EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net Income
Net income	$ 6,982	$ 7,626	$ 12,993	$ 12,172
Preferred dividends and accretion	(473)	(764)	(1,236)	(1,527)
Net income available to common shareholders	6,509	6,862	11,757	10,645
Net income available to common shareholders and assumed conversions	$ 6,509	$ 6,862	$ 11,757	$ 10,645
Weighted Average Shares
Net income available to common shareholders (in shares)	20,258,692	20,183,924	20,235,338	20,159,924
Effect of dilutive shares/warrants (in shares)	61,118	35,782	57,622	41,841
Net income available to common shareholders and assumed conversions (in shares)	20,319,810	20,219,706	20,292,960	20,201,765
Per Share Amount
Net income available to common shareholders (in dollars per share)	$ 0.32	$ 0.34	$ 0.58	$ 0.53
Net income available to common shareholders and assumed conversions (in dollars per share)	$ 0.32	$ 0.34	$ 0.58	$ 0.53
Stock options
Anti-dilutive securities
Common shares not considered in computing diluted earnings per share	296,972	251,116	274,313	251,116
Stock warrants
Anti-dilutive securities
Common shares not considered in computing diluted earnings per share	571,906	571,906	571,906	571,906