Allowance for Loan Losses by Portfolio Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 17,299	$ 20,458
Provision for loan losses	1,190	12,153
Recoveries	520	112
Loans charged off	(7,140)	(15,424)
Ending balance	11,869	17,299
One-to-four units
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4,855	4,579
Provision for loan losses	2,318	1,172
Recoveries	25	0
Loans charged off	(5,138)	(896)
Ending balance	2,060	4,855
Five or more units
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,972	2,469
Provision for loan losses	(747)	939
Recoveries	1	2
Loans charged off	(104)	(438)
Ending balance	2,122	2,972
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,108	3,493
Provision for loan losses	61	4,144
Recoveries	60	15
Loans charged off	(544)	(4,544)
Ending balance	2,685	3,108
Church
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,742	6,909
Provision for loan losses	415	2,616
Recoveries	15	4
Loans charged off	(1,354)	(3,787)
Ending balance	4,818	5,742
Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	249	74
Provision for loan losses	(241)	175
Recoveries	0	0
Loans charged off	0	0
Ending balance	8	249
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	247	1,300
Provision for loan losses	(561)	2,796
Recoveries	412	67
Loans charged off	0	(3,916)
Ending balance	98	247
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	126	1,634
Provision for loan losses	(55)	311
Recoveries	7	24
Loans charged off	0	(1,843)
Ending balance	$ 78	$ 126