Recorded Investment in Non-Accrual Loans by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 37,090	$ 44,748
Loans receivable held for sale | Real estate | One-to-four units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	6,656	0
Loans receivable held for sale | Real estate | Five or more units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	1,956	2,496
Loans receivable held for sale | Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	0	338
Loans receivable held for sale | Real estate | Church
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	1,556	2,778
Loans receivable held for investment | Real estate | One-to-four units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	1,489	7,974
Loans receivable held for investment | Real estate | Five or more units
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	2,312	3,450
Loans receivable held for investment | Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	7,090	5,449
Loans receivable held for investment | Real estate | Church
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	15,689	21,891
Loans receivable held for investment | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	273	302
Loans receivable held for investment | Consumer | Consumer Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 69	$ 70