CONSOLIDATED CONDENSED QUARTERLY DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED CONDENSED QUARTERLY DATA (UNAUDITED) [Abstract]
Interest income	$ 9,361	$ 9,474	$ 9,613	$ 9,637	$ 9,646	$ 9,613	$ 9,565	$ 9,469	$ 38,085	$ 38,293	$ 39,000
Interest expense	1,773	1,859	1,948	2,079	2,255	2,406	2,489	2,533	7,659	9,683	11,340
NET INTEREST INCOME	7,588	7,615	7,665	7,558	7,391	7,207	7,076	6,936	30,426	28,610	27,660
Provision for loan losses	105	105	105	105	150	150	150	225	420	675	1,255
Non-interest income	2,103	1,679	1,716	1,735	1,756	1,711	1,653	1,462	7,837	6,916	6,296
Investment securities gains, net	43	240	213	108	(17)	117	114	120	604	334	99
Non-interest expenses	4,945	4,932	4,565	4,855	4,489	4,498	4,679	4,743	19,297	18,409	18,043
Income before provision for income taxes	4,684	4,497	4,924	4,441	4,491	4,387	4,014	3,550	18,546	16,442	14,658
Provision for income taxes	1,135	1,033	1,171	992	1,014	1,009	867	720	4,331	3,610	3,156
NET INCOME	$ 3,549	$ 3,464	$ 3,753	$ 3,449	$ 3,477	$ 3,378	$ 3,147	$ 2,830	$ 14,215	$ 12,832	$ 11,502
Earnings Per Share Basic (in dollars per share)	$ 1.22	$ 1.19	$ 1.29	$ 1.18	$ 1.18	$ 1.15	$ 1.07	$ 0.96	$ 4.88	$ 4.36	$ 3.90
Earnings Per Share Diluted (in dollars per share)	$ 1.22	$ 1.19	$ 1.29	$ 1.18	$ 1.18	$ 1.15	$ 1.07	$ 0.96	$ 4.88	$ 4.36	$ 3.90