Allowance for Loan Losses and Credit Quality of Loans, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract
Financing Receivable, Modifications [Line Items]
Period of sustained repayment performance for nonperforming TDRs to be returned to performing status			6 months
Number of contracts	5	1	25	1
Pre-modification outstanding recorded investment	$ 300,000	$ 900,000	$ 1,300,000	$ 900,000
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	3	10	5	14
Pre-modification outstanding recorded investment	400,000	500,000	400,000	600,000
Residential Real Estate Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	2	1	15	1
Pre-modification outstanding recorded investment	200,000	100,000	1,200,000	100,000
Subsequent Default [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1		5
Pre-modification outstanding recorded investment	34,000		200,000
Subsequent Default [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	2	3	2	3
Pre-modification outstanding recorded investment	300,000	200,000	300,000	200,000
Subsequent Default [Member] | Residential Real Estate Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts			1
Pre-modification outstanding recorded investment			$ 100,000