Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Preferred Stock	PreferredStockDiscountMemberMember	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance at Dec. 31, 2009	$ 65,000	$ (3,789)	$ 102,691	$ 182,908	$ (4,427)	$ 342,383
Beginning balance, shares at Dec. 31, 2009			16,722,000
Net income (loss)				9,982		9,982
Common stock issued under stock option plans			171			171
Common stock issued under stock option plans, shares			17,000
Common stock issued into dividend reinvestment plan			669			669
Common stock issued into dividend reinvestment plan, shares			46,000
Repurchase of outstanding common stock warrants
Cash dividends declared				(5,370)		(5,370)
Preferred dividends				(3,250)		(3,250)
Accretion of preferred stock discount		857		(857)
Tax benefit realized from exercise of nonqualified stock options			36			36
Stock-based compensation			640			640
Stock-based compensation, shares			16,000
Other comprehensive income					(658)	(658)
Ending balance at Dec. 31, 2010	65,000	(2,932)	104,207	183,413	(5,085)	344,603
Ending balance, shares at Dec. 31, 2010			16,801,000
Net income (loss)				13,642		13,642
Preferred stock redeemed	(65,000)
Preferred stock issued	63,500
Common stock issued under stock option plans			30			30
Common stock issued under stock option plans, shares			2,000
Common stock issued into dividend reinvestment plan			851			851
Common stock issued into dividend reinvestment plan, shares			71,000
Repurchases of common stock			(228)			(228)
Repurchases of common stock, shares			(20,000)
Repurchase of outstanding common stock warrants			(924)			(924)
Cash dividends declared				(5,398)		(5,398)
Preferred dividends				(3,234)		(3,234)
Accretion of preferred stock discount		2,932		(2,932)
Tax benefit realized from exercise of nonqualified stock options
Stock-based compensation			905			905
Stock-based compensation, shares			56,000
Other comprehensive income					(3,597)	(3,597)
Ending balance at Dec. 31, 2011	63,500		104,841	185,491	(8,682)	345,150
Ending balance, shares at Dec. 31, 2011			16,909,820			16,909,820
Net income (loss)				(23,406)		(23,406)
Preferred stock issued	7,287					7,287
Common stock issued under stock option plans			26,392			26,392
Common stock issued under stock option plans, shares			2,656,294
Common stock issued into dividend reinvestment plan			335			335
Common stock issued into dividend reinvestment plan, shares			31,000
Repurchases of common stock			(2)			(2)
Repurchases of common stock, shares
Cash dividends declared				(5,647)		(5,647)
Preferred dividends				(2,809)		(2,809)
Stock-based compensation			311			311
Stock-based compensation, shares			72,000
Other comprehensive income					8,506	8,506
Ending balance at Dec. 31, 2012	$ 70,787		$ 131,877	$ 153,629	$ (176)	$ 356,117
Ending balance, shares at Dec. 31, 2012			19,669,302			19,669,302