Consolidated Statement of Shareholders' Equity (USD $) In Thousands, except Share data	Common stock [Member]	Surplus [Member]	Retained earnings [Member]	Accumulated other comprehensive income [Member]	Treasury stock [Member]	Total
Balance at Dec. 31, 2011	$ 2,087	$ 11,679	$ 54,886	$ 4,665	$ (2,476)	$ 70,841
Balance, shares at Dec. 31, 2011	3,174,245					3,174,245
Net income			7,050			7,050
Other comprehensive income, net of tax				929		929
Cash dividends declared			(2,489)			(2,489)
Stock issued in connection with dividend reinvestment and stock purchase plan	18	634				652
Stock issued in connection with dividend reinvestment and stock purchase plan - Shares	28,209
Stock issued for employee stock purchase plan	1	41				42
Stock issued for employee stock purchase plan- shares	2,186
Stock issued for options exercised	5	27				32
Stock issued for options exercised - Shares	8,153
Tax benefit from exercise of stock options exercised		14				14
Stock-based compensation expense		57				57
Balance at Sep. 30, 2012	$ 2,111	$ 12,452	$ 59,447	$ 5,594	$ (2,476)	$ 77,128
Balance, shares at Sep. 30, 2012	3,212,793					3,212,793