Derivative Instruments And Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2012

Derivative Instruments And Hedging Activities [Abstract]

Volumes Under Derivative Contracts Related To Oil And Gas Producing Activities

Production Period	Instrument Type	Average Monthly Volumes	Weighted Average Price (1)
Crude Oil:			(per barrel)
October 2012 — December 2012...................................................	Collar	75.0 MBbl	$  96.67 — $118.57(2)
October 2012 — December 2012...................................................	Collar	80.3 MBbl	$  99.77 — $118.71
October 2012 — December 2012...................................................	Swap	103.7 MBbl	$92.15
January 2013 — December 2013...................................................	Swap	88.9 MBbl	$95.28
January 2013 — December 2013...................................................	Collar	133.3 MBbl	$  98.44 — $115.85
Natural Gas:			(per Mcf)
October 2012 — December 2012...................................................	Swap	776.7 Mmcf	$4.31
October 2012 — December 2012...................................................	Collar	130.0 Mmcf	$4.75 — $5.13
January 2013 — December 2013...................................................	Swap	500.0 Mmcf	$4.09

(1) The prices quoted in the table above are NYMEX Henry Hub for natural gas.  Our oil contracts are indexed to the Brent crude oil price unless otherwise indicated.

(2) This contract is priced using NYMEX West Texas Intermediate for crude oil.

Derivatives Designated As Hedging Instruments

	As of September 30, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Asset Derivatives:
Natural gas contracts	Other current assets	$	2,824	Other current assets	$	12,957
Oil contracts	Other current assets		3,184	Other current assets		8,567
Oil contracts	Other assets		1,227	Other assets		-
Natural gas contracts	Other assets		115	Other assets		857
Interest rate swaps	Other assets		-	Other assets		327
		$	7,350		$	22,708
	As of September 30, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Liability Derivatives:
Oil contracts	Accrued liabilities	$	19,840	Accrued liabilities	$	886
Interest rate swaps	Accrued liabilities		493	Accrued liabilities		202
Oil contracts	Other long-term liabilities		3,234	Other long-term liabilities		1,711
Interest rate swaps	Other long-term liabilities		141	Other long-term liabilities		-
		$	23,708		$	2,799

Derivatives Not Designated As Hedging Instruments

	As of September 30, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Asset Derivatives:
Natural gas contracts	Other current assets	$	1,386	Other current assets	$	-
Foreign exchange forwards	Other current assets		116	Other current assets		55
		$	1,502		$	55
	As of September 30, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Liability Derivatives:
Foreign exchange forwards	Accrued liabilities	$	-	Accrued liabilities	$	159
		$	-		$	159

Impact Of Derivative Instruments On Accumulated Comprehensive Income (Loss)

		Gain (Loss) Recognized in OCI on Derivatives
		(Effective Portion)
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2012		2011		2012		2011
Oil and natural gas commodity contracts	$	(19,868)	$	33,432	$	(20,664)	$	43,373
Interest rate swaps		(168)		456		(494)		918
	$	(20,036)	$	33,888	$	(21,158)	$	44,291

Gain (Loss) Reclassified From Accumulated OCI Into Income

			Gain (Loss) Reclassified from Accumulated OCI
			into Income
	Location of Gain (Loss)		(Effective Portion)
	Reclassified from		Three Months Ended				Nine Months Ended
	Accumulated OCI into Income		September 30,				September 30,
	(Effective Portion)		2012		2011		2012		2011
Oil and natural gas commodity contracts	Oil and gas revenue	$	414	$	(1,287)	$	8,546	$	(19,473)
Interest rate swaps	Net interest expense		(121)		(522)		(434)		(1,513)
		$	293	$	(1,809)	$	8,112	$	(20,986)

Impact Of Non Designated Derivative Instruments On Income Statement

			Gain (Loss) Recognized in Income on Derivatives
	Location of Gain (Loss)		Three Months Ended				Nine Months Ended
	Recognized in Income on		September 30,				September 30,
	Derivatives		2012		2011		2012		2011
Natural gas commodity contracts	Hedge ineffectiveness and non-hedge gain on commodity derivative contracts	$	633	$	-	$	633	$	-
Foreign exchange forwards	Other income (expense)		217		(381)		381		(234)
		$	850	$	(381)	$	1,014	$	(234)