Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2015

Property and Equipment

Schedule of property and equipment

	June 30, 2015			December 31, 2014
	(in thousands)
Oil and gas properties, on the basis of full-cost accounting:
Proved properties	$	3,527,182		$	3,398,146
Unevaluated properties	31,778			44,535
Other property and equipment	14,734			13,454
Less accumulated depreciation, depletion, amortization and impairment	(2,119,458		)	(1,333,019		)
Net property and equipment	$	1,454,236		$	2,123,116

Schedule of internal costs capitalized

During the three and six months ended June 30, 2015 and 2014, the Company capitalized the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Internal costs capitalized to oil and gas properties (1)	$	2,613	$	3,325	$	4,915	$	6,449

(1) Inclusive of $0.4 million and $0.6 million of qualifying share-based compensation expense for the three months ended June 30, 2015 and 2014, respectively. For the six months ended June 30, 2015 and 2014, inclusive of $0.9 million and $1.2 million, respectively.

Schedule of depletion expense related to oil and gas properties

	Three Months Ended June 30,								Six Months Ended June 30,
	2015		2014		2015		2014		2015		2014		2015		2014
	(in thousands)				(per Boe)				(in thousands)				(per Boe)
Depletion expense	$	54,359	$	70,323	$	17.63	$	24.22	$	111,964	$	136,527	$	18.18	$	24.76
Depreciation on other property	896		751		0.29		0.25		1,719		1,448		0.28		0.26
Depreciation, depletion, and amortization	$	55,255	$	71,074	$	17.92	$	24.47	$	113,683	$	137,975	$	18.46	$	25.02