Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

The following tables summarize the approximate volumes and average contract prices of contracts the Company had in place as of March 31, 2014, and through the filing date of this report:

Oil Contracts

Oil Swaps

Contract Period	NYMEX WTI Volumes	Weighted-Average  Contract Price
	(Bbls)	(per Bbl)
Second quarter 2014	2,373,000	$	94.95
Third quarter 2014	1,533,000	$	96.04
Fourth quarter 2014	1,353,000	$	94.88
2015	3,308,000	$	89.34
2016	2,704,000	$	85.19
All oil swaps	11,271,000

Oil Collars

Contract Period	NYMEX WTI  Volumes	Weighted- Average Floor  Price		Weighted- Average Ceiling  Price
	(Bbls)	(per Bbl)		(per Bbl)
Second quarter 2014	431,000	$	85.00	$	102.50
Third quarter 2014	973,000	$	85.00	$	102.58
Fourth quarter 2014	923,000	$	85.00	$	102.63
2015	3,366,000	$	85.00	$	94.25
All oil collars	5,693,000

Gas Contracts

Gas Swaps

Contract Period	Volumes	Weighted-Average  Contract Price
	(MMBtu)	(per MMBtu)
Second quarter 2014	23,758,000	$	3.98
Third quarter 2014	24,541,000	$	4.02
Fourth quarter 2014	22,014,000	$	4.02
2015	57,943,000	$	4.04
2016	37,472,000	$	4.17
2017	23,430,000	$	4.21
2018	10,200,000	$	4.31
All gas swaps*	199,358,000

*Gas swaps are comprised of IF El Paso Permian (3%), IF HSC (83%), IF NGPL TXOK (2%), IF NNG Ventura (3%), IF Reliant N/S (8%), and IF CIG N System (1%).

Gas Collars

Contract Period	Volumes	Weighted- Average Floor Price		Weighted- Average Ceiling Price
	(MMBtu)	(per MMBtu)		(per MMBtu)
Second quarter 2014	4,194,000	$	4.38	$	5.29
2015	13,002,000	$	3.98	$	4.30
All gas collars*	17,196,000

*Gas collars are comprised of IF El Paso Permian (3%), IF HSC (64%), IF NGPL TXOK (3%), IF NNG Ventura (6%), IF Reliant N/S (16%), and IF TETCO STX (8%).

NGL Contracts

NGL Swaps

Contract Period	Volumes	Weighted-Average  Contract Price
	(Bbls)	(per Bbl)
Second quarter 2014	1,096,000	$	58.04
Third quarter 2014	960,000	$	58.06
Fourth quarter 2014	861,000	$	58.06
All NGL swaps*	2,917,000

*NGL swaps are comprised of Oil Price Information System (“OPIS”) Mont Belvieu LDH Propane (72%) and OPIS Mont Belvieu NON-LDH Natural Gasoline (28%).

Schedule of fair value of derivatives in accompanying balance sheets

The following tables detail the fair value of derivatives recorded in the accompanying balance sheets, by category:

	As of March 31, 2014
	Derivative Assets			Derivative Liabilities
	Balance Sheet  Classification	Fair Value		Balance Sheet  Classification	Fair Value
	(in thousands)
Commodity contracts	Current assets	$	7,450	Current liabilities	$	60,684
Commodity contracts	Noncurrent assets	13,886		Noncurrent liabilities	7,885
Derivatives not designated as hedging instruments		$	21,336		$	68,569

	As of December 31, 2013
	Derivative Assets			Derivative Liabilities
	Balance Sheet  Classification	Fair Value		Balance Sheet  Classification	Fair Value
	(in thousands)
Commodity contracts	Current assets	$	21,559	Current liabilities	$	26,380
Commodity contracts	Noncurrent assets	30,951		Noncurrent liabilities	4,640
Derivatives not designated as hedging instruments		$	52,510		$	31,020

Schedule of the potential effects of master netting arrangements [Table Text Block]

The following table provides a reconciliation between the gross assets and liabilities reflected on the accompanying balance sheets and the potential effects of master netting arrangements on the fair value of the Company’s derivative contracts:

	Derivative Assets						Derivative Liabilities
	As of						As of
Offsetting of Derivative Assets and Liabilities	March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
	(in thousands)
Gross amounts presented in the accompanying balance sheets	$	21,336		$	52,510		$	(68,569	)	$	(31,020	)
Amounts not offset in the accompanying balance sheets	(21,336		)	(30,652		)	21,336			30,652
Net amounts	$	—		$	21,858		$	(47,233	)	$	(368	)

Schedule of derivative (gain) loss

The following table summarizes the components of the derivative loss presented in the accompanying statements of operations:

	For the Three Months Ended March 31,
	2014			2013
	(in thousands)
Derivative cash settlement loss (gain):
Oil contracts	$	6,758		$	277
Gas contracts	13,404			(9,824		)
NGL contracts	8,778			(2,245		)
Total derivative cash settlement loss (gain) (1)	28,940			(11,792		)
Derivative loss (gain):
Oil contracts	25,192			3,789
Gas contracts	46,057			40,069
NGL contracts	(2,527		)	(1,494		)
Total derivative loss (2)	$	97,662		$	30,572

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⁽¹⁾  Total derivative cash settlement loss (gain) is reported in the derivative cash settlement (loss) gain line item on the condensed consolidated statements of cash flows within net cash provided by operating activities.

⁽²⁾  Total derivative loss is reported in the derivative loss line item on the condensed consolidated statements of cash flows within cash provided by operating activities.