Shareholders' Equity (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Aug. 21, 2007
Shareholders' Equity (Textual) [Abstract]
Cash dividends paid	$ 2,878	$ 2,866,000
Shareholder Rights Plan	Jun. 25, 2001
Amendment date of Rights Plan	Jul. 08, 2011
Extended maturity date of Rights Plan	Jul. 10, 2021
Percentage of restriction on acquiring outstanding common stock by person or group	15.00%
Preferred Stock dividend declared for each common share held	1
Initial exercise price of rights'	49.00
Redemption price of rights	$ 0.01
Repurchase of common stock				500,000
Stock repurchase plan percentage of common stock				3.20%
Common stock, shares outstanding	15,992,893		15,978,958	15,814,662
Repurchased shares outstanding	166,600
Company's common stock in lieu of cash to exercise options to purchase shares	0
Percentage of minimum tender purchase of company's common stock	15.00%
Company's common stock shares acquiring market value	50.00%