Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Summary of the valuation of the Company's financial assets and liabilities that were accounted for at fair value on a recurring basis

The following tables summarize the valuation of the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis in accordance with the classifications provided above as of December 31, 2014 and 2013 (in thousands).

	Fair Value Measurements at December 31, 2014 using
Description
	Level 1		Level 2		Level 3		Total
Assets (Liabilities)
Oil, natural gas and NGL derivatives	$	—	$	55,549	$	—	$	55,549
Total	$	—	$	55,549	$	—	$	55,549

	Fair Value Measurements at December 31, 2013 using
Description
	Level 1		Level 2			Level 3		Total
Assets (Liabilities)
Oil, natural gas and NGL derivatives	$	—	$	192		$	—	$	192
Oil, natural gas and NGL derivatives	—		(2,945		)	—		(2,945		)
Total	$	—	$	(2,753	)	$	—	$	(2,753	)

Additions to asset retirement obligations and lease and well equipment inventory at fair value on a non-recurring basis

The following tables summarize the valuation of the Company’s assets and liabilities that were accounted for at fair value on a non-recurring basis as of December 31, 2014 and 2013 (in thousands).

	Fair Value Measurements at December 31, 2014 using
Description
	Level 1		Level 2		Level 3			Total
Assets (Liabilities)
Asset retirement obligations	$	—	$	—	$	(3,985	)	$	(3,985	)
Total	$	—	$	—	$	(3,985	)	$	(3,985	)

	Fair Value Measurements at December 31, 2013 using
Description
	Level 1		Level 2		Level 3			Total
Assets (Liabilities)
Asset retirement obligations	$	—	$	—	$	(1,470	)	$	(1,470	)
Total	$	—	$	—	$	(1,470	)	$	(1,470	)