Nature of Banking Activities and Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Principles of Consolidation [Abstract]
Number of wholly-owned subsidiaries	3
Increase in outstanding debt related to the deconsolidation of Trust I	$ 124,000
Percentage of total capital permitted for trust preferred securities, maximum (in hundredths)	25.00%
Loans [Abstract]
Number of days past due before a loan is considered nonaccrual	90 days
Number of days past due before a loan is charged-off	180 days
Allowance for Loan Losses [Abstract]
Number of rolling prior quarters used to evaluate status of loan portfolio segments	8
Stock Compensation Plans [Abstract]
Options granted (in shares)	0	0	0
Marketing [Abstract]
Marketing expense	$ 692,000	$ 662,000	$ 675,000
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	39 years
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	5 years