Loans, Allowance for Loan Losses and Credit Quality (Textual) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 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		$ 5,600,000		$ 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		$ 5,728,000		5,199,000
Unamortized Discounts or Premiums		$ 10,200,000		$ 8,600,000