Monthly Average of Individually Impaired Loans by Class of Loans and Related Interest Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 55,160	$ 59,843
Cash Basis Interest Income Recognized	1,828	2,606
Real estate | One-to-four units
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	13,112	10,836
Cash Basis Interest Income Recognized	528	486
Real estate | Five or more units
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,964	3,199
Cash Basis Interest Income Recognized	86	153
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	7,922	11,687
Cash Basis Interest Income Recognized	230	483
Real estate | Church
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	30,802	30,148
Cash Basis Interest Income Recognized	967	1,445
Real estate | Construction
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	290	314
Cash Basis Interest Income Recognized	12	23
Commercial | Commercial Sports
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	2,566
Cash Basis Interest Income Recognized	0	0
Commercial | Commercial Other
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	297
Cash Basis Interest Income Recognized	0	16
Consumer | Consumer Loan on savings
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	796
Cash Basis Interest Income Recognized	0	0
Consumer | Consumer Other
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	70	0
Cash Basis Interest Income Recognized	$ 5	$ 0