Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

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, 2014 and 2013 (in thousands).

	December 31,
	2014			2013
Oil and natural gas properties
Evaluated (subject to amortization)	$	1,617,913		$	1,090,656
Unproved and unevaluated (not subject to amortization)
Incurred in 2014	116,821			—
Incurred in 2013	62,332			82,628
Incurred in 2012	12,891			23,341
Incurred in 2011 and prior	72,375			88,337
Total unproved and unevaluated	264,419			194,306
Total oil and natural gas properties	1,882,332			1,284,962
Accumulated depletion	(596,218		)	(463,091		)
Net oil and natural gas properties	1,286,114			821,871
Other property and equipment
Computer equipment	1,110			1,044
Furniture	1,191			1,057
Software	1,733			1,456
Other equipment	332			252
Leasehold improvements	971			991
Support equipment and facilities	38,135			25,110
Total other property and equipment	43,472			29,910
Accumulated depreciation	(7,514		)	(5,904		)
Net other property and equipment	35,958			24,006
Net property and equipment	$	1,322,072		$	845,877

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, 2014 and the year in which these costs were incurred (in thousands).

Description	2014		2013		2012		2011 and prior		Total
Costs incurred for
Property acquisition	$	87,207	$	62,332	$	12,800	$	72,375	$	234,714
Exploration wells	21,494		—		—		—		21,494
Development wells	8,120		—		—		—		8,120
Capitalized interest	—		—		91		—		91
Total	$	116,821	$	62,332	$	12,891	$	72,375	$	264,419