Short Term and Long Term Borrowings (Details) (USD $)				12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]
Debt Instrument [Line Items]
Overnight repurchase agreements	$ 35,946,000		$ 35,001,000
Overnight repurchase agreements maturity period				4 days	1 day
Number of customer relationships	5
Major customer relationship repurchase agreements maximum percentage (in hundredths)	5.00%
Outstanding balance	28,100,000
Percentage of repurchase agreements (in hundredths)	75.41%
1 - 4 family residential real estate pledged loans	64,500,000
Fixed Rate [Abstract]
Due in one year or less		[1]	10,000,000
Due after one year through five years	25,000,000		25,000,000
Total long-term debt	25,000,000		35,000,000
Total [Abstract]
Due in one year or less		[1]
Due after three years through four years	25,000,000
Total long-term debt	$ 25,000,000
Weighted Avg Rate [Abstract]
Due in one year or less (in hundredths)		[1]	4.74%
Due after three years through four years (in hundredths)	4.83%
Due after four years through five years (in hundredths)			4.83%
Total long-term debt (in hundredths)	4.83%		4.80%

[1] N/A