Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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

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-Name Accounting Standards Codification

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-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

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+ Details

Earnings (Loss) Per Share (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Apr. 12, 2012	Mar. 31, 2012 10% convertible senior notes due 2018, net of discount [Member]	Dec. 31, 2011 10% convertible senior notes due 2018, net of discount [Member]	Mar. 31, 2011 10% convertible senior notes due 2018, net of discount [Member]
Earnings (Loss) Per Share [Line Items]
Potential Conversion of convertible senior notes				$ 400		$ 400
Interest rate of convertible senior notes			7.875%	10.00%	10.00%	10.00%
Earnings (Loss) Per Share (Textual) [Abstract]
Shares issuable upon conversion of 10% convertible senior notes not included in the computation of diluted loss per share	35.1	35.1
Shares not included in the computation of diluted loss per share	7.8	7.3
Initial conversion price of 10% convertible senior notes not included in the computation of diluted loss per share	$ 11.40	$ 11.40