Loans Receivable, Financial Instruments Whose Contract Amounts Represent Credit Risk (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Standby Letters of Credit [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	$ 12,214,000	$ 14,719,000
Current liability for guarantees	1,326,000	0
Home Equity Lines of Credit [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	8,732,000	12,345,000
Loan expiry period	10 years
Unadvanced Construction Commitments [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	36,955,000	34,023,000
Fixed rate loan commitments	4,104,000	4,193,000
Fixed interest rate, minimum (in hundredths)	3.875%	3.625%
Fixed interest rate, maximum (in hundredths)	4.75%	5.25%
Floating rate loan commitments	0	0
Mortgage Loan Commitments [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	4,104,000	4,193,000
Lines of Credit [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	20,985,000	30,965,000
Loans Sold with Limited Repurchase Provisions [Member]
Financial instruments whose contract amount represents credit risk [Abstract]
Off-balance sheet credit risk	20,531,000	28,134,000
Loans receivable held-for-sale, amount	$ 61,391,000	$ 116,788,000