Allowance for Loan Losses by Portfolio Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 11,869	$ 17,299
Provision for loan losses	0	959
Recoveries	376	138
Loans charged off	(1,795)	(644)
Ending balance	10,450	17,752
One-to-four units
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,060	4,855
Provision for loan losses	(449)	336
Recoveries	259	0
Loans charged off	(36)	(355)
Ending balance	1,834	4,836
Five or more units
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,122	2,972
Provision for loan losses	(361)	41
Recoveries	0	0
Loans charged off	(638)	0
Ending balance	1,123	3,013
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,685	3,108
Provision for loan losses	(207)	(206)
Recoveries	15	15
Loans charged off	(944)	(58)
Ending balance	1,549	2,859
Church
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4,818	5,742
Provision for loan losses	1,029	979
Recoveries	7	4
Loans charged off	(177)	(231)
Ending balance	5,677	6,494
Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	8	249
Provision for loan losses	0	(16)
Recoveries	0	0
Loans charged off	0	0
Ending balance	8	233
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	98	247
Provision for loan losses	(12)	(133)
Recoveries	95	117
Loans charged off	0	0
Ending balance	181	231
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	78	126
Provision for loan losses	0	(42)
Recoveries	0	2
Loans charged off	0	0
Ending balance	$ 78	$ 86