SUPPLEMENTARY INFORMATION ON OIL AND NATURAL GAS ACTIVITIES (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2018

Supplementary Information On Oil And Natural Gas Activities [Abstract]

Capitalized Costs Relating to Oil and Natural Gas Producing Activities

Capitalized costs relating to oil and natural gas producing activities are as follows at December 31:

	Successor		Predecessor
	2018		2017
Proved oil and natural gas properties	$	410,184	$	2,567,086
Unproved oil and natural gas properties		8,454		—
		418,638		2,567,086
Accumulated depreciation, depletion and amortization		(12,950)		(1,191,559)
Net capitalized costs	$	405,688	$	1,375,527

Costs Incurred in Oil and Natural Gas Property Acquisition and Development Activities

Costs incurred in oil and natural gas property acquisition and development activities are as follows for the periods indicated:

	Successor		Predecessor
	Seven Months		Five Months
	Ended		Ended		Year Ended December 31,
	December 31, 2018		May 31, 2018		2017		2016
Acquisition of oil and natural gas properties:
Proved	$	—	$	—	$	58,230	$	—
Unproved		—		—		3,170		—
Exploration costs		177		122		413		651
Development costs		17,925		26,841		39,348		10,712
Total	$	18,102	$	26,963	$	101,161	$	11,363