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Basic and Diluted Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2016
Basic and Diluted Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Year ended December 31
(Dollars in thousands, except share and per share data)20162015
Basic and diluted:
Net earnings$8,150$7,858
Weighted average common shares outstanding3,643,5043,643,428
Net earnings per share$2.24$2.16