Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

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, 2013 and 2012 (in thousands).

	December 31,
	2013			2012
Oil and natural gas properties
Evaluated (subject to amortization)	$	1,090,656		$	763,527
Unproved and unevaluated (not subject to amortization)
Incurred in 2013	82,628			—
Incurred in 2012	23,341			36,488
Incurred in 2011	10,982			24,138
Incurred in 2010 and prior	77,355			89,049
Total unproved and unevaluated	194,306			149,675
Total oil and natural gas properties	1,284,962			913,202
Accumulated depletion	(463,091		)	(344,609		)
Net oil and natural gas properties	821,871			568,593
Other property and equipment
Computer equipment	1,044			834
Furniture	1,057			793
Software	1,456			1,355
Other equipment	252			196
Leasehold improvements	991			644
Support equipment and facilities	25,110			23,436
Total other property and equipment	29,910			27,258
Accumulated depreciation	(5,904		)	(4,761		)
Net other property and equipment	24,006			22,497
Net property and equipment	$	845,877		$	591,090

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, 2013 and the year in which these costs were incurred (in thousands).

Description	2013		2012		2011		2010 and prior		Total
Costs incurred for
Property acquisition	$	66,582	$	22,944	$	9,050	$	77,355	$	175,931
Exploration wells	12,901		247		1,932		—		15,080
Development wells	3,145		—		—		—		3,145
Capitalized interest	—		150		—		—		150
Total	$	82,628	$	23,341	$	10,982	$	77,355	$	194,306