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Earnings Per Share (Narrative) (Details)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]      
Weighted average unvested shares outstanding 0.3 0.3 0.3
Anti-dilutive stock options excluded from dilutive earnings per share calculation 0 0 0.1
5.417% Series 1 Cumulative Convertible Preferred [Member]
     
Earnings Per Share [Abstract]      
Cumulative convertible preferred share, dividend rate 5.417% 5.417% 5.417%