Deferred Revenue from Volumetric Production Payment (Tables)

3 Months Ended

Mar. 31, 2014

Deferred Revenue Disclosure [Abstract]

Schedule of changes in deferred revenue from the VPP

The following table reflects the changes in the deferred revenue during the three months ended March 31, 2014 and the year ended December 31, 2013:

	March 31, 2014			December 31, 2013
	(In thousands)
Beginning of period	$	29,770		$	37,184
Deferred revenue from VPP	296			1,332
Amortization of deferred revenue from VPP	(2,010		)	(8,746		)
End of period	$	28,056		$	29,770