Common Stock and Basic Earnings Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Common Stock And Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic, Total	12,915,259	12,831,919	12,926,343	12,816,813
Number of shares authorized to be repurchased under the stock repurchase program	1,200,000		1,200,000
Number of remaining shares authorized to be repurchased under the stock repurchase program	1,106,948		1,106,948
Number of shares repurchased and retired under the stock repurchase program	82,413		93,052