Mortgage Servicing (Additional Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Servicing Assets at Fair Value [Line Items]
Mortgage servicing fee income	$ 679,000	$ 320,000	$ 437,000
Servicing Asset at Fair Value, Amount	1,494,000	879,000	1,138,000	973,000
Freddie Mac [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage loans serviced during period, value	157,900,000	156,100,000	178,000,000
Custodial escrow balances	518,000	449,000
Maine State Housing Authority [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage servicing fee income	1,100,000	1,200,000	1,100,000
Mortgage loans serviced during period, value	614,400,000	650,600,000	709,600,000
Custodial escrow balances	$ 5,300,000	$ 5,400,000