Equity and Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Equity and Share-Based Compensation

Summary of changes in the number of outstanding shares

	Number of Shares
	Preferred Stock	Common Stock		Treasury Stock
Balance as of December 31, 2012	325,000	66,619,711		—
Grants of restricted stock	—	2,053,754		—
Forfeitures of restricted stock	—	(20,482	)	—
Acquisition of treasury stock	—	—		(107,058	)
Balance as of June 30, 2013	325,000	68,652,983		(107,058	)

Company's non-vested share award activity

The following table summarizes the Company’s non-vested share award activity for the six months ended June 30, 2013:

	Shares		Weighted Average Grant Date Fair Value
Non-vested shares outstanding at December 31, 2012	985,358		$	12.61
Granted	2,053,754		$	7.29
Vested	(293,488	)	$	13.10
Forfeited	(20,482	)	$	8.06
Non-vested shares outstanding at June 30, 2013	2,725,142		$	8.58

Summary of share-based compensation costs (after amounts capitalized to oil and gas properties) recognized by the company

The following table summarizes share-based compensation costs (after amounts capitalized to oil and gas properties) recognized as expense by the Company for the periods presented (in thousands):

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2013		2012		2013		2012
Incentive units	$	—	$	—	$	—	$	—
2012 LTIP restricted shares	1,770		682		3,014		682
Total share-based compensation expense, net of amounts capitalized to oil and gas properties	$	1,770	$	682	$	3,014	$	682