Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net earnings		$ 2,529	$ 2,174	$ 7,922	$ 5,950
Weighted average common shares outstanding - basic	[1]	3,339,467	3,333,539	3,337,607	3,324,628
Assumed exercise of stock options	[1]	109,902	59,120	101,679	47,574
Weighted average common shares outstanding - diluted	[1]	3,449,369	3,392,659	3,439,286	3,372,202
Net earnings per share:
Basic (in dollars per share)	[1],[2]	$ 0.76	$ 0.65	$ 2.37	$ 1.79
Diluted (in dollars per share)	[1],[2]	$ 0.73	$ 0.64	$ 2.30	$ 1.76

[1] Share and per share values for the periods ended September 30, 2014 have been adjusted to give effect to the 5% stock dividend paid during December 2014.

[2] Per share amounts for the periods ended September 30, 2014 have been adjusted to give effect to the 5% stock dividend paid during December 2014.