Summary of Loans Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Due From Related Parties [Line Items]
Aggregate balance - January 1	$ 7,633	$ 8,846
New loans	496	352
Repayments	(2,935)	(1,565)
Aggregate balance - December 31	$ 5,194	$ 7,633

For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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+ Details