Loans, Allowance for Loan Losses and Credit Quality (Textual) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Unamortized Loan Commitment and Origination fees	5,500,000		$ 5,100,000
Significant Advanced Considered For Risk Rating Change	$ 50,000
Days to be termed as non accrual loans	90 days
Tdrs Recorded Investment On Nonaccrual Status	$ 5,439,000		5,199,000
Unamortized Discounts or Premiums	$ 8,300,000		$ 8,600,000