Loans Receivable - Schedule of Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	$ 420,033	$ 405,895
Total commercial real estate	96,115	96,955
Subtotal mortgage loans	516,148	502,850
Total consumer loans	137,293	134,885
Commercial business	51,148	54,445
Subtotal other loans	188,441	189,330
Total Loans Receivable	704,589	692,180
Allowance for loan losses	6,713	6,709
Deferred loan fees and net discounts	(2,133)	(1,862)
Loans in process	16,305	15,247
Subtotal	20,885	20,094
Net loans receivable	683,704	672,086
Residential Real Estate, Single Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	335,419	326,005
Total Loans Receivable	335,419	326,005
Residential Real Estate Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	38,291	33,472
Total Loans Receivable	38,291	33,472
Residential Real Estate, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total residential real estate	46,323	46,418
Total Loans Receivable	46,323	46,418
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial real estate	79,299	81,077
Total Loans Receivable	96,115	96,955
Commercial Real Estate, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial real estate	16,816	15,878
Total Loans Receivable	16,816	15,878
Consumer Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	82,193	80,418
Total Loans Receivable	82,193	80,418
Dealer Auto and RV Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	48,003	46,571
Total Loans Receivable	48,003	46,571
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	7,097	7,896
Total Loans Receivable	$ 7,097	$ 7,896