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Earnings Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Anti-dilutive securities not included in the computation of diluted earnings per share (in shares) 6,457 0 308,195 149,348