EARNINGS PER SHARE - Calculation of earnings per share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share [Abstract]
Net income	$ 4,077	$ 4,112	$ 3,660
Preferred stock net accretion		(78)	(21)
Preferred stock dividends paid	(216)	(446)	(441)
Cumulative preferred stock dividends earned
Net income available to common shareholders	$ 3,861	$ 3,588	$ 3,198
Weighted average common stock outstanding - basic	1,690	1,689	1,687
Weighted average common and common equivalent stock outstanding - diluted	1,690	1,689	1,687
Earnings per common and common equivalent share
Basic	$ 2.28	$ 2.12	$ 1.90
Diluted	$ 2.28	$ 2.12	$ 1.90