Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Net Profits Plan Cash Payment Allocation

Cash payments made or accrued under the Company’s Net Profits Interest Bonus Plan (“Net Profits Plan”) that have been recorded as either G&A expense or exploration expense are presented in the table below:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands)
General and administrative expense	$	1,986	$	3,443	$	4,964	$	7,229
Exploration expense	194		323		482		697
Total	$	2,180	$	3,766	$	5,446	$	7,926