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Basic and Diluted Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Basic and Diluted Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Quarter ended March 31,
(Dollars in thousands, except share and per share data)20182017
Basic and diluted:
Net earnings$2,195$1,890
Weighted average common shares outstanding3,643,6833,643,541
Net earnings per share$0.60$0.52