Taxes Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Taxes [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Significant components of the provision for (benefit from) income taxes are as follows:

	Year Ended December 31
	2012			2011			2010
	(In thousands)
Current:
Federal	$	(20,022	)	$	(20,164	)	$	34,304
State	575			1,212			2,283
Total current	(19,447		)	(18,952		)	36,587
Deferred:
Federal	(322,104		)	13,214			(18,506		)
State	7,834			(1,851		)	(367		)
Total deferred	(314,270		)	11,363			(18,873		)
	$	(333,717	)	$	(7,589	)	$	17,714

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the statutory federal income tax provision (benefit) at the statutory rate to the actual provision for (benefit from) income taxes follows:

	Year Ended December 31
	2012			2011			2010
	(In thousands)
Income tax provision (benefit) at statutory rate	$	(356,185	)	$	46,933		$	61,800
Percentage depletion allowance	(40,698		)	(61,971		)	(49,152		)
Goodwill	56,916			—			—
State taxes, net of effect of federal taxes	(23,423		)	(3,055		)	2,299
Change in valuation allowance	31,832			2,416			(383		)
Other, net	(2,159		)	8,088			3,150
	$	(333,717	)	$	(7,589	)	$	17,714

In 2012, 2011 and 2010, compensatory stock opt

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Significant components of the Company's deferred tax assets and liabilities that result from carryforwards and temporary differences between the financial statement basis and tax basis of assets and liabilities are summarized as follows:

	December 31
	2012			2011
	(In thousands)
Deferred tax assets:
Net operating loss carryforwards	$	496,330		$	324,393
Alternative minimum tax credit carryforwards	150,014			151,404
Reclamation and mine closure	104,570			93,914
Goodwill	43,839			—
Acquired sales contracts	38,735			44,717
Workers' compensation	32,241			26,266
Retiree benefit plans	32,087			24,456
Other, primarily accrued liabilities	113,777			120,993
Gross deferred tax assets	1,011,593			786,143
Valuation allowance	(34,663		)	(2,831		)
Total deferred tax assets	976,930			783,312
Deferred tax liabilities:
Plant and equipment	1,411,446			1,566,769
Deferred development	77,013			67,728
Investment in tax partnerships	72,513			66,502
Other	12,780			17,015
Total deferred tax liabilities	1,573,752			1,718,014
Net deferred tax asset (liability)	(596,822		)	(934,702		)
Current asset (liability)	67,360			42,051
Non-current deferred tax asset (liability)	$	(664,182	)	$	(976,753	)

Summary of Income Tax Contingencies [Table Text Block]

A reconciliation of the beginning and ending amounts of gross unrecognized tax benefits follows:

	(In thousands)
Balance at January 1, 2010	$	6,670
Additions based on tax positions related to the current year	1,493
Additions for tax positions of prior years	85
Reductions for tax positions of prior years	(3,830		)
Balance at December 31, 2010	4,418
Additions based on tax positions related to the current year	1,626
Additions for tax positions of prior years	2,754
Balance at December 31, 2011	8,798
Additions based on tax positions related to the current year	409
Additions for tax positions of prior years	21,943
Balance at December 31, 2012	$	31,150

If recognized, the e