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, 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
Other comprehensive gain (loss), net of taxes	(307)				(307)
Dividend Reinvestment and Stock Purchase Plan (in shares)		25,033
Dividend Reinvestment and Stock Purchase Plan	332	332
Exercise of stock options (in shares)	2,144	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, $0.64 per share	(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
Other comprehensive gain (loss), net of taxes	(6,443)				(6,443)
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
Excess tax (benefit) expense on exercise and forfeiture of stock options	12	12
Compensation expense relating to stock options	37	37
Common stock dividends, $0.64 per share	(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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,869		9,869
Other comprehensive gain (loss), net of taxes	2,507				2,507
Dividend Reinvestment and Stock Purchase Plan (in shares)		23,782
Dividend Reinvestment and Stock Purchase Plan	372	372
Exercise of stock options (in shares)	0
Compensation expense relating to stock options	24	24
Common stock dividends, $0.64 per share	(5,950)		(5,950)
Balance at Dec. 31, 2014	$ 125,695	$ 67,181	$ 69,394	$ (11,665)	$ 785
Balance (in shares) at Dec. 31, 2014		9,311,318