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Earnings Per Share (Weighted Average Common Shares Outstanding) (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Weighted average common shares outstanding (shares) 12,325,718 12,293,998 12,316,497 12,282,522
Dilutive effect of employee stock options and nonvested share awards (shares)
Weighted average diluted common shares outstanding (shares) 12,325,718 12,293,998 12,316,497 12,282,522