Parent Corporation Only Financial Statements (Schedule of Condensed Cash Flow Statement) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Net income	$ 17,507	$ 13,926	$ 7,004
Deferred Income Tax Expense (Benefit)	1,912	3,406	51
Increase (Decrease) in Other Operating Assets	2,538	402	(1,642)
Increase (Decrease) in Other Operating Liabilities	980	(585)	(2,426)
Share-based Compensation	39	35	51
Net Cash Provided by (Used in) Operating Activities	21,066	18,084	17,647
Proceeds from Sale and Maturity of Available-for-sale Securities	130,100	25,480	644,100
Net Cash Provided by (Used in) Investing Activities	(108,320)	(152,580)	(68,651)
Net (increase) decrease in loans	(83,478)	(49,223)	8,348
Cash dividends on common stock	(2,778)	(1,955)	(1,800)
Cash dividends on preferred stock	(363)	(417)	(500)
Issuance cost of common stock	0	0	(770)
Proceeds from Stock Options Exercised	141	328	0
Net Cash Provided by (Used in) Financing Activities	82,291	208,100	(667)
Cash and Cash Equivalents, Period Increase (Decrease)	(4,963)	73,604	(51,671)
Cash and cash equivalents at beginning of period	111,101	37,497	89,168
Cash and cash equivalents at end of period	106,138	111,101	37,497
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	17,507	13,926	7,004
Gain (Loss) on Sale of Equity Investments	(26)		97
Equity In Undistributed Income Of Subsidiaries	(15,709)	(13,455)	(6,938)
Deferred Income Tax Expense (Benefit)		3	224
Increase (Decrease) in Other Operating Assets	563	(298)	(44)
Increase (Decrease) in Other Operating Liabilities	(772)	220	70
Share-based Compensation	39	35	51
Net Cash Provided by (Used in) Operating Activities	1,602	431	464
Maturity of available-for-sale securities			130
Proceeds from Sale and Maturity of Available-for-sale Securities	375
Purchase of available-for-sale securities	(410)
Net Contribution To Subsidiary		(1,250)	(8,000)
Net Cash Provided by (Used in) Investing Activities	(35)	(1,250)	(7,870)
Net (increase) decrease in loans		310	82
Cash dividends on common stock	(2,778)	(1,955)	(1,800)
Cash dividends on preferred stock	(363)	(417)	(500)
Warrant Repurchased		245
Issuance cost of common stock	(8)	(5)	(6)
Proceeds from Stock Options Exercised	141	328
Proceeds from Sale of Restricted Investments			25
Proceeds from Issuance of Preferred Stock and Preference Stock			12,148
Proceeds From Issuance Of Shares From Stock Offerings			770
Tax Expense From Stock Based Compensation	28		7
Net Cash Provided by (Used in) Financing Activities	(2,980)	(1,438)	9,022
Cash and Cash Equivalents, Period Increase (Decrease)	(1,413)	(2,257)	1,616
Cash and cash equivalents at beginning of period	2,042	4,299	2,683
Cash and cash equivalents at end of period	629	2,042	4,299
Series A Preferred Stock [Member] | Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Redemption Of Series A Preferred Stock		10,000
Series B Preferred Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Issuance cost of common stock	0	(84)	0
Proceeds from Issuance of Preferred Stock and Preference Stock	0	11,250	0
Series B Preferred Stock [Member] | Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Issuance cost of common stock		(84)
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 11,250