Fair Value Measurements of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 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 March 31, 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	$	—	$	79,344	$	—	$	79,344
Commodity derivative gas swaps	—		16,129		—		16,129
Total assets	$	—	$	95,473	$	—	$	95,473
Liabilities:
Commodity derivative oil swaps	$	—	$	—	$	—	$	—
Commodity derivative gas swaps	—		—		—		—
Total liabilities	$	—	$	—	$	—	$	—

	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	$	—	$	—	$	—	$	—