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Asset Retirement Obligations
 9 Months Ended
Sep. 30, 2016
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations
ASSET RETIREMENT OBLIGATIONS
Asset retirement obligations relate to future plugging and abandonment expenses on oil and natural gas properties and related facilities disposal. 
The following table summarizes the changes in the Company’s asset retirement obligations for the nine months ended September 30, 2016 (in thousands):
 
September 30, 2016
Asset retirement obligations, beginning of period
$
18,220

Additional liabilities incurred
1,803

Accretion expense
575

Liabilities settled upon plugging and abandoning wells
(6
)
Disposition of wells
(534
)
Revision of estimates
(2,927
)
Asset retirement obligations, end of period
$
17,131