Recorded Investment in Non-Accrual Loans by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 26,818	$ 37,090
Loans receivable held for sale | Real estate | One-to-four units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	0	6,656
Loans receivable held for sale | Real estate | Five or more units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	3,033	1,956
Loans receivable held for sale | Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	3,004	0
Loans receivable held for sale | Real estate | Church
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	2,023	1,556
Loans receivable held for investment | Real estate | One-to-four units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	1,444	1,489
Loans receivable held for investment | Real estate | Five or more units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	1,676	2,312
Loans receivable held for investment | Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	2,874	7,090
Loans receivable held for investment | Real estate | Church
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	12,598	15,689
Loans receivable held for investment | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	0	273
Loans receivable held for investment | Commercial | Commercial Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	97	0
Loans receivable held for investment | Consumer | Consumer Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 69	$ 69