Derivative Instruments And Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments And Hedging Activities [Abstract]

Derivatives Designated As Hedging Instruments

	As of December 31, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Asset Derivatives:
Natural gas contracts	Other current assets	$	-	Other current assets	$	12,957
Oil contracts	Other current assets		-	Other current assets		8,567
Natural gas contracts	Other assets, net		-	Other assets, net		857
Interest rate swaps	Other assets, net		-	Other assets, net		327
		$	-		$	22,708
Liability Derivatives:
Oil contracts	Accrued liabilities	$	-	Accrued liabilities	$	886
Interest rate swaps	Accrued liabilities		-	Accrued liabilities		202
Oil contracts	Other long-term liabilities		-	Other long-term liabilities		1,712
		$	-		$	2,800

Derivatives Not Designated As Hedging Instruments

	As of December 31, 2012			As of December 31, 2011
	Balance Sheet		Fair	Balance Sheet		Fair
	Location		Value	Location		Value
Asset Derivatives:
Oil contracts	Other current assets	$	5,800	Other current assets	$	-
Foreign exchange forwards	Other current assets		146	Other current assets		55
		$	5,946		$	55
Liability Derivatives:
Oil contracts	Accrued liabilities	$	15,777	Accrued liabilities	$	-
Interest rate swaps	Accrued liabilities		489	Accrued liabilities		-
Foreign exchange forwards	Accrued liabilities		-	Accrued liabilities		159
Interest rate swaps	Other long-term liabilities		32	Other long-term liabilities		-
		$	16,298		$	159

Impact Of Derivative Instruments On Accumulated Comprehensive Income (Loss)

		Gain (Loss) Recognized in OCI on Derivatives
		(Effective Portion)
		Year Ended December 31,
		2012		2011		2010
Oil and natural gas commodity contracts	$	(12,860)	$	28,749	$	(6,486)
Interest rate swaps		(81)		1,294		(1,213)
	$	(12,941)	$	30,043	$	(7,699)

Gain (Loss) Reclassified From Accumulated OCI Into Income

			Gain (Loss) Reclassified from
	Reclassified from		Accumulated OCI into Income
	Location of Gain (Loss)		(Effective Portion)
	Accumulated OCI into Income		Year Ended December 31,
	(Effective Portion)		2012		2011		2010
Oil and natural gas commodity contracts	Income (loss) from discontinued operations, net of tax	$	3,184	$	(21,659)	$	25,575
Interest rate swaps	Net interest expense		(523)		(2,010)		(1,849)
		$	2,661	$	(23,669)	$	23,726

Impact Of Non Designated Derivative Instruments On Income Statement

			Gain (Loss) Recognized in Income
	Location of Gain (Loss)		on Derivatives
	Recognized in Income		Year Ended December 31,
	on Derivatives		2012		2011		2010
Oil and natural gas commodity contracts	Income (loss) from discontinued operations, net of tax	$	5,550	$	-	$	1,088
Oil and natural gas commodity contracts	Non-hedge loss on commodity derivative contracts		(10,507)		-		-
Interest rate swaps	Other income (expense), net		(567)		-		-
Foreign exchange forwards	Other income (expense), net		411		249		(2,560)
		$	(5,113)	$	249	$	(1,472)