Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Reconciliation Of Income Tax Expense (Benefit)

	2011		2010		2009
	(In thousands)
Income tax expense (benefit) computed by applying the statutory rate	$	111,651	$	83,027	$	(30,704	)
State income tax, net of federal benefit		8,941		6,030		(2,409	)
Statutory depletion and other		2,543		1,680		887
Income tax expense (benefit)	$	123,135	$	90,737	$	(32,226	)

Schedule Of Total Provision For Income Taxes

	2011			2010			2009
	(In thousands)
Current taxes:
Federal	$	(3,159	)	$	(6,856	)	$	(5,124	)
State		743			(3,079	)		4,901
		(2,416	)		(9,935	)		(223	)
Deferred taxes:
Federal		109,363			88,021			(23,510	)
State		16,188			12,651			(8,493	)
		125,551			100,672			(32,003	)
Total provision	$	123,135		$	90,737		$	(32,226	)

Schedule Of Deferred Tax Assets And Liabilities

	2011			2010
	(In thousands)
Deferred tax assets:
Allowance for losses and nondeductible accruals	$	53,376		$	47,742
Net operating loss carryforward		47,683			2,926
Alternative minimum tax credit carryforward		0			0
		101,059			50,668
Deferred tax liability:
Depreciation, depletion, amortization and impairment		(773,246	)		(593,237	)
Net deferred tax liability		(672,187	)		(542,569	)
Current deferred tax asset		10,936			13,537
Non-current—deferred tax liability	$	(683,123	)	$	(556,106	)