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Earnings Per Share (Narrative) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Earnings Per Share [Abstract]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 60,650 0 60,650 0  
Share price $ 31.61 $ 39.16 $ 31.61 $ 39.16 $ 33.00