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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Distributed earnings allocated to common shares	$ 340	$ 295	$ 999	$ 862
Undistributed earnings allocated to common shares	2,136	2,005	5,294	4,868
Net earnings allocated to common shares	2,476	2,300	6,293	5,730
Net earnings allocated to participating securities	3	3	9	6
Dividends on convertible preferred shares	244	244	731	731
Net Income allocated to common shares and participating securities	$ 2,723	$ 2,547	$ 7,033	$ 6,467
Weighted average shares outstanding for basic earnings per share	4,797	4,874	4,825	4,888
Dilutive effect of stock compensation	70	47	73	41
Dilutive effect of convertible shares	1,459	1,455	1,458	1,455
Weighted average shares outstanding for diluted earnings per share	6,326	6,376	6,356	6,384
Basic earnings per common share	$ 0.52	$ 0.47	$ 1.31	$ 1.17
Diluted earnings per common share	$ 0.43	$ 0.40	$ 1.11	$ 1.01

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Net earnings allocated to common shares.

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The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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