CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Shares [Member]	Retained Earnings [Member]	Treasury Shares [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010	$ 70,707	$ 26,515	$ 54,045	$ (11,698)	$ 1,845
Balance (in shares) at Dec. 31, 2010		6,689,743
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,115		8,115
Net unrealized gain on available-for-sale securities, net of tax	3,852				3,852
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income, net of taxes	(625)				(625)
Change in nonqualified pension plan unrecognized net gain (loss) and unrecognized prior service cost, net of taxes	(199)				(199)
Nonqualified pension plan curtailment, net of taxes	155				155
Dividend Reinvestment and Stock Purchase Plan (in shares)		14,980
Dividend Reinvestment and Stock Purchase Plan	193	193
Exercise of stock options (in shares)	0
Compensation expense relating to stock options	45	45
Common stock dividends	(4,283)		(4,283)
Balance at Dec. 31, 2011	77,960	26,753	57,877	(11,698)	5,028
Balance (in shares) at Dec. 31, 2011		6,704,723
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,270		8,270
Net unrealized gain on available-for-sale securities, net of tax	918				918
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income, net of taxes	(1,223)				(1,223)
Change in nonqualified pension plan unrecognized net gain (loss) and unrecognized prior service cost, net of taxes	(2)				(2)
Nonqualified pension plan curtailment, net of taxes	0
Dividend Reinvestment and Stock Purchase Plan (in shares)		25,033
Dividend Reinvestment and Stock Purchase Plan	332	332
Exercise of stock options (in shares)	8,676	2,144
Exercise of stock options	28		(5)	33
Excess tax (benefit) expense on exercise and forfeiture of stock options	(19)	(19)
Compensation expense relating to stock options	41	41
Common stock dividends	(4,299)		(4,299)
Balance at Dec. 31, 2012	82,006	27,107	61,843	(11,665)	4,721
Balance (in shares) at Dec. 31, 2012		6,731,900
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,780		8,780
Net unrealized gain on available-for-sale securities, net of tax	(5,706)				(5,706)
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income, net of taxes	(810)				(810)
Change in nonqualified pension plan unrecognized net gain (loss) and unrecognized prior service cost, net of taxes	73				73
Nonqualified pension plan curtailment, net of taxes	0
Issuance of common stock (in shares)		1,642,857
Issuance of common stock	26,909	26,909
Dividend Reinvestment and Stock Purchase Plan (in shares)		18,348
Dividend Reinvestment and Stock Purchase Plan	329	329
Acquisition of First Capital Bancshares, Inc. (in shares)		888,811
Acquisition of First Capital Bancshares, Inc.	12,321	12,321
Exercise of stock options (in shares)	5,620	5,620
Exercise of stock options	70	70	0	0	0
Excess tax (benefit) expense on exercise and forfeiture of stock options	12	12
Compensation expense relating to stock options	37	37
Common stock dividends	(5,148)		(5,148)
Balance at Dec. 31, 2013	$ 118,873	$ 66,785	$ 65,475	$ (11,665)	$ (1,722)
Balance (in shares) at Dec. 31, 2013		9,287,536