Loans and Allowance for Loan Losses (Additional Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 industry	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ (474,000)
Increase (Decrease) in Finance Receivables	192,200,000
Number of Portfolio Concentration Industries	2
Non-residential building operator loans expressed as a percentage of the total commercial real estate loans	26.00%
Lodging loans expressed as a percentage of the total commercial real estate loans	27.00%
Foregone interest	842,000	990,000	1,100,000
Residential real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable in Process of Foreclosure	4,900,000	4,400,000
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans restructured due to credit difficulties that are now performing	4,500,000	5,500,000
Financing Receivables Impaired Troubled Debt Restructuring Non-Performing	$ 1,500,000	$ 1,600,000
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
loans in foreclosure percentage of non-performing loans	61.00%	35.00%