Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Nonvoting Common Stock [Member]	Common Stock Warrants [Member]	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Series B1 Preferred Stock [Member]	Series C Preferred Stock [Member]	Retained Earnings [Member]	Common Stock Shares Held in Rabbi Trust [Member]	Directors Deferred Fees Obligation [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, Value at Dec. 31, 2011	$ 163,855			$ 2,412		$ 17,161			$ 25,614	$ (2,505)	$ 2,505	$ 1,010
Net Income	4,016								4,016
Directors Deferred Fees	0									(513)	513
Other Comprehensive Income (Loss), Net of Tax	2,740											2,740
Ending Balance, Value at Mar. 31, 2012
Beginning Balance, Value at Dec. 31, 2011	163,855	87,421		2,412	30,237	17,161			25,614
Beginning Balance Shares at Dec. 31, 2011		9,100,890
Net Income	4,016
Other Comprehensive Income (Loss), Net of Tax	2,740
Preferred Stock, Value, Issued	68,308						40,688	27,620
Common Stock Issued Pursuant To [Abstract]
Exercise of Stock Options, Shares		48,092
Current Income Tax Benefit	17	17
Exercise of Stock Options	286	286
Stock-based Compensation, Shares		10,823
Dividend Reinvestment Plan, Shares		13,270
Dividend Reinvestment Plan, Values	101	101
Shares Traded to Exercise Options, Shares		(19,189)
Shares Traded to Exercise Options, Values	(148)	(148)
Stock-Based Compensation, Value	237	237
Cash Dividends:
Common Stock, Cash Dividend Per Share	(911)								(911)
Preferred Stock, Net of Accretion	(962)				240				(1,202)
Ending Balance, Value at Jun. 30, 2012	237,539	87,914		2,412	30,477	17,161	40,688	27,620	27,517	(3,018)	3,018	3,750
Ending Balance, Shares at Jun. 30, 2012		9,153,886
Beginning Balance, Value at Mar. 31, 2012
Net Income	2,291
Other Comprehensive Income (Loss), Net of Tax	2,189
Preferred Stock, Value, Issued	68,308						40,688	27,620
Ending Balance, Value at Jun. 30, 2012	237,539			2,412		17,161	40,688	27,620		(3,018)	3,018	3,750
Beginning Balance, Value at Dec. 31, 2012	282,244	157,541	40,688		30,717	17,161			30,708	(3,090)	3,090	5,429
Beginning Balance Shares at Dec. 31, 2012		20,462,667	4,187,647
Net Income	8,946								8,946
Directors Deferred Fees	0									71	(71)
Other Comprehensive Income (Loss), Net of Tax	(2,856)											(2,856)
Common Stock Issued Pursuant To [Abstract]
Exercise of Stock Options, Shares	0
Stock-based Compensation, Shares		10,604
Dividend Reinvestment Plan, Shares		13,726
Dividend Reinvestment Plan, Values	128	128
Stock Issued During Period, Shares, Conversion of Convertible Securities		0	1,804,566
Stock Issued During Period, Value, Conversion of Convertible Securities	0	0	17,161			(17,161)
Stock-Based Compensation, Value	406	406
Redemption of Preferred Stock	(31,260)				(31,260)				0
Cash Dividends:
Common Stock, Cash Dividend Per Share	(2,646)								(2,646)
Preferred Stock, Net of Accretion	(517)				543				(1,060)
Ending Balance, Value at Jun. 30, 2013	$ 254,445	$ 158,075	$ 57,849		$ 0	$ 0			$ 35,948	$ (3,019)	$ 3,019	$ 2,573
Ending Balance, Shares at Jun. 30, 2013		20,486,997	5,992,213