Consolidated Statement of Changes in Shareholders' Equity - (Unaudited) (USD $) In Thousands, except Share data	Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2010	$ 105,140	$ 0	$ 8,398	$ 88,132	$ 10,506	$ (1,896)	$ 0
Beginning balance (in shares) at Dec. 31, 2010	8,398,015
Beginning Balance Shares of Preferred Stock Outstanding at Dec. 31, 2010	0
Comprehensive income	4,216				811	3,405
Stock-based compensation expense	515			515
Common stock issued, net of costs	28,526		2,374	26,152
Common stock issued, net of costs (in shares)	2,373,599
Shares issued in the acquisition of Berkshire Bancorp, Inc	11,274	3,037	623	7,614
Shares issued in the acquisition of Berkshire Bancorp, Inc (in shares)		3,037	623,990
Dividends - preferred stock	(5)				(5)
Ending balance at Sep. 30, 2011	149,666	3,037	11,395	122,413	11,312	1,509	0
Ending Balance Shares of Preferred Stock Outstanding at Sep. 30, 2011	3,037
Ending balance (in shares) at Sep. 30, 2011	11,395,604
Beginning balance at Dec. 31, 2011	147,748	0	11,395	122,602	14,496	(245)	(500)
Beginning balance (in shares) at Dec. 31, 2011	11,347,683
Beginning Balance Shares of Preferred Stock Outstanding at Dec. 31, 2011	0
Comprehensive income	17,376				16,252	1,124
Stock-based compensation expense	1,616			1,616
Common stock issued, net of costs	94,762		7,112	87,650
Common stock issued, net of costs (in shares)	7,111,819
Ending balance at Sep. 30, 2012	$ 261,502	$ 0	$ 18,507	$ 211,868	$ 30,748	$ 879	$ (500)
Ending Balance Shares of Preferred Stock Outstanding at Sep. 30, 2012	0
Ending balance (in shares) at Sep. 30, 2012	18,459,502