Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property and Equipment

Schedule of property and equipment

	March 31, 2018			December 31, 2017
	(in thousands)
Oil and gas properties, on the basis of full-cost accounting:
Proved properties	$	798,593		$	765,308
Unproved properties not being amortized	7,142			7,065
Other property and equipment	6,502			6,508
Less accumulated depreciation, depletion, amortization and impairment	(219,590		)	(204,419		)
Net property and equipment	$	592,647		$	574,462

Schedule of costs incurred in oil and natural gas property acquisition, exploration and development activities

The Company capitalizes internal costs directly related to exploration and development activities to oil and gas properties. During the three months ended March 31, 2018 and 2017, the Company capitalized the following (in thousands):

	2018		2017
Internal costs capitalized to oil and gas properties (1)	$	895	$	3,017

(1) Inclusive of $0.2 million and $0.7 million of qualifying share-based compensation expense for the three months ended March 31, 2018 and 2017, respectively.

Schedule of depletion expense related to oil and gas properties

	Three Months Ended March 31,				Three Months Ended March 31,
	2018		2017		2018		2017
	(in thousands)				(per Boe)
Depletion expense	$	14,623	$	14,753	$	8.45	$	6.96
Depreciation on other property and equipment	590		589		0.34		0.28
Depreciation, depletion, and amortization	$	15,213	$	15,342	$	8.79	$	7.24