Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2016

Asset Retirement Obligation Disclosure [Abstract]

Reconciliation of Asset Retirement Obligations which are Included in Other Liabilities

The following table reconciles our AROs as of the dates presented, which are included in the “Other liabilities” caption on our Consolidated Balance Sheets: 

	Successor			Predecessor
	Period From September 13, 2016			Period From January 1, 2016			December 31,
	Through December 31, 2016			Through September 12, 2016			2015
Balance at beginning of period	$	2,687		$	2,621		$	5,890
Fresh Start Accounting adjustment	—			(754		)	—
Changes in estimates	27			176			172
Liabilities incurred	—			469			110
Liabilities settled	(311		)	—			—
Sale of properties	—			—			(3,932		)
Accretion expense	56			175			381
Balance at end of period	$	2,459		$	2,687		$	2,621