Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation [Abstract]

Asset Retirement Obligation Transactions

Balance December 31, 2016	$	2,046
Accretion expense		141
Liabilities incurred		1
Liabilities settled		(45)
Liabilities sold properties		(11)
Revisions in estimated liabilities		138
Balance December 31, 2017	$	2,270
Accretion expense		141
Liabilities incurred		7
Liabilities settled		(41)
Revisions in estimated liabilities		(198)
Balance December 31, 2018	$	2,179