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Earnings Per Share (Antidilutive Effect on Weighted Average Shares) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share [Abstract]        
Employee equity incentive plans (in shares) 4,302 4,212 4,234 4,338