Fair Value Measurements of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Measurements of Financial Instruments

Schedule of commodity derivative contracts in the condensed consolidated balance sheets are recorded at estimated fair value

	Fair Value Measurements at June 30, 2015
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in thousands)
Assets:
Commodity derivative oil swaps	$	—	$	27,708	$	—	$	27,708
Commodity derivative gas swaps	—		9,152		—		9,152
Total assets	$	—	$	36,860	$	—	$	36,860
Liabilities:
Commodity derivative oil swaps	$	—	$	2,869	$	—	$	2,869
Commodity derivative gas swaps	—		—		—		—
Total liabilities	$	—	$	2,869	$	—	$	2,869

	Fair Value Measurements at December 31, 2014
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in thousands)
Assets:
Commodity derivative oil swaps	$	—	$	106,450	$	—	$	106,450
Commodity derivative gas swaps	—		20,259		—		20,259
Total assets	$	—	$	126,709	$	—	$	126,709
Liabilities:
Commodity derivative oil swaps	$	—	$	—	$	—	$	—
Commodity derivative gas swaps	—		—		—		—
Total liabilities	$	—	$	—	$	—	$	—