Loans Receivable - Schedule of Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	$ 434,439	$ 423,959
Total commercial real estate	92,677	103,337
Subtotal mortgage loans	527,116	527,296
Total consumer loans	139,751	136,142
Commercial business	57,902	52,801
Subtotal other loans	197,653	188,943
Total loans receivable	724,769	716,239
Allowance for loan losses	6,751	6,805
Deferred loan fees and net discounts	(2,449)	(2,007)
Loans in process	13,998	15,805
Subtotal	18,300	20,603
Net loans receivable	706,469	695,636
Residential Real Estate, Single Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	354,678	341,775
Total loans receivable	354,678	341,775
Residential Real Estate, Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	41,423	37,857
Total loans receivable	41,423	37,857
Residential Real Estate, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	38,338	44,327
Total loans receivable	38,338	44,327
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial real estate	82,191	77,366
Total loans receivable	92,677	103,337
Commercial Real Estate, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial real estate	10,486	25,971
Total loans receivable	10,486	25,971
Consumer Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	84,198	82,987
Total loans receivable	84,198	82,987
Consumer Dealer Auto and RV Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	49,605	46,502
Total loans receivable	49,605	46,502
Consumer Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	5,948	6,653
Total loans receivable	$ 5,948	$ 6,653