Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Property and Equipment

Schedule of property and equipment

	March 31, 2019		December 31, 2018
	(in thousands)
Oil and gas properties, on the basis of full-cost accounting:
Proved properties	$	818,013	$	809,272
Unproved properties not being amortized		1,869		4,050
Other property and equipment		6,340		6,345
Less accumulated depreciation, depletion, amortization and impairment		(287,544)		(266,198)
Net property and equipment	$	538,678	$	553,469

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

During the three months ended March 31, 2019 and 2018, the Company capitalized the following (in thousands):

	2019		2018
Internal costs capitalized to oil and gas properties (1)	$	—	$	895

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

Schedule of depletion expense related to oil and gas properties

	Three Months Ended				Three Months Ended
	March 31,				March 31,
	2019		2018		2019		2018
	(in thousands)				(per Boe)
Depletion expense	$	11,680	$	14,623	$	9.81	$	8.45
Depreciation on other property and equipment		114		590		0.10		0.34
Depreciation, depletion, and amortization	$	11,794	$	15,213	$	9.91	$	8.79