Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment includes the following:

	December 31,
	2013			2012
Oil and natural gas properties:
Subject to depletion	$	1,278,799		$	576,497
Not subject to depletion-acquisition costs
Incurred in 2013	279,353			—
Incurred in 2012	87,252			117,395
Incurred in 2011	1,598			1,670
Incurred in 2010	1,358			1,647
Incurred in 2009	—			533
Total not subject to depletion	369,561			121,245
Gross oil and natural gas properties	1,648,360			697,742
Less accumulated depreciation, depletion, amortization and impairment	(210,837		)	(145,102		)
Oil and natural gas properties, net	1,437,523			552,640
Pipeline and gas gathering assets	6,142			—
Other property and equipment	4,071			2,337
Less accumulated depreciation	(1,399		)	(735		)
Other property and equipment, net	2,672			1,602
Property and equipment, net of accumulated depreciation, depletion, amortization and impairment	$	1,446,337		$	554,242