Allowance for Loan Losses and Credit Quality of Loans, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 Contract	Mar. 31, 2013 Contract
Financing Receivable, Modifications [Line Items]
Period of sustained repayment performance for nonperforming TDRs to be returned to performing status	6 months
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	22	10
Pre-modification outstanding recorded investment	$ 1,100,000	$ 600,000
Residential Real Estate Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	12	1
Pre-modification outstanding recorded investment	1,000,000	100,000
Subsequent Default [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Pre-modification outstanding recorded investment	11,000
Subsequent Default [Member] | Residential Real Estate Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Pre-modification outstanding recorded investment	$ 100,000