Delinquency Information for Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due		$ 2,457
60-89 Days Past Due		569
90 Days or More Past Due		2,816
Total Past Due		5,842
Current	4,375	18,580
Total	4,375	24,422
Commercial real estate loans
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or More Past Due
Total Past Due
Current	1,549	1,722
Total	1,549	1,722
Commercial loans
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or More Past Due
Total Past Due
Current	2,826	491
Total	2,826	491
Commercial loans | Revolving lines of credit
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or More Past Due
Total Past Due
Current	2,272
Total	2,272
Commercial loans | Term note
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or More Past Due
Total Past Due
Current	554	491
Total	554	491
Residential real estate loans
Financing Receivable Recorded Investment [Line Items]
30-59 Days Past Due		2,457
60-89 Days Past Due		569
90 Days or More Past Due		2,816
Total Past Due		5,842
Current		16,367
Total		$ 22,209