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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2017
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation Liability
The following table describes changes to the Partnership’s ARO liability for the periods presented:
 
 
For the year ended December 31,
 
2017
 
2016
 
(in thousands)
Beginning asset retirement obligations
$
13,350

 
$
10,585

Liabilities incurred
308

 
2,009

Liabilities settled
(228
)
 
(317
)
Accretion expense
1,026

 
892

Revisions in estimated costs
83

 
181

Dispositions
(30
)
 
—

Ending asset retirement obligations
$
14,509

 
$
13,350

Current asset retirement obligations
$
417

 
$
—

Non-current asset retirement obligations
$
14,092

 
$
13,350