Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Schedule Of Effective Income Tax Rate Reconciliation

	Year Ended December 31,
	2011			2010			2009
Statutory rate		35.0	%		35.0	%		35.0	%
Foreign provision		(2.0	)		(4.3	)		(1.1	)
Effect of Australian reorganization	(21.2		)	—				—
IRC Section 199 deduction	—			—				(1.2	)
CDI equity pick up in excess of tax basis	—			—				3.0
Nondeductible goodwill impairment (Note 2)	—				(4.4	)	—
Valuation allowance on certain deferred tax assets	—				(3.1	)	—
Other		(1.7	)		1.0			0.9
Effective rate		10.1	%		24.2	%		36.6	%

Schedule Of Components Of Income Tax Expense (Benefit)

			Year Ended December 31,
		2011			2010			2009
Current	$	16,306		$	7,238		$	160,829
Deferred		(1,403	)		(46,836	)		(65,007	)
	$	14,903		$	(39,598	)	$	95,822

Domestic	$	119	$	(57,165	)	$	94,388
Foreign		14,784		17,567			1,434
	$	14,903	$	(39,598	)	$	95,822

Schedule Of Deferred Tax Assets And Liabilities

		2011			2010
Deferred tax liabilities:
Depreciation and depletion	$	396,355		$	384,313
OID on Convertible Notes		37,067			34,169
Equity investments in production facilities		76,911			69,495
Prepaid and other		14,779			15,616
Total deferred tax liabilities	$	525,112		$	503,593
Deferred tax assets:
Net operating loss carryforward	$	(34,987	)	$	(38,718	)
Asset retirement obligations		(88,279	)		(81,345	)
Reserves, accrued liabilities and other		(39,995	)		(27,588	)
Total deferred tax assets	$	(163,261	)	$	(147,651	)
Valuation allowance		14,310			8,497
Net deferred tax liability	$	376,161		$	364,439
Deferred income tax is presented as:
Current deferred tax asset	$	(41,449	)	$	(49,200	)
Noncurrent deferred tax liabilities		417,610			413,639
Net deferred tax liability	$	376,161		$	364,439

Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits

	2011		2010		2009
Balance at January 1,	$	4,085	$	3,417	$	5,183
Additions based on tax positions related to current year		2,785	—		—
Additions for tax positions of prior years		215		668		773
Reductions for tax positions of prior years	—		—			(2,539	)
Balance at December 31,	$	7,085	$	4,085	$	3,417