STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Shares Outstanding , Beginning balance	236,059	264,156
Shares Granted at fair value	0	0
Shares Exercised	(2,518)	(24,780)
Shares Expired	0	0
Shares Forfeited	(1)	(3,317)
Shares Outstanding, Ending balance	233,540	236,059
Shares, Exercisable	233,540	236,059
Weighted Average Exercise Price Outstanding, Beginning balance	$ 18.49	$ 17.90
Weighted Average Exercise Price Granted at fair value	$ 0	$ 0
Weighted Average Exercise Price Exercised	$ 13.19	$ 12.25
Weighted Average Exercise Price Expired	$ 0	$ 0
Weighted Average Exercise Price Forfeited	$ 13.19	$ 18.25
Weighted Average Exercise Price Outstanding, Ending balance	$ 18.55	$ 18.49
Weighted Average Exercise Price Exercisable	$ 18.55	$ 18.49
Aggregate Intrinsic Value Outstanding, Beginning balance	$ 164,304	$ 175,911
Aggregate Intrinsic Value Exercised	10,248	88,607
Aggregate Intrinsic Value Outstanding, Ending balance	225,938	164,304
Aggregate Intrinsic Value Exercisable	$ 225,938	$ 164,304
Weighted-Average Contractual Life Remaining In Years Outstanding (in years)	1 year	1 year
Weighted-Average Contractual Life Remaining In Years Exercisable (in years)	1 year	1 year