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Earnings Per Share (Narrative) (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from earnings per share calculation 11,674 4,500,000 1,800,000 2,200,000
Restricted Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from earnings per share calculation   300,000