Oil and Natural Gas Properties (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Capitalized Costs Relating to Oil, Natural Gas and NGL Producing Activities

The oil and natural gas properties include the following:

	September 30, 2018			December 31, 2017
	(in thousands)
Oil and natural gas properties
Proved	$	1,276,950		$	750,492
Unproved	1,152,942			1,126,459
Less: accumulated depreciation, depletion, amortization and impairment	(183,557		)	(78,307		)
Oil and natural gas properties, net	$	2,246,335		$	1,798,644