Loans Receivable Held-For-Sale - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Loan	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of non-performing loans	30
Transfers of loans receivable from loans receivable, net to loans receivable held-for-sale, net	$ 9,667,000	$ 2,544,000
Charge-offs, loans transferred to held for sale	3,600,000
Sale of non-performing loans	2,900,000
Net losses on sale of loans	(253,000)	(88,000)
Transfers of loans receivable held-for-sale to REO	334,000	1,526,000
Market write downs (recoveries) on non-performing loans held for sale	(109,000)	1,600,000
Change in valuation allowance on performing loans receivable held for sale	25,000	48,000
Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfers of loans receivable from loans receivable, net to loans receivable held-for-sale, net	9,700,000
One-to-four units
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of non-performing loans	30
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of non-performing loans	2
Commercial real estate properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfers of loans receivable held-for-sale to REO	334,000
Charge-offs, loan	327,000
Number of loans transferred to REO	2
Church
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of non-performing loans	2
Transfers of loans receivable held-for-sale to REO		1,526,000
Charge-offs, loan		$ 1,700,000
Number of loans transferred to REO		2