The federal corporate income tax rate on built-in gains on taxable sales in 2011.

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- Definition

The gallons of alternative fuel mixture credit exchanged for the cellulosic biofuel producer credit.

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- Definition

The tax benefit recognized related to the exchange of the alternative fuel mixture credit for the cellulosic biofuel producer credit.

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

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-Name Accounting Standards Codification
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-Paragraph 1
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 47
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
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-Subparagraph (SAB TOPIC 6.I)
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Reflects the known or estimated financial effect of the event, or transaction that occurred between the balance sheet date and the date the financial statements are issued or available to be issued.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Income Taxes (Tax Rates) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Effective Tax Rates, Continuing Operations [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			35.00%
Effective Income Tax Rate, Continuing Operations	15.40%	13.40%	18.70%	12.40%
Built in Gain 2011 Tax Rate			0.00%
Exchange of Alternative Fuel Credits Amount	30 million gallons
Exchange of Alternative Fuel Tax Benefit	$ 4.1
Income Tax [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount			$ 16