
ASSET RETIREMENT OBLIGATION  
Schedule of Asset Retirement Obligations

Aggregate carrying amounts of asset retirement obligations are as follows (dollars in thousands):

 

 

 

 

 

 

Nine Months Ended

 

 

 

September 30, 

 

 

    

2019

    

Asset retirement obligations at beginning of period

 

$

56,772

 

Liabilities incurred

 

 

9,900

 

Liabilities settled

 

 

(543)

 

Accretion expense

 

 

1,869

 

Change in cash flow estimate

 

 

286

 

Total asset retirement obligations at end of period

 

$

68,284

 

Less current asset retirement obligations at end of period

 

 

(2,294)

 

Long-term asset retirement obligations at end of period

 

$

65,990