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Earnings Per Share of Common Stock (Antidilutive Shares Excluded from Computation of Earnings per Share) (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share [Abstract]        
Average number of stock options 8,401,821 0 8,401,821 0