EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Income
Net income	$ 7,324	$ 6,982	$ 11,315	$ 12,993
Redemption of preferred shares		60		1,302
Preferred dividends and accretion	(203)	(473)	(405)	(1,236)
Net income available to common shareholders	7,121	6,569	10,910	13,059
Net income available to common shareholders and assumed conversions	$ 7,121	$ 6,569	$ 10,910	$ 13,059
Weighted Average Shares
Net income available to common shareholders (in shares)	20,372,614	20,258,692	20,344,557	20,235,338
Effect of Dilutive stock options (in shares)	55,504	61,118	58,912	57,622
Net income available to common shareholders and assumed conversions (in shares)	20,428,118	20,319,810	20,403,469	20,292,960
Per Share Amount
Net income available to common shareholders (in dollars per share)	$ 0.35	$ 0.32	$ 0.54	$ 0.65
Net income available to common shareholders and assumed conversions (in dollars per share)	$ 0.35	$ 0.32	$ 0.53	$ 0.64
Stock options
Anti-dilutive securities
Common shares not considered in computing diluted earnings per share	298,975	296,972	278,255	274,313
Stock warrants
Anti-dilutive securities
Common shares not considered in computing diluted earnings per share	571,906	571,906	571,906	571,906