Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Numerator:
Net income (in dollars)	$ 1,020	$ 1,029	$ 1,029
Denominator:
Weighted average shares (Basic)	4,477	4,427
Dilutive effect of outstanding options and nonvested shares of restricted stock	125	185
Weighted average shares including assumed conversions (Diluted)	4,602	4,612
Basic net income per share (in dollars per share)	$ 0.23	$ 0.23
Diluted net income per share (in dollars per share)	$ 0.22	$ 0.22