CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Redemption of preferred stock, shares			83,094
Common stock dividends, per share	$ 0.46	$ 0.34	$ 0.04
Preferred stock dividends, per share			$ 50.00
Common stock issuance, shares			7,475,000
Acquisition of CommerceFirst Bancorp, Inc	732,054
Stock option plan, shares	3,906	(2,037)	(30,498)
Employee stock purchase plan, shares	30,795	33,284	33,826
Restricted stock, shares	46,512	30,853	15,477
Director stock purchase plan, shares	1,083	1,833	3,709
DRIP plan, shares			265
Purchase of treasury shares, shares		23,592