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Earnings Per Share (Anti-dilutive Shares) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Joint venture shares
Anti-dilutive shares
Anti-dilutive shares	298	298	298
Stock options
Anti-dilutive shares
Anti-dilutive shares	0	0	44
3.00% convertible senior unsecured notes
Anti-dilutive shares
Anti-dilutive shares	16,992	0	0
Series J convertible perpetual preferred stock
Anti-dilutive shares
Anti-dilutive shares	15,635	0	0
1.50% convertible senior unsecured notes
Anti-dilutive shares
Anti-dilutive shares	11,567	0	0

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.

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