Accounting Policies (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
Basic earnings per share
Net income	$ 5,665	$ 4,910	$ 10,976	$ 9,523
Less: Preferred stock dividends and accretion of discount	96	106	242	263
Net Income Available to Common Shareholders	5,569	4,804	10,734	9,260
Weighted average common shares outstanding	8,617,466	7,434,537	8,617,466	7,428,699
Basic earnings per share	$ 0.65	$ 0.65	$ 1.25	$ 1.25
Diluted earnings per share
Net income available to common shareholders	$ 5,569	$ 4,804	$ 10,734	$ 9,260
Weighted average common shares outstanding	8,617,466	7,434,537	8,617,466	7,428,699
Effect of dilutive securities:
Warrants	287,815	238,512	290,550	204,770
Weighted average shares outstanding	8,974,103	7,728,519	8,977,408	7,674,273
Diluted earnings per share	$ 0.62	$ 0.62	$ 1.20	$ 1.21
Restricted stock [Member]
Effect of dilutive securities:
Effect of dilutive securities	35,263	26,373	35,411	18,561
Stock options [Member]
Effect of dilutive securities:
Effect of dilutive securities	33,559	29,097	33,981	22,244