Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Summary of the Company's property and equipment

The following table presents a summary of the Company’s property and equipment balances as of December 31, 2019 and 2018 (in thousands).

	December 31,
	2019			2018
Oil and natural gas properties
Evaluated (subject to amortization)	$	4,557,265		$	3,780,236
Unproved and unevaluated (not subject to amortization)	1,126,992			1,199,511
Total oil and natural gas properties	5,684,257			4,979,747
Accumulated depletion	(2,603,681		)	(2,273,010		)
Net oil and natural gas properties	3,080,576			2,706,737
Midstream properties
Midstream equipment and facilities	643,903			428,025
Accumulated depreciation	(38,473		)	(24,351		)
Net midstream properties	605,430			403,674
Other property and equipment
Furniture, fixtures and other equipment	9,170			7,047
Software	8,099			8,039
Leasehold improvements	9,752			6,955
Total other property and equipment	27,021			22,041
Accumulated depreciation	(13,432		)	(9,588		)
Net other property and equipment	13,589			12,453
Net property and equipment	$	3,699,595		$	3,122,864

Breakdown of the Company's unproved and unevaluated property costs not subject to amortization

The following table provides a breakdown of the Company’s unproved and unevaluated property costs not subject to amortization as of December 31, 2019 and the year in which these costs were incurred (in thousands).

Description	2019		2018		2017		2016 and prior		Total
Costs incurred for
Property acquisition	$	43,795	$	556,415	$	204,425	$	258,296	$	1,062,931
Exploration wells	10,814		171		361		352		11,698
Development wells	52,144		149		70		—		52,363
Total	$	106,753	$	556,735	$	204,856	$	258,648	$	1,126,992