Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Commitments to extend credit	Dec. 31, 2012 Commitments to extend credit	Dec. 31, 2013 Standby letters of credit	Dec. 31, 2012 Standby letters of credit	Dec. 31, 2013 Unadvanced Commitment on Impaired Loan [Member]	Dec. 31, 2012 Unadvanced Commitment on Impaired Loan [Member]	Dec. 31, 2013 Fixed Rate Loan Commitment Commitments to extend credit	Dec. 31, 2012 Fixed Rate Loan Commitment Commitments to extend credit
Schedule of Commitments [Line Items]
Loans and Leases Receivable, Impaired Loans, Commitment to Lend							$ 79	$ 800
Estimated losses attributable to unadvanced commitments on impaired loans							150	124
Off-balance sheet financial instruments, contractual amounts			$ 804,420	$ 722,325	$ 44,376	$ 42,561			$ 50,300	$ 50,700
Remaining term of letters of credit	5 years	1 month