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Basis Of Presentation And Significant Accounting Policies Basis of Presentation And Significant Accounting Policies (Earnings per share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Numerator:    
Net income $ 74,819 $ 81,762
Less: earnings distributed to participating securities (134) 0
Less: undistributed earnings allocated to participating securities (383) 0
Numerator for basic earnings per share 74,302 81,762
Add back: undistributed Earnings Allocated to Participating Securities 383 0
Less: undistributed earnings reallocated to participating securities (379) 0
Numerator for diluted earnings per share $ 74,306 $ 81,762
Denominator:    
Basic shares outstanding 383,991 384,228
Effect of dilutive securities 3,815 6,093
Diluted shares outstanding 387,806 390,321
Earnings Per Share [Abstract]    
Earnings Per Share, Basic $ 0.19 $ 0.21
Earnings Per Share, Diluted $ 0.19 $ 0.21