Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Net earnings		$ 2,277	$ 2,777
Weighted average common shares outstanding - basic	[1]	3,556,798	3,502,686
Assumed exercise of stock options	[1]	95,429	97,860
Weighted average common shares outstanding - diluted	[1]	3,652,227	3,600,546
Net earnings per share :
Basic	[1],[2]	$ 0.64	$ 0.79
Diluted	[1],[2]	$ 0.62	$ 0.77

[1] Share and per share values for the period ended March 31, 2015 have been adjusted to give effect to the 5% stock dividend paid during December 2015.

[2] Per share amounts for the period ended March 31, 2015 have been adjusted to give effect to the 5% stock dividend paid during December 2015.