Summary of Significant Accounting Policies (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Net earnings available to common shareholders	$ 6,367		$ 4,484		$ 2,043
Weighted average common shares outstanding - basic (in shares)	2,922,031		2,916,390		2,898,094
Assumed exercise of stock options	25,090		0		1,131
Weighted average common shares outstanding - diluted (in shares)	2,947,121		2,916,390		2,899,226
Earnings per share:
Basic (in dollars per share)	$ 2.18	[1]	$ 1.54	[1]	$ 0.70	[1]
Diluted (in dollars per share)	$ 2.16	[1]	$ 1.54	[1]	$ 0.70	[1]

[1] All per share amounts have been adjusted to give effect to the 5% stock dividends paid during December 2012, 2011 and 2010.