Derivative Financial Instruments

3 Months Ended

Mar. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 10 - Derivative Financial Instruments

The Company has entered into various commodity derivative contracts to mitigate a portion of the exposure to potentially adverse market changes in commodity prices and the associated impact on cash flows. The Company’s derivative contracts in place include swap and collar arrangements for oil, gas, and NGLs. As of March 31, 2012, the Company has commodity derivative contracts in place through the fourth quarter of 2014 for a total of 9.7 million Bbls of anticipated oil production, 69.9 million MMBtu of anticipated gas production, and 1.1 million Bbls of anticipated NGL production.

The Company’s commodity derivatives are measured at fair value and are included in the accompanying balance sheets as derivative assets and liabilities. The fair value of the commodity derivative contracts was a net asset of $21.9 million and $31.2 million at March 31, 2012, and December 31, 2011, respectively.

Discontinuance of Cash Flow Hedge Accounting

Prior to January 1, 2011, the Company designated its commodity derivative contracts as cash flow hedges, for which unrealized changes in fair value were recorded to accumulated other comprehensive income (loss) (“AOCIL”), to the extent the hedges were effective. As of January 1, 2011, the Company elected to de-designate all of its commodity derivative contracts that had been previously designated as cash flow hedges at December 31, 2010. As a result, subsequent to December 31, 2010, the Company recognized all gains and losses from changes in commodity derivative fair values immediately in earnings rather than deferring any such amounts in AOCIL. The Company had no derivatives designated as cash flow hedges for the three-month periods ended March 31, 2012, and 2011, and as such, no ineffectiveness was recognized in earnings for the respective periods.

As a result of discontinuing hedge accounting on January 1, 2011, such fair values at December 31, 2010, were frozen in AOCIL as of the de-designation date and are reclassified into earnings as the original derivative transactions settle. As of March 31, 2012, AOCIL included $115,000 of net unrealized gains, net of income tax, on commodity derivative contracts that had been previously designated as cash flow hedges. The Company expects to reclassify into earnings from AOCIL after-tax net gains of $1.3 million related to de-designated commodity derivative contracts during the next twelve months. Please refer to Note 11 - Fair Value Measurements for more information regarding the Company’s derivative instruments, including our valuation techniques.

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

	As of March 31, 2012
	Derivative Assets			Derivative Liabilities
	Balance Sheet  Classification	Fair Value		Balance Sheet  Classification	Fair Value
	(in thousands)
Commodity Contracts	Current Assets	$	67,457	Current Liabilities	$	50,764
Commodity Contracts	Noncurrent Assets	30,595		Noncurrent Liabilities	25,397
Derivatives not designated as hedging instruments		$	98,052		$	76,161

	As of December 31, 2011
	Derivative Assets			Derivative Liabilities
	Balance Sheet  Classification	Fair Value		Balance Sheet  Classification	Fair Value
	(in thousands)
Commodity Contracts	Current Assets	$	55,813	Current Liabilities	$	42,806
Commodity Contracts	Noncurrent Assets	31,062		Noncurrent Liabilities	12,875
Derivatives not designated as hedging instruments		$	86,875		$	55,681

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

	For the Three Months Ended March 31,
	2012			2011
	(in thousands)
Cash settlement (gain) loss:
Oil contracts	$	8,299		$	6,730
Gas contracts	(15,212		)	(1,727		)
NGL contracts	1,477			1,414
Total cash settlement (gain) loss	$	(5,436	)	$	6,417
Unrealized (gain) loss on change in fair value:
Oil contracts	$	29,491		$	67,367
Gas contracts	(17,634		)	4,260
NGL contracts	(4,205		)	10,385
Total net unrealized loss on change in fair value	$	7,652		$	82,012
Total unrealized and realized derivative loss	$	2,216		$	88,429

The following table summarizes the effect of derivative instruments on AOCIL and the accompanying statements of operations (net of income tax):

		Location in Consolidated Statements of Operations	For the Three Months Ended March 31,
	Derivatives		2012			2011
			(in thousands)
Amount reclassified from AOCIL to realized hedge gain (loss)	Commodity Contracts	Realized hedge gain (loss)	$	(1,034	)	$	927

The Company realized a net hedge gain of $1.7 million and a net hedge loss of $1.4 million from its commodity derivative contracts for the three months ended March 31, 2012, and 2011, respectively, shown net of income tax in the table above. Realized hedge gains and losses are comprised of realized cash settlements on commodity derivative contracts that were previously designated as cash flow hedges and are reported in the total operating revenues and other income section of the accompanying statements of operations. 

Credit Related Contingent Features

As of March 31, 2012, and through the filing date of this report, all of the Company’s derivative counterparties were members of the Company’s credit facility syndicate. The Company’s obligations under its credit facility and derivative contracts are secured by liens on substantially all of the Company’s proved oil and gas properties.

Convertible Note Derivative Instruments

The contingent interest provision of the 3.50% Senior Convertible Notes is an embedded derivative instrument. As of March 31, 2012, and December 31, 2011, the fair value of this derivative was determined to be immateria