Delinquency Information for Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 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	3,785	18,580
Total	3,785	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	1,610	1,722
Total	1,610	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	2,175	491
Total	2,175	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	1,643
Total	1,643
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	532	491
Total	532	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