Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations

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Asset Retirement Obligations
 9 Months Ended
Sep. 30, 2017
Asset Retirement Obligation [Abstract]  
Asset Retirement Obligations
Asset Retirement Obligations

The table below summarizes the activity for the Company’s asset retirement obligations:

For The Nine Months Ended

September 30, 2017
Asset retirement obligations at January 1, 2017
$
6,661

Accretion expense
523

Liabilities incurred
224

Liabilities settled
(227
)
Revisions to estimate (a)
(2,177
)
Asset retirement obligations at end of period
5,004

Less: Current asset retirement obligations
(1,841
)
Long-term asset retirement obligations at September 30, 2017
$
3,163


Certain of the Company’s operating agreements require that assets be restricted for abandonment obligations. Amounts recorded in the Consolidated Balance Sheets at September 30, 2017 as long-term restricted investments were $3,362. These assets, which primarily include short-term U.S. Government securities, are held in abandonment trusts dedicated to pay future abandonment costs for several of the Company’s oil and natural gas properties.