Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Mortgage loans:
Commercial real estate	$ 79,803	[1]	$ 97,547	[1]
Construction			308
Total mortgage loans	90,054		109,885
Commercial non-real estate	9,600	[1]	12,939	[1]
Consumer loans:
Home equity	14,542	[1]	14,590	[1]
Consumer and installment	20,555		22,939
Consumer lines of credit	286		300
Total consumer loans	35,383	[1]	37,829	[1]
Total loans	135,037		160,653
Unamortized loan discount	(193)		(231)
Allowance for loan losses	(4,505)		(4,549)
Net deferred loan origination costs	152		146
Total, net	130,491		156,019
Weighted-average interest rate of loans	5.01%		5.08%
Fixed Rate Residential Mortgage
Mortgage loans:
Residential	6,820		8,063
Adjustable Rate Residential Mortgage
Mortgage loans:
Residential	$ 3,431		$ 3,967

[1] Credit quality indicators are reviewed and updated as applicable on an ongoing basis in accordance with credit policies.