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Earnings Per Share (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Share [Abstract]        
Common stock were excluded from the calculation of incremental shares 1,054,067 235,867 527,033 157,317