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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Components Of Income (Loss) Before Income Taxes


	Year Ended December 31,
	2011			2010		2009
Domestic	$	404,422		$	339,382	$	72,079
Foreign		(2,990	)		3,578		6,674

	$	401,432		$	342,960	$	78,753

Schedule Of The Provision For (Benefit From) Income Taxes


	Year Ended December 31,
	2011			2010		2009
Current
Federal	$	120,018		$	97,822	$	(3,049	)
State		8,729			8,128		(2,306	)
Foreign		(395	)		1,464		(94	)

		128,352			107,414		(5,449	)

Deferred
Federal		6,732			7,083		29,824
State		7,682			6,829		660
Foreign		(300	)		241		723

		14,114			14,153		31,207

Total provision	$	142,466		$	121,567	$	25,758

Reconciliation Of Taxes Computed At The Statutory Rate To Income Tax Expense


	Year Ended December 31,
	2011			2010			2009
Provision for federal income tax at statutory rate	$	140,501		$	120,036		$	27,563
State income tax provision net of federal income tax effect		10,745			9,372			462
Foreign tax		(695	)		1,705			629
Foreign losses (earnings)		1,047			(1,252	)		(2,336	)
Manufacturing deduction		(9,905	)		(8,750	)		—
Contingent tax liability		(20	)		(411	)		(1,004	)
Other, net		793			867			444

	$	142,466		$	121,567		$	25,758

Schedule Of Deferred Tax Assets And Liabilities


	2011			2010
Net operating loss carryforward	$	13,958		$	15,018
Credit carryforward		769			1,729
Accruals		29,002			24,693
Allowance for doubtful accounts		1,329			878
Inventories		7,321			6,893
Other		5,900			6,119

Deferred taxes assets—total		58,279			55,330

Property, plant and equipment		(344,535	)		(328,635	)
Turnaround costs		(11,073	)		(13,091	)
Other		(914	)		(795	)

Deferred tax liabilities—total		(356,522	)		(342,521	)

Valuation allowance		(12,937	)		(11,039	)

Total net deferred tax liabilities	$	(311,180	)	$	(298,230	)


Balance sheet classifications
Current deferred tax asset	$	19,611		$	17,288
Deferred tax liability		(330,791	)		(315,518	)

Total net deferred tax liabilities	$	(311,180	)	$	(298,230	)

Schedule Of Changes In Gross Unrecognized Tax Benefits


	2011			2010			2009
Beginning balance	$	3,141		$	4,873		$	5,054
Additions based on tax position related to current year		—			—			678
(Reductions) additions for tax positions for prior years		—			(26	)		711
Reductions due to tax settlements		—			(1,389	)		—
Reductions due to statutes of limitations expiring		(19	)		(317	)		(1,570	)

Ending balance	$	3,122		$	3,141		$	4,873

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

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