Consolidated Statements of Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Preferred Stock	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance at Dec. 31, 2011	$ 63,500	$ 104,841	$ 185,491	$ (8,682)	$ 345,150
Beginning balance, shares at Dec. 31, 2011		16,910
Net income			2,531		2,531
Common stock issued into dividend reinvestment plan		335			335
Common stock issued into dividend reinvestment plan, shares		31
Repurchases of common stock		(2)			(2)
Repurchases of common stock, shares
Cash dividends declared			(4,073)		(4,073)
Preferred dividends			(2,277)		(2,277)
Stock-based compensation		280			280
Stock-based compensation, shares		72
Other comprehensive income				846	846
Ending balance at Sep. 30, 2012	63,500	105,454	181,672	(7,836)	342,790
Ending balance, shares at Sep. 30, 2012		17,013			17,013,008
Beginning balance at Dec. 31, 2012	70,787	131,877	153,629	(176)	356,117
Beginning balance, shares at Dec. 31, 2012		19,669			19,669,302
Net income			15,021		15,021
Cash dividends declared			(4,722)		(4,722)
Preferred dividends			(678)		(678)
Stock-based compensation		221			221
Stock-based compensation, shares		11
Other comprehensive income				(3,217)	(3,217)
Ending balance at Sep. 30, 2013	$ 70,787	$ 132,098	$ 163,250	$ (3,393)	$ 362,742
Ending balance, shares at Sep. 30, 2013		19,680			19,679,659