Loans and Related Allowace for Loan Losses (Narrative) (Details)	6 Months Ended
	Jun. 30, 2013 loan
Period for loan to be Nonaccrual	90 days
Period for average historical loss for each portfolio segments	10 years
Period over which historical loss for portfolio segments has been used	7 years
Business lines of credit, maturity period	5 years
Period for loans to be considered for charge off	120 days
Number of troubled debt restructurings	5
Real Estate - Commercial [Member]
Maximum terms offered to loans	20 years
Maximum loan-to-value ratio	80.00%
Number of troubled debt restructurings	1
Home equity lines of credit [Member]
Maximum terms offered to loans	20 years
Maximum loan-to-value ratio	90.00%
Fixed Rate and Adjustable Rate Mortgage Loans [Member]
Maximum terms offered to loans	25 years
Home equity installment loans [Member]
Maximum terms offered to loans	15 years
Maximum loan-to-value ratio	80.00%
Real Estate - Mortgage [Member]
Maximum loan-to-value ratio	80.00%
Number of troubled debt restructurings	4