Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2018

ASSET RETIREMENT OBLIGATIONS [Abstract]

Changes in Aggregate Asset Retirement Obligations

The changes in the aggregate ARO are as follows:

ARO as of December 31, 2016 (Predecessor)	$	183,476
Liabilities incurred		671
Accretion expense		7,653
Revisions in estimated cash flows		(875)
Settlements and divestitures		(28,962)
ARO as of December 31, 2017 (Predecessor)		161,963
Liabilities incurred		77
Accretion expense		3,176
Settlements and divestitures		(385)
ARO as of May 31, 2018 (Predecessor)		164,831
Fresh start adjustments (1)		(41,953)
ARO as of May 31, 2018 (Successor)		122,878
Liabilities incurred		8
Accretion expense		5,420
Settlements and divestitures		(8,700)
ARO as of December 31, 2018 (Successor)	$	119,606

(1)As a result of the application of fresh start accounting, the Successor recorded its asset retirement obligations at fair value as of the Effective Date.