XML 124 R101.htm IDEA: XBRL DOCUMENT

Quarterly Financial Data - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Refinancing of Debt	Jun. 30, 2012 Refinancing of Debt	Dec. 31, 2012 State Income Tax	Dec. 31, 2012 Plant Closure	Dec. 31, 2011 Discontinued Operation Or Asset Disposals	Sep. 30, 2011 Discontinued Operation Or Asset Disposals	Jun. 30, 2011 Discontinued Operation Or Asset Disposals	Mar. 31, 2011 Discontinued Operation Or Asset Disposals	Jun. 30, 2011 Medical Benefits Reserves	Mar. 31, 2012 Alternative Fuel Mixture Credits	Mar. 31, 2012 Cellulosic Biofuel Tax Credits	Mar. 31, 2012 Alternative Energy Tax Credits
Quarterly Financial Data [Line Items]
Alternative energy tax credits													$ 95,500,000		$ 23,000,000
Provision for income taxes	216,739,000	85,477,000	(52,331,000)											118,500,000
Decrease (Increase) in net income per share				$ 0.14	$ 0.025	$ (0.03)	$ 0.01	$ 0.005	$ 0.010	$ 0.010	$ 0.020	$ (0.01)		$ 0.24
Decrease (Increase)in net income				$ 13,500,000	$ 2,500,000	$ (3,400,000)	$ 1,400,000	$ 500,000	$ 1,000,000	$ 1,200,000	$ 2,100,000	$ (1,000,000)

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

+ References+ Details