QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
QUARTERLY FINANCIAL DATA (UNAUDITED)
Interest Income	$ 25,550	$ 25,377	$ 25,036	$ 25,316	$ 26,349	$ 26,832	$ 27,678	$ 27,909	$ 101,279	$ 108,768	$ 121,611
Net Interest Income	23,214	22,953	22,535	22,598	23,223	23,331	23,750	23,778	91,300	94,082	99,848
Net Income	$ 7,398	$ 7,632	$ 7,324	$ 3,991	$ 7,279	$ 6,986	$ 6,982	$ 6,011	$ 26,345	$ 27,258	$ 23,813
Earnings per Common Share
Basic (in dollars per share)	$ 0.36	$ 0.36	$ 0.35	$ 0.19	$ 0.34	$ 0.32	$ 0.32	$ 0.32	$ 1.26	$ 1.31	$ 1.03
Fully Diluted (in dollars per share)	$ 0.36	$ 0.36	$ 0.35	$ 0.19	$ 0.34	$ 0.32	$ 0.32	$ 0.32	$ 1.26	$ 1.30	$ 1.03
Change in amount of earnings per share reported in first quarter 10Q due to redemption of preferred stock in the first quarter (in dollars per share)										$ 0.06